Create a new file and call it whatever (like test.c), then try to compile it.  
This is just to check if the compiler works outside of Theano.

I’ve added sample content so that the file has valid C code.

> Le 11 avr. 2018 à 17:07, Qinpeng Wang <wqp.gat...@gmail.com> a écrit :
> 
> Hi, Arnaud, 
> 
> Thanks for your reply! I believe currently I rely on the gcc from 
> m2w64-toolchain package, installed via conda.
> Where can I find this file "test.c", and how can I compile with your code?
> 
> Thanks!
> 
> On Wednesday, April 11, 2018 at 12:18:56 PM UTC-5, Arnaud Bergeron wrote:
> It seems like the gcc in anaconda has trouble when installed in a path with 
> spaces:
> 
> Can you copy this to 'test.c':
> 
> int main() {
>     return 1;
> }
> 
> and try to compile with:
> 
> g++ test.c -o test
> 
> 
>> Le 10 avr. 2018 à 17:19, Qinpeng Wang <wqp.g...@ <>gmail.com 
>> <http://gmail.com/>> a écrit :
>> 
>> Hi, Arnaud, 
>> 
>> Thanks for your reply! I reinstalled CUDA, copied cudnn files in the cuda 
>> directory, and removed the two parameters. However, I got the same errors 
>> from my first post:
>> 
>> ERROR (theano.gpuarray): Could not initialize pygpu, support disabled
>> Traceback (most recent call last):
>>   File "C:\Program 
>> Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", line 
>> 227, in <module>
>>     use(config.device)
>>   File "C:\Program 
>> Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", line 
>> 214, in use
>>     init_dev(device, preallocate=preallocate)
>>   File "C:\Program 
>> Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", line 
>> 121, in init_dev
>>     dnn.dnn_available.msg)
>> RuntimeError: You enabled cuDNN, but we aren't able to use it: cannot 
>> compile with cuDNN. We got this error:
>> b'C:/Program 
>> Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>  cannot find C:/Program: No such file or directory
>> C:/Program 
>> Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>  cannot find 
>> Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/lib/../lib/default-manifest.o:
>>  No such file or directory
>> collect2.exe: error: ld returned 1 exit status'
>> 
>> Any other suggestion you have?
>> 
>> Thanks!
>> 
>> 
>> On Tuesday, April 10, 2018 at 12:45:59 PM UTC-5, Arnaud Bergeron wrote:
>> 
>> 
>>> Le 3 avr. 2018 à 12:01, Qinpeng Wang <wqp.g...@gmail.com <>> a écrit :
>>> 
>>> Hi Pascal, 
>>> 
>>> I have CUDA installed a while ago when I was still using the old GPU 
>>> backend at C:\Program Files\NVIDIA GPU Computing Toolkit, then I copied the 
>>> CUDA folder to C root. 
>> 
>> This most likely broke DLL registrations.  Please don't do that.
>> 
>> If you reinstall cuda in its original location, put the cudnn files in the 
>> cuda directory and remove these two parameters in your theanorc file:
>> include_path=C:/CUDA/v7.5/include
>> library_path=C:/CUDA/v7.5/lib/x64
>> It should work again.
>> 
>> ---
>> 
>> I you really want to try with the current setup, you can try to set this
>> base_path=C:/CUDA/v7.5
>> Instead of the two above, but I'm pretty sure that will still break on the 
>> cuda DLLs.
>> 
>> 
>> 
>>> Then I installed cuDNN by copying unzipped files into corresponding folders 
>>> inside CUDA folder. I'm using CUDA 7.5 and cuDNN 6.0 (Windows7). See my 
>>> theanoc file in my original post to make sure I have pointed theano to the 
>>> right location. 
>>> Yes this error is not related to Idflags.
>>> 
>>> Thanks!
>>> 
>>> On Tuesday, April 3, 2018 at 9:59:38 AM UTC-5, Pascal Lamblin wrote:
>>> This is a completely different error message. 
>>> This one has to do with cuDNN, not BLAS or MKL. 
>>> 
>>> Where have you installed cuDNN? 
>>> Does _that_ error still happen when you do not ldflags? 
>>> 
>>> On 2018-04-03 10:46 AM, Qinpeng Wang wrote: 
>>> > Hi Pascal, 
>>> > 
>>> > Thanks for your reply! 
>>> > I have "mkl-service" package installed via conda (I have versions of 
>>> > installed libraries in my original post), but somehow theano is unable 
>>> > to locate the BLAS library automatically, hence the warning message. 
