我制作了一个可与 GCC(4.7.3 及更高版本)编译并在 Linux 上运行的 OpenGL 项目。当尝试在 Windows 下使用安装了 GCC 4.9.2 的 MSYS2 编译相同的代码时,我收到大量错误报告:
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 from /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/stringfwd.h:40:0,
from /usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/string:39,
from include/windows.h:1,
from /usr/include/w32api/GL/gl.h:13,
from /mingw64/include/GL/freeglut_std.h:143,
from /mingw64/include/GL/freeglut.h:17,
from src/controls.cpp:1:
/usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:63:3: error: template with C linkage
template<typename>
^
/usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:66:3: error: template specialization with C linkage
template<>
^
/usr/lib/gcc/x86_64-pc-msys/4.9.2/include/c++/bits/memoryfwd.h:70:3: error: template with C linkage
template<typename, typename>
^
...
In file included from /mingw64/include/GL/freeglut_std.h:143:0,
from /mingw64/include/GL/freeglut.h:17,
from src/controls.cpp:1:
/usr/include/w32api/GL/gl.h:684:1: error: ‘WINGDIAPI’ does not name a 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 from /mingw64/include/GL/freeglut_std.h:144:0,
from /mingw64/include/GL/freeglut.h:17,
from 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);
^
...
这仅取自包含 4500 行错误的部分日志。这些是重复多次的最常见的。
我以前认为问题出在旧的 MSYS/MinGW(不是 MSYS2 端口)上,我首先尝试了相同的结果。然而,MSYS2 并没有解决让我完全不知所措的问题,因为我的代码是用 C++ 编写的,它只需要标准的 C 和 C++ 头文件以及一些 GL 头文件。我不使用任何外部“C”修饰。