Question

我正在尝试使用MinGW-w64（x86_64）编译libpng。我使用MinGW Makefiles生成器使用CMake设置了libpng。运行make时，我得到以下输出：

Scanning dependencies of target png16
[  2%] Building C object CMakeFiles/png16.dir/png.obj
In file included from C:/PROGRA~2/MICROS~3.0/VC/include/vcruntime.h:46:0,
                 from C:/PROGRA~2/MICROS~3.0/VC/include/crtdefs.h:9,
                 from C:/PROGRA~1/MINGW-~1/X86_64~1.2-P/mingw64/x86_64-w64-mingw32/include/stdlib.h:9,
                 from C:\CPP\deps\lpng1617\pngpriv.h:42,
                 from C:\CPP\deps\lpng1617\png.c:14:
C:/PROGRA~2/MICROS~3.0/VC/include/vadefs.h:28:35: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'uintptr_t'
         typedef unsigned __int64  uintptr_t;
                                   ^
In file included from C:/PROGRA~2/MICROS~3.0/VC/include/crtdefs.h:9:0,
                 from C:/PROGRA~1/MINGW-~1/X86_64~1.2-P/mingw64/x86_64-w64-mingw32/include/stdlib.h:9,
                 from C:\CPP\deps\lpng1617\pngpriv.h:42,
                 from C:\CPP\deps\lpng1617\png.c:14:
C:/PROGRA~2/MICROS~3.0/VC/include/vcruntime.h:81:1: error: unknown type name 'pack'
 _CRT_BEGIN_C_HEADER
 ^
... and more ...

为什么MinGW尝试从Visual Studio中包含头文件？第9行的stdlib.h包括crtdefs.h，它包含在Visual Studio中，而不是MinGW目录中。为什么呢？

crtdefs.h确实存在于MinGW目录中（stdlib.h旁边）

我的%PATH%变量不包含任何Visual Studio（也不是Windows SDK）文件夹。

经过更多调查后，我发现build\CMakeFiles\png16_static.dir\includes_C.rsp包含-IC:/PROGRA~2/MICROS~3.0/VC/include

Answer 1

在几次系统重启后，重新安装MinGW和CMake，并将环境变量设置为默认值，它现在似乎正在运行。不确定到底出了什么问题。

MinGW使用Visual Studio标头而不是自己的标头

1 个答案: