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Subject:	Re: Cmake on cygwin64 fails with error "C compiler "/usr/bin/cc" is not able to compile a simple test program"
To:	cygwin AT cygwin DOT com
References:	<ee151bc17b85475c885fb8dd1bfef9da AT sraex01sc DOT sisa DOT samsung DOT com>
From:	Marco Atzeri <marco DOT atzeri AT gmail DOT com>
Message-ID:	<086e947b-3b66-c73d-0ab9-630c1e34fa8e@gmail.com>
Date:	Tue, 21 Jun 2016 15:56:58 +0200
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In-Reply-To:	<ee151bc17b85475c885fb8dd1bfef9da@sraex01sc.sisa.samsung.com>
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On 21/06/2016 03:43, Frank Brill wrote:
> I am having trouble building an open source project using cmake under Cygwin64 with the latest tools (setup-x86_64.exe version 2.874).
>
> I was able to successfully build the project with 32-bit Cygwin with the latest tools:  gcc 5.4.0, gnu make 4.2.1, and cmake 3.3.2.
>
> I was also able to successfully build the project under Cygwin64 using older tools: gcc 4.9.3, gnu make 4.1, and cmake 3.3.2.
>
> But when I updated my Cygwin64 installation to the latest tools (gcc 5.4.0, gnu make 4.2.1, cmake 3.3.2) the build failed with the error message below.  I tried wiping my Cygwin64 installation and reinstalling from scratch but got the same result.  I thought it might be a PATH problem so I set my path the "/usr/bin" and still got the same result.  The CMakeFiles/CMakeTmp directory mentioned in the error message below was created, but there's nothing in it.
>
> Can someone provide some advice that can help me fix my Cygwin64 installation so that cmake works properly?
>
>        -- Frank
>
> $ cmake -DOPENVX_INCLUDES=$OPENVX_DIR/include -DOPENVX_LIBRARIES=$OPENVX_DIR/out/CYGWIN/x86_64/release/libopenvx.dll.a\;$OPENVX_DIR/out/CYGWIN/x86_64/release/libvxu.dll.a ../conformance_tests/
> -- The C compiler identification is GNU 5.4.0
> -- Check for working C compiler: /usr/bin/cc
> -- Check for working C compiler: /usr/bin/cc -- broken
> CMake Error at /usr/share/cmake-3.3.2/Modules/CMakeTestCCompiler.cmake:61 (message):
>   The C compiler "/usr/bin/cc" is not able to compile a simple test program.
>
>   It fails with the following output:
>
>    Change Dir: /cygdrive/c/Users/f.brill/Documents/OpenVX/trunk/packages/v_1_1/build64/CMakeFiles/CMakeTmp
>
>
>
>   Run Build Command:"/usr/bin/make.exe" "cmTC_5d15a/fast"
>
>   /usr/bin/make -f CMakeFiles/cmTC_5d15a.dir/build.make
>   CMakeFiles/cmTC_5d15a.dir/build
>
>   make[1]: Entering directory
>   '/cygdrive/c/Users/f.brill/Documents/OpenVX/trunk/packages/v_1_1/build64/CMakeFiles/CMakeTmp'
>
>
>   Building C object CMakeFiles/cmTC_5d15a.dir/testCCompiler.c.o
>
>   /usr/bin/cc -o CMakeFiles/cmTC_5d15a.dir/testCCompiler.c.o -c
>   /cygdrive/c/Users/f.brill/Documents/OpenVX/trunk/packages/v_1_1/build64/CMakeFiles/CMakeTmp/testCCompiler.c
>
>
>   Linking C executable cmTC_5d15a.exe
>
>   /usr/bin/cmake.exe -E cmake_link_script CMakeFiles/cmTC_5d15a.dir/link.txt
>   --verbose=1

what is the content of
   cmake_link_script
   CMakeFiles/cmTC_5d15a.dir/link.txt


>   /usr/bin/cc -Wl,--enable-auto-import
>   CMakeFiles/cmTC_5d15a.dir/testCCompiler.c.o -o cmTC_5d15a.exe
>   -Wl,--out-implib,libcmTC_5d15a.dll.a
>   -Wl,--major-image-version,0,--minor-image-version,0
>
>   make[1]: Leaving directory
>   '/cygdrive/c/Users/f.brill/Documents/OpenVX/trunk/packages/v_1_1/build64/CMakeFiles/CMakeTmp'
>
>
>   Error running link command: No such file or directory

that is very curious


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