I've been trying for almost a to build fltk on windows in so many different ways but I always end up with:

configure: error: C compiler cannot create executable (msys fltk/configure)

or

Check for working C compiler: C:/MinGW/bin/gcc.exe -- broken (CMake-gui)

I've tried it with fltk 1.3.0 and 1.3.3 and I've even used three different MinGW distros, GCC version: 5.1.0; 4.9.2 and 3.4.5. Yet it just won't compile. Here is some of the error log generated by the ./configure file:

$ ./configure --prefix=C:/libs/fltk-1.3.3

-----------

Core tests.

-----------

configure:1336: checking build system type configure:1354: result: i686-pc-mingw32 configure:1362: checking host system type configure:1376: result: i686-pc-mingw32 configure:1439: checking for gcc configure:1455: found /c/mingw32/bin/gcc configure:1465: result: gcc configure:1709: checking for C compiler version configure:1712: gcc --version &5 gcc.exe (i686-win32-dwarf-rev2, Built by MinGW-W64 project) 4.9.2 Copyright (C) 2014 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

configure:1715: $? = 0 configure:1717: gcc -v &5 Using built-in specs. COLLECT_GCC=c:\mingw32\bin\gcc.exe COLLECT_LTO_WRAPPER=c:/mingw32/bin/../libexec/gcc/i686-w64-mingw32/4.9.2/lto-wrapper.exe Target: i686-w64-mingw32 Configured with: ../../../src/gcc-4.9.2/configure --host=i686-w64-mingw32 --build=i686-w64-mingw32 --target=i686-w64-mingw32 --prefix=/mingw32 --with-sysroot=/c/mingw492/i686-492-win32-dwarf-rt_v4-rev2/mingw32 --with-gxx-include-dir=/mingw32/i686-w64-mingw32/include/c++ --enable-shared --enable-static --disable-multilib --enable-languages=ada,c,c++,fortran,objc,obj-c++,lto --enable-libstdcxx-time=yes --enable-threads=win32 --enable-libgomp --enable-libatomic --enable-lto --enable-graphite --enable-checking=release --enable-fully-dynamic-string --enable-version-specific-runtime-libs --disable-sjlj-exceptions --with-dwarf2 --disable-isl-version-check --disable-cloog-version-check --disable-libstdcxx-pch --disable-libstdcxx-debug --enable-bootstrap --disable-rpath --disable-win32-registry --disable-nls --disable-werror --disable-symvers --with-gnu-as --with-gnu-ld --with-arch=i686 --with-tune=generic --with-libiconv --with-system-zlib --with-gmp=/c/mingw492/prerequisites/i686-w64-mingw32-static --with-mpfr=/c/mingw492/prerequisites/i686-w64-mingw32-static --with-mpc=/c/mingw492/prerequisites/i686-w64-mingw32-static --with-isl=/c/mingw492/prerequisites/i686-w64-mingw32-static --with-cloog=/c/mingw492/prerequisites/i686-w64-mingw32-static --enable-cloog-backend=isl --with-pkgversion='i686-win32-dwarf-rev2, Built by MinGW-W64 project' --with-bugurl=http://sourceforge.net/projects/mingw-w64 CFLAGS='-O2 -pipe -I/c/mingw492/i686-492-win32-dwarf-rt_v4-rev2/mingw32/opt/include -I/c/mingw492/prerequisites/i686-zlib-static/include -I/c/mingw492/prerequisites/i686-w64-mingw32-static/include' CXXFLAGS='-O2 -pipe -I/c/mingw492/i686-492-win32-dwarf-rt_v4-rev2/mingw32/opt/include -I/c/mingw492/prerequisites/i686-zlib-static/include -I/c/mingw492/prerequisites/i686-w64-mingw32-static/include' CPPFLAGS= LDFLAGS='-pipe -L/c/mingw492/i686-492-win32-dwarf-rt_v4-rev2/mingw32/opt/lib -L/c/mingw492/prerequisites/i686-zlib-static/lib -L/c/mingw492/prerequisites/i686-w64-mingw32-static/lib -Wl,--large-address-aware' Thread model: win32 gcc version 4.9.2 (i686-win32-dwarf-rev2, Built by MinGW-W64 project) configure:1720: $? = 0 configure:1722: gcc -V &5 gcc.exe: error: unrecognized command line option '-V' gcc.exe: fatal error: no input files compilation terminated. configure:1725: $? = 1 configure:1748: checking for C compiler default output configure:1751: gcc
conftest.c >&5 c:/mingw32/bin/../lib/gcc/i686-w64-mingw32/4.9.2/../../../../i686-w64-mingw32/lib/../lib/libmingw32.a(lib32_libmingw32_a-crt0_c.o):crt0_c.c:(.text.startup+0x39): undefined reference to `WinMain@16' collect2.exe: error: ld returned 1 exit status configure:1754: $? = 1 configure: failed program was: |

line 1728 "configure" | /* confdefs.h. */ | | #define PACKAGE_NAME "" | #define PACKAGE_TARNAME "" | #define PACKAGE_VERSION "" | #define

PACKAGE_STRING "" | #define PACKAGE_BUGREPORT "" | /* end confdefs.h. */ | | int main () | { | | ; | return 0; | } configure:1793: error: C compiler cannot create executables See `config.log' for more details.

configure: exit 77

I previously compiled 2 other gui libraries with these same tools (nana and SFML), so there can't be anything wrong with the gcc compilers.

EDIT

Something (most probably cygwin) keeps breaking my mingw gcc program and every time its "broken" I get black vcc1.exe windows. Then I must replace the mingw folder to get it working again, this happens mostly when I open netbeans. I just don't know how to fix this, so I've just been avoiding cygwin and netbeans.