>>> > Since the "gcc-v" output seems reasonable, could you please help me 
>>> > figure out how to get rid of the error message in my original post? I 
>>> > attach it here again for your convenience. 
>>> > 
>>> > When I run: 
>>> > |python -c "import theano"| 
>>> > 
>>> > I get this message: 
>>> > 
>>> > |ERROR (theano.gpuarray): Could not initialize pygpu, support disabled 
>>> > Traceback (most recent call last): File "C:\Program 
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> > line 227, in <module> use(config.device) File "C:\Program 
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> > line 214, in use init_dev(device, preallocate=preallocate) File 
>>> > "C:\Program 
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> > line 121, in init_dev dnn.dnn_available.msg) RuntimeError: You enabled 
>>> > cuDNN, but we aren't able to use it: cannot compile with cuDNN. We got 
>>> > this error: b'C:/Program 
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> >  
>>> > cannot find C:/Program: No such file or directory C:/Program 
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> >  
>>> > cannot find 
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/lib/../lib/default-manifest.o:
>>> >  
>>> > No such file or directory collect2.exe: error: ld returned 1 exit status' 
>>> > | 
>>> > 
>>> > 
>>> > Thanks! 
>>> > 
>>> > 
>>> > On Tuesday, April 3, 2018 at 9:28:37 AM UTC-5, Pascal Lamblin wrote: 
>>> > 
>>> >     On 2018-03-30 11:16 PM, Qinpeng Wang wrote: 
>>> >      > Hi Pascal, 
>>> >      > 
>>> >      > Thanks for your reply!! Indeed I wasn't really sure how to set the 
>>> >      > ldflags parameter, but if I don't have this line, I get this 
>>> > warning 
>>> >      > message: 
>>> >      > 
>>> >      > WARNING (theano.tensor.blas): Using NumPy C-API based 
>>> >     implementation for 
>>> >      > BLAS functions. 
>>> > 
>>> >     This is just a warning, the worse issue would be a slight slow down 
>>> > in 
>>> >     some CPU operations. 
>>> > 
>>> >      > After inspecting theano/tensor/blas_headers.py 
>>> >      > 
>>> >     
>>> > <https://github.com/Theano/Theano/blob/82a3ec977b7c8630d92871e70d62e5a2c52cea62/theano/tensor/blas_headers.py
>>> >  
>>> > <https://github.com/Theano/Theano/blob/82a3ec977b7c8630d92871e70d62e5a2c52cea62/theano/tensor/blas_headers.py>
>>> >  
>>> >     
>>> > <https://github.com/Theano/Theano/blob/82a3ec977b7c8630d92871e70d62e5a2c52cea62/theano/tensor/blas_headers.py
>>> >  
>>> > <https://github.com/Theano/Theano/blob/82a3ec977b7c8630d92871e70d62e5a2c52cea62/theano/tensor/blas_headers.py>>>,
>>> >  
>>> > 
>>> >      > I found the following: 
>>> >      > 
>>> >      > |if not config.blas.ldflags: logger.warning('Using NumPy C-API 
>>> > based 
>>> >      > implementation for BLAS functions.')| 
>>> >      > 
>>> >      > So I realize I may have to have ldflags in the theaorc file to 
>>> >     get rid 
>>> >      > of this warning message. *How to set ldflags correctly?* 
>>> > 
>>> >     These flags are for specifying where an optimized BLAS library is, 
>>> > when 
>>> >     it is not found automatically. 
>>> >     If you do not have an optimized BLAS library installed, then it 
>>> > should 
>>> >     stay empty. 
>>> > 
>>> >     Did you install the "mkl-service" package in conda? 
>>> >     This is usually the easiest way to install an optimized BLAS that 
>>> > will 
>>> >     be automatically found. 
>>> > 
>>> >      > I was asking around what the correct output of "gcc -v" would 
>>> >     look like, 
>>> >      > but have not got any reply yet, here it is: 
>>> > 
>>> >     This seems reasonable. 
