我目前正在嘗試將我的 C 源代碼交叉編譯成 PE32 可執行檔案，但效果并不理想。
我正在運行 macOS Ventura Beta 8 (macOS 13)，使用與 LLVM 捆綁在一起的 Clang（通過 Homebrew tap 安裝）。
下面是編譯源檔案的命令：
/usr/local/opt/llvm/bin/clang \
--target=x86_64-unknown-windows-gnu \
-Wl,-e,_KernMain \
-o kernel.o \
src/Kernel/Kernel.c \
src/Kernel/Memory/KernMem.c \
src/Kernel/Graphics/KernGraphics.c \
-I/Users/kernel/Documents/edk2-master/edk2/MdePkg/Include/ \
-I/Users/kernel/Documents/edk2-master/edk2/MdePkg/Include/X64 \
-I/Users/kernel/Documents/edk2-master/edk2/KernelOSPkg/src/Common \
-I/Users/kernel/Downloads/mingw64/x86_64-w64-mingw32/include \
-L/Users/kernel/Documents/edk2-master/edk2/MdePkg/Library/ \
-L/Users/kernel/Downloads/mingw64/x86_64-w64-mingw32/lib \
-L/Users/kernel/Downloads/mingw64/x86_64-w64-mingw32/lib/ldscripts \
-L/usr/local/lib \
-fuse-ld="/usr/local/opt/llvm/bin/ld.lld"
它拋出以下錯誤：
lld: error: unable to find library -lgcc
lld: error: unable to find library -lgcc_eh
lld: error: unable to find library -lgcc
lld: error: unable to find library -lgcc_eh
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
CLANG info:
/usr/local/opt/llvm/bin/clang --version
Homebrew clang version 15.0.2
Target: x86_64-apple-darwin22.1.0
Thread model: posix
InstalledDir: /usr/local/opt/llvm/bin
ld.lld info:
/usr/local/opt/llvm/bin/ld.lld --version
Homebrew LLD 15.0.2 (compatible with GNU linkers)
uj5u.com熱心網友回復：
問題是我沒有包含/path/to/mingw64/lib/gcc/x86_64-w64-mingw32/<version>包含libgcc.a和libgcc_eh.a檔案的目錄。
不過，我仍然不知道如何使用未定義的符號解決問題： WinMain。如果我找到解決方案，我會更新這個答案。
有問題的錯誤：
ld.lld: error: undefined symbol: WinMain
>>> referenced by libmingw32.a(lib64_libmingw32_a-crt0_c.o):(.text.startup)
clang-15: error: linker command failed with exit code 1 (use -v to see invocation)
編譯命令（未定義符號導致編譯不成功）：
/usr/local/opt/llvm/bin/clang \
-target x86_64-unknown-windows-gnu \
-Wl,-e,KernMain \
-fuse-ld=lld \
-ffreestanding \
-o kernel.o \
src/Kernel/Kernel.c \
src/Kernel/Memory/KernMem.c \
src/Kernel/Graphics/KernGraphics.c \
-I/Users/kernel/Documents/edk2-master/edk2/MdePkg/Include/ \
-I/Users/kernel/Documents/edk2-master/edk2/MdePkg/Include/X64 \
-I/Users/kernel/Documents/edk2-master/edk2/KernelOSPkg/src/Common \
-I/Users/kernel/Downloads/mingw64/x86_64-w64-mingw32/include \
-L/Users/kernel/Downloads/mingw64/lib/gcc/x86_64-w64-mingw32/12.2.0 \
-L/Users/kernel/Documents/edk2-master/edk2/MdePkg/Library/ \
-L/Users/kernel/Downloads/mingw64/x86_64-w64-mingw32/lib \
-fshort-wchar
編輯：要使用未定義的符號修復上述錯誤，只需提供-nostdlib給編譯器即可。
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標籤：C苹果系统铛交叉编译
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