SFOtoHKGin5min
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Latest revision as of 15:57, 10 February 2016
Contents |
San Francisco to Hong Kong in 5 minutes
Introduction
This is a followon article to CheapFlights, and while the metaphor may be showing stress cracks, please bear with me. In the previous article we made the most of a single threaded, and hence single core program, by taking advantage of the embarrassingly parallel nature of moving the camera. The time taken to render any given frame, however, was completely unchanged from running povray directly on a corn. To break the 15 minute barrier (for this particular scene file) we need to employee an HPC specific technology - MPI.
Stmvao-white short.png
MPI stands for Message Passing Interface and is typically used as a library to a compiled language (C/C++/Fortran) or an interpreted (byte compiled actually) language such as Python. In this example we will explore a parallel raytracer called Tachyon which uses MPI as one of the available parallel options. MPI allows Tachyon access to the distributed compute and memory of all cores participating in the job. It is up to the code in Tachyon, then, to decide how to break up the task of rendering a frame such that all of the cores in the job can execute their portion and communicate their results back. This architectural decision has been made in the code of Tachyon, and we are free to run jobs on the barley cluster using as few or many cores as long as the number fits within those constraints. This number we choose becomes the size of our Tachyon job we submit to the scheduler.
Let's explore what kind of speedup Tachyon can achieve on the barley cluster. This cluster is 10 gigabit ethernet connected, which plays an important part, as all of the intermediate processing steps are communicated within all nodes participating in the job.
Executive Summary
We explore the possibilites presented by a parallel raytracer (Tachyon) using OpenMPI (an MPI library). Given a sample scene file, a singe core job takes 8.8 minutes to render a single frame. Rendering the same scene file as a 208 core MPI job on the barley cluster takes 3.4 seconds. This is a speedup of 156 times - the same as reducing the flight time from San Francisco to Hong Kong from 13 hours to 5 minutes.
Methodology
Assessing Communication Overhead (was Assessing Cardinality)
For embarrassingly parallel problems, we considered the cardinality of the problem in order to chop the problem up into pieces which can be run on a cluster of finite size. When MPI is used, one needs to consider the constraints of the communication between the nodes participating in the job.
Running on a Single core
There is no particular requirement in the MPI library to use more than one core. So let us get a baseline time measurement by running Tachyon on a single core. Looking at the qsub script below there is now an additional parameter to qsub (-pe orte 1) and the use of mpirun to launch tachyon.
# #$ -cwd #$ -j y #$ -S /bin/bash #$ -N tachyon1 #$ -pe orte 1 tmphosts=`mktemp` awk '{ for (i=0; i < $2; ++i) { print $1} }' $PE_HOSTFILE > $tmphosts echo "Got $NSLOTS slots" echo "jobid $JOB_ID" mpirun -np $NSLOTS -machinefile $tmphosts /mnt/glusterfs/bishopj/tachyon/tachyon/compile/linux-mpi/tachyon +V -aasamples 4 \ -trans_vmd /mnt/glusterfs/bishopj/tachyon/stmvao-white.dat -o /mnt/glusterfs/$USER/stmvao-white_short.$JOB_ID.bmp \ -format BMP -rescale_lights 0.4 -add_skylight 0.9 -skylight_samples 32 -res 1900 1080
$ qsub tachyon.submit
1 core: CPU Information:
Node 0: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Total CPUs: 1 Total Speed: 1.000000 Preprocessing Time: 1.0531 seconds Rendering Progress: 100% complete Ray Tracing Time: 533.7124 seconds Image I/O Time: 0.0754 seconds
Scaling the job up
Change the -pe orte 1 to -pe orte 8 and launch the job again.
$ qsub tachyon.submit
CPU Information:Node 0: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 1: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 2: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 3: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 4: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 5: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 6: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Node 7: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu Total CPUs: 8 Total Speed: 8.000000 Preprocessing Time: 1.2570 seconds Rendering Progress: 100% complete Ray Tracing Time: 76.1758 seconds Image I/O Time: 0.0695 seconds
If we take the 76 second result and calculate how much speedup we observe per core we get 87% (533/76.17)/8 = .87. All of the cores were on the same system system, so 87% would indicate the inter-core protocol efficiency of MPI. It is not 100%, but 87% is not a bad number.