>>> > 
>>> >      > 
>>> >      > |Using built-in specs. COLLECT_GCC=gcc 
>>> >     COLLECT_LTO_WRAPPER=C:/Program\ 
>>> >      > 
>>> >     
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/lto-wrapper.exe
>>> >  
>>> > 
>>> >      > Target: x86_64-w64-mingw32 Configured with: ../gcc-5.3.0/configure 
>>> >      > --prefix=/mingw64 --with-local-prefix=/mingw64/local 
>>> >      > --build=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 
>>> >      > --target=x86_64-w64-mingw32 
>>> >      > 
>>> > --with-native-system-header-dir=/mingw64/x86_64-w64-mingw32/include 
>>> >      > --libexecdir=/mingw64/lib 
>>> >      > --with-gxx-include-dir=/mingw64/include/c++/5.3.0 
>>> > --enable-bootstrap 
>>> >      > --with-arch=x86-64 --with-tune=generic 
>>> >      > --enable-languages=c,lto,c++,objc,obj-c++,fortran,ada 
>>> >     --enable-shared 
>>> >      > --enable-static --enable-libatomic --enable-threads=posix 
>>> >      > --enable-graphite --enable-fully-dynamic-string 
>>> >      > --enable-libstdcxx-time=yes --disable-libstdcxx-pch 
>>> >      > --disable-libstdcxx-debug --enable-version-specific-runtime-libs 
>>> >      > --disable-isl-version-check --enable-lto --enable-libgomp 
>>> >      > --disable-multilib --enable-checking=release --disable-rpath 
>>> >      > --disable-win32-registry --disable-nls --disable-werror 
>>> >      > --disable-symvers --with-libiconv --with-system-zlib 
>>> >     --with-gmp=/mingw64 
>>> >      > --with-mpfr=/mingw64 --with-mpc=/mingw64 --with-isl=/mingw64 
>>> >      > --with-pkgversion='Rev5, Built by MSYS2 project' 
>>> >      > --with-bugurl=https://sourceforge.net/projects/msys2 
>>> > <https://sourceforge.net/projects/msys2> 
>>> >     <https://sourceforge.net/projects/msys2 
>>> > <https://sourceforge.net/projects/msys2>> --with-gnu-as 
>>> >      > --with-gnu-ld Thread model: posix gcc version 5.3.0 (Rev5, Built 
>>> > by 
>>> >      > MSYS2 project)| 
>>> >      > 
>>> >      > 
>>> >      > Lastly, I have restarted the computer, the error message stayed 
>>> >     the same. 
>>> >      > 
>>> >      > Thank you so much! 
>>> >      > 
>>> >      > On Friday, March 30, 2018 at 9:38:11 PM UTC-5, Pascal Lamblin 
>>> > wrote: 
>>> >      > 
>>> >      >     Your "ldflags" option in the "[blas]" section is not correct, 
>>> >     it should 
>>> >      >     at least start with -I or -l, and there should be quotation 
>>> >     marks 
>>> >      >     around 
>>> >      >     the path since there is a space in "Program Files". 
>>> >      > 
>>> >      >     What happens if you do not include this line in the .theanorc? 
>>> >      > 
>>> >      >     Are you able to run `gcc -v` from inside the conda env, and 
>>> >     what is the 
>>> >      >     output? 
>>> >      > 
>>> >      >     Also, it may seem stupid, but have you restarted your 
>>> >     computer, or at 
>>> >      >     least the terminal, since you installed m2w64-toolchain? 
>>> >      > 
>>> >      >     On 2018-03-30 01:27 PM, Qinpeng Wang wrote: 
>>> >      >      > Hi, all, 
>>> >      >      > 
>>> >      >      > 
>>> >      >      > I'm trying to setup theano 1.0.1 with CUDA 7.5 and cuDNN 
>>> > 6.0 
>>> >      >     (Windows7). 
>>> >      >      > I created a new virtual environment with conda and 
>>> > installed 
>>> >      >     required 
>>> >      >      > libraries like this: 
>>> >      >      > 
>>> >      >      > |conda install numpy scipy mkl-service libpython 
>>> >     m2w64-toolchain 
>>> >      >     conda 
>>> >      >      > install theano pygpu | 
>>> >      >      > 
>>> >      >      > Here are versions of major relavant libraries: 
>>> >      >      > 
>>> >      >      > |theano 1.0.1 python 3.5.5 numpy 1.14.2 scipy 1.0.0 
>>> >      >     m2w64-toolchain 5.3.0 
>>> >      >      > mkl-service 1.1.2 pygpu 0.7.5 libgpuarray 0.7.5 libpython 
>>> >     2.1 mkl 
>>> >      >     2018.0.2 | 
>>> >      >      > 
>>> >      >      > The way I installed cuDNN is to copy files into 
>>> > corresponding 
>>> >      >     folders 
>>> >      >      > inside CUDA folder. Originally I installed CUDA at 
>>> > C:\Program 
>>> >      >      > Files\NVIDIA GPU Computing Toolkit, then I copied the CUDA 
>>> >     folder 
>>> >      >     to C root. 
