使用 -m32 编译 C++ 时出现 Cygwin G++ Windows 64 位错误

Question

我正在尝试使用 cygwin g++ 使用 -m32 编译我的 c++ 程序，但是当我尝试这样做时出现错误。

根据我所读到的问题，我需要从 cygwin 包管理器下载一个包，该包将允许 -m32 工作，但我不确定它是哪个包。我读到的另一篇文章说我必须从包管理器安装gcc-multilib 和g++-multilib，但这些包不在可用包的选择范围内。

/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../libcygwin.a     when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../libcygwin.a     when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../libcygwin.a     when searching for -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lcygwin
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -ladvapi32
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lshell32
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -luser32
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lkernel32
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc_s.dll.a when     searching for -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lgcc_s
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0//libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     skipping incompatible /usr/lib/gcc/x86_64-pc-cygwin/6.4.0/libgcc.a when     searching for -lgcc
/usr/lib/gcc/x86_64-pc-cygwin/6.4.0/../../../../x86_64-pc-cygwin/bin/ld:     cannot find -lgcc
collect2: error: ld returned 1 exit status

谢谢。

Answer 1

正如你所说，{gcc|g++}-mulitlib 软件包不是由 cygwin 提供的 包管理器。

要构建 32 位 C++ 目标，请安装包 mingw64-i686-gcc-g++，它 是 32 位目标的 mingw64 交叉编译器。然后用 编译器/usr/bin/i686-w64-mingw32-g++。不需要-m32 选项。