Let's examine what happens when we cross a physical system boundary and need to communicate over ethernet network:
CPU Information:
Node 0: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 1: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 2: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 3: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 4: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 5: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 6: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 7: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 8: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 9: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 10: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 11: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 12: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 13: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 14: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 15: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 16: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 17: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 18: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 19: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 20: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 21: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 22: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 23: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 24: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 25: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 26: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 27: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 28: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 29: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 30: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Node 31: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley03.stanford.edu
Total CPUs: 32
Total Speed: 32.000000
Allocating Image Buffer.
Preprocessing Time: 1.3596 seconds
Rendering Progress: 100% complete
Ray Tracing Time: 21.1898 seconds
Image I/O Time: 0.0761 seconds
As you can see in the Node list, barley01 and barley03 are being used. In this case, our efficiency per core is: (533/21.19)/32 = .78 or 78%. Approximately a 10% hit by going over the 10 gigabit ethernet. However, from a speedup per added core standpoint we are still definitely in the money. Every added core results in a significant speedup.
Let us scale up further, to 208 cores:
# #$ -cwd #$ -j y #$ -S /bin/bash #$ -N tachyon208 #$ -pe orte 208 tmphosts=`mktemp` awk '{ for (i=0; i < $2; ++i) { print $1} }' $PE_HOSTFILE > $tmphosts echo "Got $NSLOTS slots" echo "jobid $JOB_ID" mpirun -np $NSLOTS -machinefile $tmphosts /mnt/glusterfs/bishopj/tachyon/tachyon/compile/linux-mpi/tachyon +V \ -aasamples 4 -trans_vmd /mnt/glusterfs/bishopj/tachyon/stmvao-white.dat \ -o /mnt/glusterfs/$USER/stmvao-white_short.$JOB_ID.bmp -format BMP -rescale_lights 0.4 -add_skylight 0.9 \ -skylight_samples 32 -res 1900 1080
CPU Information:
Node 0: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 1: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 2: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 3: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 4: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 5: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 6: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 7: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 8: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 9: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
Node 10: 1 CPUs, CPU Speed 1.00, Node Speed 1.00 Name: barley01.stanford.edu
.
.
.
Total CPUs: 208
Total Speed: 208.000000
Preprocessing Time: 1.5401 seconds
Rendering Progress: 100% complete
Ray Tracing Time: 3.4819 seconds
Image I/O Time: 0.0680 seconds
Calculating the efficiency, we get (533/3.4)/208 = .75 or 75% speedup per added core. Observe that at 208 cores and 3.4 seconds, the standup and tear down time of the processes themselves is starting to play a large role. I would say this scalability experiment is very successful, having reduced the time to render a single frame from 8.8 minutes to 3.4 seconds, a factor of 156 times.