>>> >      >      > 
>>> >      >      > When I run: 
>>> >      >      > |python -c "import theano"| 
>>> >      >      > 
>>> >      >      > I get this message: 
>>> >      >      > 
>>> >      >      > |ERROR (theano.gpuarray): Could not initialize pygpu, 
>>> > support 
>>> >      >     disabled 
>>> >      >      > Traceback (most recent call last): File "C:\Program 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> >      >      > line 227, in <module> use(config.device) File "C:\Program 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> >      >      > line 214, in use init_dev(device, preallocate=preallocate) 
>>> >     File 
>>> >      >      > "C:\Program 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files\Anaconda3\envs\te\lib\site-packages\theano\gpuarray\__init__.py", 
>>> >      >      > line 121, in init_dev dnn.dnn_available.msg) RuntimeError: 
>>> >     You 
>>> >      >     enabled 
>>> >      >      > cuDNN, but we aren't able to use it: cannot compile with 
>>> >     cuDNN. 
>>> >      >     We got 
>>> >      >      > this error: b'C:/Program 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> >  
>>> > 
>>> >      > 
>>> >      >      > cannot find C:/Program: No such file or directory 
>>> > C:/Program 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe:
>>> >  
>>> > 
>>> >      > 
>>> >      >      > cannot find 
>>> >      >      > 
>>> >      >     
>>> >     
>>> > Files/Anaconda3/envs/te/Library/mingw-w64/bin/../lib/gcc/x86_64-w64-mingw32/5.3.0/../../../../x86_64-w64-mingw32/lib/../lib/default-manifest.o:
>>> >  
>>> > 
>>> >      > 
>>> >      >      > No such file or directory collect2.exe: error: ld returned 
>>> >     1 exit 
>>> >      >     status' | 
>>> >      >      > 
>>> >      >      > My theanoc file: 
>>> >      >      > 
>>> >      >      > |[global] floatX = float32 device = cuda [dnn] enabled = 
>>> > True 
>>> >      >      > include_path=C:/CUDA/v7.5/include 
>>> >     library_path=C:/CUDA/v7.5/lib/x64 
>>> >      >      > [blas] ldflags = C:/Program 
>>> >     Files/Anaconda3/envs/t/Library/bin 
>>> >      >     mkl_rt | 
>>> >      >      > 
>>> >      >      > Can somebody help please? 
>>> >      >      > 
>>> >      >      > 
>>> >      >      > Thanks! 
>>> >      >      > 
>>> >      >      > -- 
>>> >      >      > 
>>> >      >      > --- 
>>> >      >      > You received this message because you are subscribed to 
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>>> >      >      > Groups "theano-users" group. 
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>>> >     from it, 
>>> >      >     send 
>>> >      >      > an email to theano-users...@googlegroups.com <> 
>>> > <javascript:> 
>>> >      >      > <mailto:theano-users+unsubscr...@googlegroups.com <> 
>>> >     <javascript:> <javascript:>>. 
>>> >      >      > For more options, visit https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout> 
>>> >     <https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout>> 
>>> >      >     <https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout> 
>>> >     <https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout>>>. 
>>> >      > 
>>> >      >     -- 
>>> >      >     Pascal Lamblin 
>>> >      > 
>>> >      > -- 
>>> >      > 
>>> >      > --- 
>>> >      > You received this message because you are subscribed to the Google 
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>>> >      > To unsubscribe from this group and stop receiving emails from it, 
>>> >     send 
>>> >      > an email to theano-users...@googlegroups.com <> <javascript:> 
>>> >      > <mailto:theano-users+unsubscr...@googlegroups.com <> 
>>> > <javascript:>>. 
>>> >      > For more options, visit https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout> 
>>> >     <https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout>>. 
>>> > 
>>> >     -- 
>>> >     Pascal Lamblin 
>>> > 
>>> > -- 
>>> > 
>>> > --- 
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>>> > For more options, visit https://groups.google.com/d/optout 
>>> > <https://groups.google.com/d/optout>. 
>>> 
>>> -- 
>>> Pascal Lamblin 
>>> 
>>> -- 
>>> 
>>> --- 
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>> 
>> 
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