error while compling ROI Align

[guyan277]

creating home/guyan/tmp/frrcnn/lib/model/roi_align
creating home/guyan/tmp/frrcnn/lib/model/roi_align/src
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -DWITH_CUDA -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include/TH -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include/THC -I/usr/local/cuda/include -I/home/guyan/anaconda3/envs/Maxwell2/include/python2.7 -c _roi_align.c -o ./_roi_align.o
gcc -pthread -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -fPIC -DWITH_CUDA -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include/TH -I/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/../../lib/include/THC -I/usr/local/cuda/include -I/home/guyan/anaconda3/envs/Maxwell2/include/python2.7 -c /home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c -o ./home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.o
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c: In function ‘roi_align_backward’:
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:65:9: warning: unused variable ‘batch_size’ [-Wunused-variable]
int batch_size = THFloatTensor_size(bottom_grad, 0);
^
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignForwardCpu’:
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:87:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:88:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:88:5: note: use option -std=c99 or -std=gnu99 to compile your code
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignBackwardCpu’:
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:145:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/guyan/tmp/frrcnn/lib/model/roi_align/src/roi_align.c:146:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
Traceback (most recent call last):
File "build.py", line 38, in
ffi.build()
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/init.py", line 164, in build
_build_extension(ffi, cffi_wrapper_name, target_dir, verbose)
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/torch/utils/ffi/init.py", line 100, in _build_extension
ffi.compile(tmpdir=tmpdir, verbose=verbose, target=libname)
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/cffi/api.py", line 684, in compile
compiler_verbose=verbose, debug=debug, **kwds)
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/cffi/recompiler.py", line 1484, in recompile
compiler_verbose, debug)
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/cffi/ffiplatform.py", line 20, in compile
outputfilename = _build(tmpdir, ext, compiler_verbose, debug)
File "/home/guyan/anaconda3/envs/Maxwell2/lib/python2.7/site-packages/cffi/ffiplatform.py", line 56, in _build
raise VerificationError('%s: %s' % (e.class.name, e))
cffi.error.VerificationError: CompileError: command 'gcc' failed with exit status 1

[jwyang]

Hi, @guyan277 I guess it is because your gcc version does not support the compile.

[guyan277]

Thx @jwyang i will check it

[WBinke]

I met the same problem,could you tell me what is your gcc version?Mine is 4.84.Thanks! @jwyang

[jwyang]

Hi, @WBinke it is gcc 5.4.0

[liuhyCV]

Thx! I have the same problem like it. The reason is: Ubuntu 14 gcc version = 4.8, need to update to 5.4.

sudo add-apt-repository ppa:ubuntu-toolchain-r/test
sudo apt-get update
sudo apt-get install gcc-5 g++-5

sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-5 60 --slave /usr/bin/g++ g++ /usr/bin/g++-5

Then can be complier sucessfully

[liuhyCV]

I have alse meet the error:
ImportError:pytorch-faster-rcnn/tools/../lib/nms/_ext/nms/_nms.so: undefined symbol: state
the same error in: undefined symbol: state
and refered some explanatioin "ImportError: undefined symbol: state" -- since last upgrade

so I also upgrade the pytorch version to 0.2.0_post3 and
recompiled it, the problem is solved.

[ksaito-ut]

Hi, I meet a similar error when compiling roi align. I updated the version of gcc, but the error was not solved. How can I fix it ? Thanks in advance.

File "build.py", line 38, in
ffi.build()
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/torch/utils/ffi/init.py", line 167, in build
_build_extension(ffi, cffi_wrapper_name, target_dir, verbose)
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/torch/utils/ffi/init.py", line 103, in _build_extension
ffi.compile(tmpdir=tmpdir, verbose=verbose, target=libname)
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/cffi/api.py", line 697, in compile
compiler_verbose=verbose, debug=debug, **kwds)
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/cffi/recompiler.py", line 1520, in recompile
compiler_verbose, debug)
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 22, in compile
outputfilename = _build(tmpdir, ext, compiler_verbose, debug)
File "/home/mil/ksaito/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 58, in _build
raise VerificationError('%s: %s' % (e.class.name, e))
cffi.error.VerificationError: CompileError: command 'x86_64-linux-gnu-gcc' failed with exit status 1

[chj1933]