building Tachyon
Let's see what our options are:
bishopj@corn11:/mnt/glusterfs/bishopj/tachyon/tachyon/unix$ make Choose one of the architectures specified below. -------------------------------------------------------------- Parallel Versions aix-thr - IBM AIX 5.x POSIX Threads aix-64-thr - IBM AIX 5.x POSIX Threads, 64-bit aix-mpi - IBM AIX 5.x (SP) MPI asci-red-mpi - Intel ASCI Red MPI bluegene-mpi - IBM Blue Gene MPI cray-thr - Cray J90,C90... POSIX Threads cray-t3e-mpi - Cray T3E MPI cray-xt3-mpi - Cray XT3 MPI compaq-alphasc-mpi - Lemieux at PSC MPI hpux-thr - HP/UX 11.x POSIX Threads hpux-ia64-thr - HP-UX IA-64, HP C, POSIX Threads irix6-thr - SGI IRIX 6.5.x POSIX Threads irix6-64-thr - SGI IRIX 6.5.x POSIX Threads, 64-bit linux-beowulf-mpi - Scyld Linux MPI linux-alpha-ccc-qsw - Linux Alpha, Compaq C, MPI, QSWnet linux-lam - Linux MPI (OSC LAM) linux-lam-64 - Linux AMD64/EM64T, MPI, 64-bit linux-64-thr - Linux AMD64/EM64T, POSIX Threads, 64-bit linux-mpi - Linux Generic MPI linux-thr - Linux POSIX Threads linux-p4-icc-thr - Linux, Intel C compilers, P4-optimized linux-ia64-thr - Linux IA-64, GCC, POSIX Threads linux-ia64-thr-sgicc - Linux IA-64, SGI Pro64 Compilers macosx-thr - MacOS X PowerPC, POSIX Threads macosx-x86-thr - MacOS X Intel x86, POSIX Threads solaris-ultra-hpc - Sun Solaris 9/10 ClusterTools 4.0 MPI solaris-mpi - Sun Solaris 9/10 MPI (MPICH) solaris-lam - Sun Solaris 9/10 MPI (OSC LAM) solaris-thr - Sun Solaris 9/10 UI/Sun Threads solaris-ultra-thr - Sun Solaris 9/10 UI/Sun Threads, US-1/2 solaris-ultra3-thr - Sun Solaris 9/10 UI/Sun Threads, US-III solaris-64-thr - Sun Solaris 9/10 UI/Sun Threads, 64-bit -------------------------------------------------------------- Hybrid Parallel Versions linux-mpi-thr - Linux Generic MPI+POSIX Threads -------------------------------------------------------------- Sequential Versions aix - IBM AIX 5.x bsd - OpenBSD/FreeBSD/NetBSD hpux - HP/UX 11.x irix6 - SGI Irix 6.x linux - Linux linux-64 - Linux, AMD64/EM64T, GCC 3.x, 64-bit linux-p4-icc - Linux, Intel C compilers, P4-optimized linux-athlon - Linux using GCC 3.x Athlon optimizations linux-p4 - Linux using GCC 3.x P4 optimizations linux-pgcc - Linux, Portland Group Compilers, Pentium linux-athlon-pgcc - Linux, Portland Group Compilers, Athlon linux-ppc - Linux PowerPC linux-ps2 - Linux Sony Playstation 2 linux-alpha - Linux Alpha linux-alpha-ccc - Linux Alpha, Compaq Compilers linux-ia64 - Linux IA-64, GCC linux-ia64-sgicc - Linux IA-64, SGI Pro64 Compilers macosx - MacOS X (aka Darwin, Rhapsody) tru64-alpha - Tru64 Unix, binary can run on AlphaLinux solaris - Sun Solaris 8/9/10 win32 - Windows 95/NT with Cygnus EGCS/CygWin32 -------------------------------------------------------------- OpenGL Runtime Display Versions irix6-thr-ogl - SGI IRIX 6.5.x, POSIX Threads, OpenGL solaris-ultra-thr-ogl - Sun Solaris 9/10 UI/Sun Threads, OpenGL solaris-ultra-hpc-ogl - Sun Solaris 9/10 Sun MPI, OpenGL solaris-64-thr-ogl - Sun Solaris 9/10 UI/Sun Threads, 64-bit linux-thr-ogl - Linux POSIX Threads, OpenGL linux-64-thr-ogl - Linux POSIX Threads, OpenGL linux-lam-64-ogl - Linux, 64-bit AMD64/EM64T, LAM MPI, OpenGL linux-beowulf-mpi-ogl - Scyld Linux with MPI, OpenGL macosx-x86-thr-ogl - MacOS X Intel x86, POSIX Threads, OpenGL tru64-alpha-thr-ogl - Tru64/OSF1/DUnix POSIX Threads, OpenGL -------------------------------------------------------------- Type: 'make arch' to build for an architecture listed above.
