c++ - Compiling a program under Windows gives a bunch of "error: template with C linkage" reports -


i have made opengl project compilable gcc (version 4.7.3 , newer) , runable on linux. when trying compile same code under windows using msys2 gcc 4.9.2 installed, tons of error reports:

g++ -g --std=c++11 src/*.cpp -iinclude -isrc -lil -lilu -lilut -lgl -lglu -lglut -lm -dwin32 -i/mingw64/include windows/src/*.cpp -o "achtung, die kurve 3d!" in file included /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/stringfwd.h:40:0,                  /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/string:39,                  include/windows.h:1,                  /usr/include/w32api/gl/gl.h:13,                  /mingw64/include/gl/freeglut_std.h:143,                  /mingw64/include/gl/freeglut.h:17,                  src/controls.cpp:1: /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:63:3: error: template c linkage    template<typename>    ^ /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:66:3: error: template specialization c linkage    template<>    ^ /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:70:3: error: template c linkage    template<typename, typename>    ^  ...  in file included /mingw64/include/gl/freeglut_std.h:143:0,                  /mingw64/include/gl/freeglut.h:17,                  src/controls.cpp:1: /usr/include/w32api/gl/gl.h:684:1: error: ‘wingdiapi’ not name type  wingdiapi void apientry glaccum(glenum op,glfloat value);  ...  /usr/include/w32api/gl/gl.h:1037:24: error: expected ‘)’ before ‘*’ token  typedef void (apientry *pfnglgetcolortableparameterfvextproc)(glenum target,glenum pname,glfloat *params);                         ^ in file included /mingw64/include/gl/freeglut_std.h:144:0,                  /mingw64/include/gl/freeglut.h:17,                  src/controls.cpp:1: /usr/include/w32api/gl/glu.h:24:25: error: expected initializer before ‘gluerrorstring’  const glubyte *apientry gluerrorstring(glenum errcode);                          ^ /usr/include/w32api/gl/glu.h:25:25: error: expected initializer before ‘gluerrorunicodestringext’  const wchar_t *apientry gluerrorunicodestringext(glenum errcode);                          ^  ...

this taken partial log consisting of 4500 lines of errors. these frequent ones repeated many times.

i thought problem lied in old msys/mingw (not msys2 port) tried first same results. however, msys2 did not solve problems makes me clueless since code written in c++ , requires standard c , c++ header files along gl ones. not use extern "c" mangling.

you using msys2 gcc here, not mingw-w64 gcc.

please read msys2 wiki [1] of explained, briefly:

run mingw64_shell.bat, not msys2_shell.bat, install mingw-w64 gcc toolchain package(s). command installs both 32-bit , 64-bit ones using bash curly brace expansion feature:

pacman -s mingw-w64-{x86_64,i686}-toolchain

.. see gcc -dumpmachine reports x86_64-w64-mingw32 , not x86_64-pc-msys

[1] https://sourceforge.net/p/msys2/wiki/home/


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