2015-10-14 23:33:33 -0500 asked a question I'm getting a segmentation fault when building my library in Cygwin Hi all, I am using Cygwin in Windows 7 and am having some trouble with building my OpenCV library. Here are my steps so far: I downloaded the most recent stable version of the source (3.00) Navigated to my empty desired build directory and called cmake Called make from within the build directory This returns an error around 30% that 'close() is not declared in the scope of some function' in system.cpp, so I updated system.cpp to #include . This fixed that initial error, however a new error is causing issues now that I cannot seem to resolve. I wonder if my fix to the first issue is causing this seg fault, but I am not sure why it would. Here is the error message I am receiving: [ 30%] Linking CXX shared library ../../bin/cygopencv_core-3.0.dll collect2: fatal error: ld terminated with signal 11 [Segmentation fault], core dumped compilation terminated. /usr/lib/gcc/x86_64-pc-cygwin/5.2.0/../../../../x86_64-pc-cygwin/bin/ld: BFD (GNU Binutils) 2.25 assertion fail /cygdrive/i/szsz/tmpp/cygwin64/binutils/binutils-2.25-1.x86_64/src/binutils-gdb/bfd/cofflink.c:264 modules/core/CMakeFiles/opencv_core.dir/build.make:1242: recipe for target 'bin/cygopencv_core-3.0.dll' failed make[2]: *** [bin/cygopencv_core-3.0.dll] Error 1 make[2]: *** Deleting file 'bin/cygopencv_core-3.0.dll' CMakeFiles/Makefile2:1269: recipe for target 'modules/core/CMakeFiles/opencv_core.dir/all' failed make[1]: *** [modules/core/CMakeFiles/opencv_core.dir/all] Error 2 Makefile:149: recipe for target 'all' failed make: *** [all] Error 2  Here is my configuration for my build, if that is helpful: -- General configuration for OpenCV 3.0.0 ===================================== -- Version control: unknown -- -- Platform: -- Host: CYGWIN 2.2.1(0.289/5/3) x86_64 -- CMake: 3.3.1 -- CMake generator: Unix Makefiles -- CMake build tool: /usr/bin/make.exe -- Configuration: Release -- -- C/C++: -- Built as dynamic libs?: YES -- C++ Compiler: /usr/bin/c++.exe (ver 5.2.0)  Thanks in advance! I would really appreciate any help I can get