We will choose linux-mpi.
bishopj@corn11:/mnt/glusterfs/bishopj/tachyon/tachyon/unix$ make linux-mpi make all \ "ARCH = linux-mpi" \ "CC = mpicc" \ "CFLAGS = -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI " \ "AR = ar" \ "ARFLAGS = r" \ "STRIP = strip" \ "RANLIB = ranlib" \ "LIBS = -L. -ltachyon -lm" make[1]: Entering directory `/mnt/glusterfs/bishopj/tachyon/tachyon/unix' Building Tachyon Parallel Ray Tracing library Copyright 1994-2007, John E. Stone All Rights Reserveed Making architecture directory ../compile/linux-mpi Making library directory ../compile/linux-mpi/libtachyon make ../compile ../compile/linux-mpi ../compile/linux-mpi/libtachyon ../compile/linux-mpi/libtachyon.a ../compile/linux-mpi/tachyon make[2]: Entering directory `/mnt/glusterfs/bishopj/tachyon/tachyon/unix' make[2]: Nothing to be done for `../compile'. make[2]: Nothing to be done for `../compile/linux-mpi'. make[2]: Nothing to be done for `../compile/linux-mpi/libtachyon'. mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/api.c -o ../compile/linux-mpi/libtachyon/api.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/apigeom.c -o ../compile/linux-mpi/libtachyon/apigeom.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/box.c -o ../compile/linux-mpi/libtachyon/box.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/global.c -o ../compile/linux-mpi/libtachyon/global.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/hash.c -o ../compile/linux-mpi/libtachyon/hash.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/parallel.c -o ../compile/linux-mpi/libtachyon/parallel.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/threads.c -o ../compile/linux-mpi/libtachyon/threads.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/camera.c -o ../compile/linux-mpi/libtachyon/camera.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/render.c -o ../compile/linux-mpi/libtachyon/render.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/trace.c -o ../compile/linux-mpi/libtachyon/trace.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/grid.c -o ../compile/linux-mpi/libtachyon/grid.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/intersect.c -o ../compile/linux-mpi/libtachyon/intersect.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/sphere.c -o ../compile/linux-mpi/libtachyon/sphere.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/plane.c -o ../compile/linux-mpi/libtachyon/plane.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/ring.c -o ../compile/linux-mpi/libtachyon/ring.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/triangle.c -o ../compile/linux-mpi/libtachyon/triangle.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/cylinder.c -o ../compile/linux-mpi/libtachyon/cylinder.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/quadric.c -o ../compile/linux-mpi/libtachyon/quadric.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/extvol.c -o ../compile/linux-mpi/libtachyon/extvol.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/vol.c -o ../compile/linux-mpi/libtachyon/vol.o ../src/vol.c: In function 'LoadVol': ../src/vol.c:294:8: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/ui.c -o ../compile/linux-mpi/libtachyon/ui.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/util.c -o ../compile/linux-mpi/libtachyon/util.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/vector.c -o ../compile/linux-mpi/libtachyon/vector.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/shade.c -o ../compile/linux-mpi/libtachyon/shade.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/texture.c -o ../compile/linux-mpi/libtachyon/texture.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/coordsys.c -o ../compile/linux-mpi/libtachyon/coordsys.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/imap.c -o ../compile/linux-mpi/libtachyon/imap.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/light.c -o ../compile/linux-mpi/libtachyon/light.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/imageio.c -o ../compile/linux-mpi/libtachyon/imageio.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/jpeg.c -o ../compile/linux-mpi/libtachyon/jpeg.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/pngfile.c -o ../compile/linux-mpi/libtachyon/pngfile.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/ppm.c -o ../compile/linux-mpi/libtachyon/ppm.o ../src/ppm.c: In function 'readppm': ../src/ppm.c:47:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../src/ppm.c:57:8: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] ../src/ppm.c: In function 'getint': ../src/ppm.c:28:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../src/ppm.c:30:14: warning: ignoring return value of 'fgets', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/psd.c -o ../compile/linux-mpi/libtachyon/psd.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/sgirgb.c -o ../compile/linux-mpi/libtachyon/sgirgb.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/tgafile.c -o ../compile/linux-mpi/libtachyon/tgafile.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -c ../src/winbmp.c -o ../compile/linux-mpi/libtachyon/winbmp.o rm -f ../compile/linux-mpi/libtachyon.a ar r ../compile/linux-mpi/libtachyon.a ../compile/linux-mpi/libtachyon/api.o ../compile/linux-mpi/libtachyon/apigeom.o ../compile/linux-mpi/libtachyon/box.o ../compile/linux-mpi/libtachyon/global.o ../compile/linux-mpi/libtachyon/hash.o ../compile/linux-mpi/libtachyon/parallel.o ../compile/linux-mpi/libtachyon/threads.o ../compile/linux-mpi/libtachyon/camera.o ../compile/linux-mpi/libtachyon/render.o ../compile/linux-mpi/libtachyon/trace.o ../compile/linux-mpi/libtachyon/grid.o ../compile/linux-mpi/libtachyon/intersect.o ../compile/linux-mpi/libtachyon/sphere.o ../compile/linux-mpi/libtachyon/plane.o ../compile/linux-mpi/libtachyon/ring.o ../compile/linux-mpi/libtachyon/triangle.o ../compile/linux-mpi/libtachyon/cylinder.o ../compile/linux-mpi/libtachyon/quadric.o ../compile/linux-mpi/libtachyon/extvol.o ../compile/linux-mpi/libtachyon/vol.o ../compile/linux-mpi/libtachyon/ui.o ../compile/linux-mpi/libtachyon/util.o ../compile/linux-mpi/libtachyon/vector.o ../compile/linux-mpi/libtachyon/shade.o ../compile/linux-mpi/libtachyon/texture.o ../compile/linux-mpi/libtachyon/coordsys.o ../compile/linux-mpi/libtachyon/imap.o ../compile/linux-mpi/libtachyon/light.o ../compile/linux-mpi/libtachyon/imageio.o ../compile/linux-mpi/libtachyon/jpeg.o ../compile/linux-mpi/libtachyon/pngfile.o ../compile/linux-mpi/libtachyon/ppm.o ../compile/linux-mpi/libtachyon/psd.o ../compile/linux-mpi/libtachyon/sgirgb.o ../compile/linux-mpi/libtachyon/tgafile.o ../compile/linux-mpi/libtachyon/winbmp.o ar: creating ../compile/linux-mpi/libtachyon.a ranlib ../compile/linux-mpi/libtachyon.a mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/main.c -o ../compile/linux-mpi/libtachyon/main.o ../demosrc/main.c: In function 'animate_scene': ../demosrc/main.c:392:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/getargs.c -o ../compile/linux-mpi/libtachyon/getargs.