@ksaito-ut Hi, I meet a similar error when compiling roi align. I updated the version of gcc, but the error was not solved. How can I fix it ? Thanks in advance.
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:87:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:87:5: note: use option -std=c99 or -std=gnu99 to compile your code
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignBackwardCpu’:
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:143:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:144:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
Traceback (most recent call last):
File "build.py", line 38, in
ffi.build()
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 167, in build
_build_extension(ffi, cffi_wrapper_name, target_dir, verbose)
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 103, in _build_extension
ffi.compile(tmpdir=tmpdir, verbose=verbose, target=libname)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/api.py", line 697, in compile
compiler_verbose=verbose, debug=debug, **kwds)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/recompiler.py", line 1520, in recompile
compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 22, in compile
outputfilename = _build(tmpdir, ext, compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 58, in _build
raise VerificationError('%s: %s' % (e.class.name, e))
cffi.error.VerificationError: CompileError: command 'x86_64-linux-gnu-gcc' failed with exit status 1

[chj1933]

@guyan277 I have solved this by
int idx;
for (idx = 0; idx < output_size; ++idx)
but appear
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignForwardCpu’:
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:86:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:14: error: redeclaration of ‘idx’ with no linkage
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:87:9: note: previous declaration of ‘idx’ was here
int idx;
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:5: note: use option -std=c99 or -std=gnu99 to compile your code
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignBackwardCpu’:
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:144:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:146:14: error: redeclaration of ‘idx’ with no linkage
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:145:9: note: previous declaration of ‘idx’ was here
int idx;
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:146:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
Traceback (most recent call last):
File "build.py", line 38, in
ffi.build()
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 167, in build
_build_extension(ffi, cffi_wrapper_name, target_dir, verbose)
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 103, in _build_extension
ffi.compile(tmpdir=tmpdir, verbose=verbose, target=libname)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/api.py", line 697, in compile
compiler_verbose=verbose, debug=debug, **kwds)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/recompiler.py", line 1520, in recompile
compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 22, in compile
outputfilename = _build(tmpdir, ext, compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 58, in _build
raise VerificationError('%s: %s' % (e.class.name, e))
cffi.error.VerificationError: CompileError: command 'x86_64-linux-gnu-gcc' failed with exit status 1
for (idx = 0; idx < output_size; ++idx)
but appear
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignForwardCpu’:
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:86:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:14: error: redeclaration of ‘idx’ with no linkage
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:87:9: note: previous declaration of ‘idx’ was here
int idx;
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:88:5: note: use option -std=c99 or -std=gnu99 to compile your code
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c: In function ‘ROIAlignBackwardCpu’:
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:144:0: warning: ignoring #pragma omp parallel [-Wunknown-pragmas]
#pragma omp parallel for
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:146:14: error: redeclaration of ‘idx’ with no linkage
for (int idx = 0; idx < output_size; ++idx)
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:145:9: note: previous declaration of ‘idx’ was here
int idx;
^
/home/chenghj/faster-rcnn.pytorch/lib/model/roi_align/src/roi_align.c:146:5: error: ‘for’ loop initial declarations are only allowed in C99 mode
for (int idx = 0; idx < output_size; ++idx)
^
Traceback (most recent call last):
File "build.py", line 38, in
ffi.build()
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 167, in build
_build_extension(ffi, cffi_wrapper_name, target_dir, verbose)
File "/usr/local/lib/python2.7/dist-packages/torch/utils/ffi/init.py", line 103, in _build_extension
ffi.compile(tmpdir=tmpdir, verbose=verbose, target=libname)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/api.py", line 697, in compile
compiler_verbose=verbose, debug=debug, **kwds)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/recompiler.py", line 1520, in recompile
compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 22, in compile
outputfilename = _build(tmpdir, ext, compiler_verbose, debug)
File "/home/chenghj/.local/lib/python2.7/site-packages/cffi/ffiplatform.py", line 58, in _build
raise VerificationError('%s: %s' % (e.class.name, e))
cffi.error.VerificationError: CompileError: command 'x86_64-linux-gnu-gcc' failed with exit status 1

[WBinke]

Check your x86_64-linux-gnu-gcc version,maybe its verion is still 4.8,beacause it is a softlink.Just check it. @ksaito-ut @chj1933

[ksaito-ut]

@WBinke Thank you for your advice! I checked my x86_64-linux-gnu-gcc version and found it was still 4.8. So, I changed the link to x86_64-linux-gnu-gcc-5. It worked!

[inkawhich]

export CXXFLAGS="-std=c++11"
export CFLAGS="-std=c99"

[jwyang]

cheers you solved the problem, closing this issue.