Installation error: ‘memcpy’ was not declared in this scope

ken_zhang · May 10, 2017, 10:01am

Maybe you can follow this disscussion:

Ubuntu 16.04 - torch installation failure

opened 09:45PM - 25 Aug 16 UTC

Hi, I am following these instructions: http://torch.ch/docs/getting-started.htm…l and I get this on the final command: ``` /usr/include/string.h: In function ‘void* __mempcpy_inline(void*, const void*, size_t)’: /usr/include/string.h:652:42: error: ‘memcpy’ was not declared in this scope return (char *) memcpy (__dest, __src, __n) + __n; ^ CMake Error at THC_generated_THCBlas.cu.o.cmake:267 (message): Error generating file /home/shriphani/torch/extra/cutorch/build/lib/THC/CMakeFiles/THC.dir//./THC_generated_THCBlas.cu.o lib/THC/CMakeFiles/THC.dir/build.make:70: recipe for target 'lib/THC/CMakeFiles/THC.dir/THC_generated_THCBlas.cu.o' failed make[2]: *** [lib/THC/CMakeFiles/THC.dir/THC_generated_THCBlas.cu.o] Error 1 make[2]: *** Waiting for unfinished jobs.... /usr/include/string.h: In function ‘void* __mempcpy_inline(void*, const void*, size_t)’: /usr/include/string.h:652:42: error: ‘memcpy’ was not declared in this scope return (char *) memcpy (__dest, __src, __n) + __n; ^ ``` Is there a simple workaround? Thanks, S.

In my case, I am using Ubuntu 16.04 and CUDA 7.5 and I add -D_FORCE_INLINES in CXXFLAGS in file torch/lib/nccl/Makefile.

@shiningsurya @ywu36