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/parse.c -o ../compile/linux-mpi/libtachyon/parse.o ../demosrc/parse.c:1468:16: warning: 'GetSphereArray' defined but not used [-Wunused-function] ../demosrc/parse.c: In function 'GetTexBody': ../demosrc/parse.c:794:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:798:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:802:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:806:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:809:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:811:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:815:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:819:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:821:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:822:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:826:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:837:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:839:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:840:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:854:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:862:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:885:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:895:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:909:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetString': ../demosrc/parse.c:212:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'PrintSyntaxError': ../demosrc/parse.c:189:10: warning: ignoring return value of 'fread', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'readmodel': ../demosrc/parse.c:242:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetScenedefs': ../demosrc/parse.c:321:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetObject': ../demosrc/parse.c:592:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetTexture': ../demosrc/parse.c:765:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetVCSTri': ../demosrc/parse.c:1444:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1450:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1456:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetVertexArray': ../demosrc/parse.c:1560:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1566:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1568:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1578:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1580:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1598:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1638:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1705:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1766:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetSphere': ../demosrc/parse.c:1279:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetFCylinder': ../demosrc/parse.c:1230:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetRing': ../demosrc/parse.c:1356:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1358:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetPolyCylinder': ../demosrc/parse.c:1248:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1257:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetCylinder': ../demosrc/parse.c:1201:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetVol': ../demosrc/parse.c:1318:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1320:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetImageDef': ../demosrc/parse.c:665:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:689:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetTexDef': ../demosrc/parse.c:743:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetTexAlias': ../demosrc/parse.c:753:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:754:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetLight': ../demosrc/parse.c:983:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:986:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:988:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1000:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1003:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1006:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetColor': ../demosrc/parse.c:650:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetDirLight': ../demosrc/parse.c:956:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:958:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetSkyLight': ../demosrc/parse.c:1028:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1031:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetSpotLight': ../demosrc/parse.c:1054:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1060:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1063:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1066:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1068:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1079:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1082:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1085:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetLandScape': ../demosrc/parse.c:1790:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1793:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetShaderMode': ../demosrc/parse.c:334:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:349:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:358:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:377:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:380:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:383:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetCamera': ../demosrc/parse.c:404:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:406:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:415:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:418:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:426:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:429:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:437:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:441:