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Adapt to cuda version found #54

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ab2d64f
added experimental code for adapting CUDA_CPPFLAGS to cuda release ve…
Jul 25, 2016
0c3b9c5
added autoconf code to adapt CUDA_CPPFLAGS to found cuda version (not…
Jul 25, 2016
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47 changes: 40 additions & 7 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -222,13 +222,46 @@ AS_IF([test "x$with_cuda" != xno],
AS_IF([test "x$with_cuda" = xyes],
[AS_IF([test "x$CUDA_CPPFLAGS" = x],
[dnl generate CUDA code for broad spectrum of devices
dnl Note: cc 13 for Tesla
dnl Note: cc 20 for Fermi
dnl Note: cc 30 for Kepler
CUDA_CPPFLAGS=["-gencode=arch=compute_12,code=sm_12 \
-gencode=arch=compute_13,code=sm_13 \
-gencode=arch=compute_20,code=sm_20 \
-gencode=arch=compute_20,code=compute_20"]

nvcc_version=[`nvcc --version 2>&1 |sed -e '/release/s/.* \(@<:@0-9@:>@\+\.@<:@0-9@:>@\+\).*/\1/p' -n`]
nvcc_major_version=[`nvcc --version 2>&1 |sed -e '/release/s/.*release \(@<:@0-9@:>@\+\)\.@<:@0-9@:>@\+.*/\1/p' -n`]
nvcc_minor_version=[`nvcc --version 2>&1 |sed -e '/release/s/.*release @<:@0-9@:>@\+\.\(@<:@0-9@:>@\+\).*/\1/p' -n`]

AC_MSG_NOTICE([detected CUDA release $nvcc_major_version.$nvcc_minor_version])

dnl Note: cc 1x for Tesla
dnl Note: cc 2x for Fermi
dnl Note: cc 3x for Kepler
dnl Note: cc 5x for Maxwell
dnl Note: cc 6x for Pascal
cuda_compute_1x=["-gencode arch=compute_10,code=sm_10 -gencode arch=compute_12,code=sm_12"]
cuda_compute_2x=["-gencode arch=compute_20,code=sm_20"]
cuda_compute_30=["-gencode arch=compute_30,code=sm_30 -gencode arch=compute_35,code=sm_35"]
cuda_compute_37=["-gencode arch=compute_37,code=sm_37"]
cuda_compute_3x=["$cuda_compute_30 $cuda_compute_37"]
cuda_compute_50=["-gencode arch=compute_50,code=sm_50"]
cuda_compute_5x=["-gencode arch=compute_50,code=sm_50 -gencode arch=compute_52,code=sm_52"]
cuda_compute_6x=["-gencode arch=compute_60,code=sm_60 -gencode arch=compute_61,code=sm_61 -gencode arch=compute_62,code=sm_62"]

CUDA_GENCODE_FLAGS=[]
AS_IF([test $nvcc_major_version -lt "6"],
[CUDA_GENCODE_FLAGS="$cuda_compute_1x $cuda_compute_2x $cuda_compute_30"],
[]
)
AS_IF([test $nvcc_major_version -ge "6"],
[CUDA_GENCODE_FLAGS="$cuda_compute_2x $cuda_compute_3x $cuda_compute_50"],
[]
)
AS_IF([test $nvcc_major_version -ge "7"],
[CUDA_GENCODE_FLAGS="$cuda_compute_2x $cuda_compute_3x $cuda_compute_5x"],
[]
)
AS_IF([test $nvcc_major_version -eq "8"],
[CUDA_GENCODE_FLAGS="$cuda_compute_2x $cuda_compute_3x $cuda_compute_5x $cuda_compute_6x"],
[]
)
CUDA_CPPFLAGS=$CUDA_GENCODE_FLAGS

AC_MSG_NOTICE([using CUDA_CPPFLAGS=$CUDA_CPPFLAGS])
AC_MSG_WARN([*** SHOC programs may fail if these -gencode values do not apply to your GPU. If they don't apply, or if you want to shorten SHOC's compile time, determine the -gencode options that apply for your GPU and re-configure SHOC explicitly specifying only those options in CUDA_CPPFLAGS during the configure. ***])
]
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