“双目标”MinGW-w64 不是真的双目标吗？

Question

当我尝试使用MinGW-builds 在 64 位主机上编译 32 位程序时：

T:\mingw64>.\bin\g++ -m32 Test.cpp

我明白了：

t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libstdc++.dll.a when searching for -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libstdc++.a when searching for -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0\libstdc++.a when searching for -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libstdc++.dll.a when searching for -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libstdc++.a when searching for -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lstdc++
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0\libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libadvapi32.a when searching for -ladvapi32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libadvapi32.a when searching for -ladvapi32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libadvapi32.a when searching for -ladvapi32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -ladvapi32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libshell32.a when searching for -lshell32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libshell32.a when searching for -lshell32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libshell32.a when searching for -lshell32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lshell32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libuser32.a when searching for -luser32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libuser32.a when searching for -luser32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libuser32.a when searching for -luser32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -luser32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libkernel32.a when searching for -lkernel32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libkernel32.a when searching for -lkernel32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libkernel32.a when searching for -lkernel32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lkernel32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libiconv.a when searching for -liconv
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libiconv.a when searching for -liconv
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libiconv.a when searching for -liconv
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -liconv
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingw32.a when searching for -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmingw32
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libgcc_s.a when searching for -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgcc_s
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0\libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/libgcc.a when searching for -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lgcc
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmoldname.a when searching for -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmoldname
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmingwex.a when searching for -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmingwex
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib\libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: skipping incompatible t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/lib/libmsvcrt.a when searching for -lmsvcrt
t:/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/4.8.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lmsvcrt
collect2.exe: error: ld returned 1 exit status

类似地，当我尝试使用 MinGW-builds 在 32 位主机上编译 64 位程序时：

T:\mingw32>.\bin\g++ -m64 Test.cpp

我明白了：

Test.cpp:1:0: sorry, unimplemented: 64-bit mode not compiled in
 #include <iostream>
 ^

不是MinGW-builds supposed to be dual-target吗？

我错过了什么？

Answer 1

对于那些使用 mingw 在 linux 上遇到此链接器错误的人，您可能正在尝试使用带有 -m32 标志或其他方式的 64 位编译器构建 32 位二进制文​​件。

要解决此问题，只需使用 i686-w64-mingw32 而不是 x86_64-w64-mingw32 进行编译。

Answer 2

虽然 MinGW-w64 Wiki 上的 General Usage Instructions 页面声称 MinGW-builds 项目提供了双目标编译器，但这不再完全正确。 SEH 变体（从 GCC 4.8.0 开始）只是单目标。您可以通过检查其发行版的目录结构来亲自查看，即它们仅包含具有 64 位或 32 位寻址的库，但不能同时包含两者。此外，最近它在 MinGW-builds 的邮件列表中得到了确认。

另一方面，普通的旧 SJLJ 发行版确实是双目标的。如果你得到：

应用程序无法正确启动 (0xc000007b)。 单击“确定”关闭应用程序。

在运行由这些发行版生成的 64 位应用程序时，您应该记得 0xC000007B 是 STATUS_INVALID_IMAGE_FORMAT 的代码，这很好地证明了 64 位应用程序正在尝试加载 32 位 DLL。可能，您已将 \bin 添加到 PATH，而应该添加 \i686-w64-mingw32\lib64 以使 64 位应用程序正常运行。