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:444:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:447:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:453:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:459:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:467:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:469:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:471:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetTPolyFile': ../demosrc/parse.c:1835:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1845:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetBackGnd': ../demosrc/parse.c:1135:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetBackGndGradient': ../demosrc/parse.c:1152:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1166:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1169:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1172:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1175:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1178:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c: In function 'GetFog': ../demosrc/parse.c:1103:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1115:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1118:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/parse.c:1121:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/nffparse.c -o ../compile/linux-mpi/libtachyon/nffparse.o ../demosrc/nffparse.c: In function 'NFFGetPatch': ../demosrc/nffparse.c:246:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetPolygon': ../demosrc/nffparse.c:227:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetSphere': ../demosrc/nffparse.c:215:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetCylCone': ../demosrc/nffparse.c:193:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c:196:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetTexture': ../demosrc/nffparse.c:171:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetLight': ../demosrc/nffparse.c:157:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetBackground': ../demosrc/nffparse.c:138:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetScenedefs': ../demosrc/nffparse.c:109:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c:114:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c:117:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetVector': ../demosrc/nffparse.c:59:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/nffparse.c: In function 'NFFGetString': ../demosrc/nffparse.c:47:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/glwin.c -o ../compile/linux-mpi/libtachyon/glwin.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/spaceball.c -o ../compile/linux-mpi/libtachyon/spaceball.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/trackball.c -o ../compile/linux-mpi/libtachyon/trackball.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/mgfparse.c -o ../compile/linux-mpi/libtachyon/mgfparse.o mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -c ../demosrc/ac3dparse.c -o ../compile/linux-mpi/libtachyon/ac3dparse.o ../demosrc/ac3dparse.c: In function 'ParseAC3D': ../demosrc/ac3dparse.c:105:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c: In function 'GetMaterial': ../demosrc/ac3dparse.c:207:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:210:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:217:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:221:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:224:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:228:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:231:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c: In function 'GetString': ../demosrc/ac3dparse.c:82:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c: In function 'GetRecurseObject': ../demosrc/ac3dparse.c:398:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:399:9: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:402:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:405:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:406:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:409:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:410:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:413:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:414:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:419:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:422:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:426:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:428:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:433:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:436:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:447:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:448:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:452:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:457:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:467:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:475:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:478:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:479:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:492:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:497:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:500:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:501:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:504:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:510:15: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:542:13: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] ../demosrc/ac3dparse.c:566:11: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] mpicc -Wall -O3 -fomit-frame-pointer -ffast-math -DLinux -DMPI -I../src -I../demosrc -o ../compile/linux-mpi/tachyon ../compile/linux-mpi/libtachyon/main.o ../compile/linux-mpi/libtachyon/getargs.o ../compile/linux-mpi/libtachyon/parse.o ../compile/linux-mpi/libtachyon/nffparse.o ../compile/linux-mpi/libtachyon/glwin.o ../compile/linux-mpi/libtachyon/spaceball.o ../compile/linux-mpi/libtachyon/trackball.o ../compile/linux-mpi/libtachyon/mgfparse.o ../compile/linux-mpi/libtachyon/ac3dparse.o -L../compile/linux-mpi -L. -ltachyon -lm strip ../compile/linux-mpi/tachyon make[2]: Leaving directory `/mnt/glusterfs/bishopj/tachyon/tachyon/unix' Build Complete make[1]: Leaving directory `/mnt/glusterfs/bishopj/tachyon/tachyon/unix'
The important thing to look for is if the build is using mpicc (or mpif90 for fortran90). It did, and the build was successful
