As GCC sets `-D_FORTIFY_SOURCE=2` (maybe it's MSYS2 or `makepkg` well I don't really care about which one it is), those `__*_chk()` functions are now required when building GCC and its libraries. Unfortunately, mingw-w64 does not provide these (it relies libssp to provide them), so the build now fails with undefined references. I tried adding `-fstack-protector` into `LDFLAGS` and adding `-lssp` into `LIBS` when configuring GCC, but neither worked for me. The build process errorred out when building either libiberty or libcpp. Tampering with GCC builtin specs may be a solution, but I am not sure whether libtool likes that. It ignores default libraries and always attempts to link against everything at its own disposal. I am not sure whether libssp is (rather, can be made) available when building libiberty. Or this _FORTIFY_SOURCE thing should be disabled when building GCC for mingw-w64. Any suggestions will be appreciated. Build logs: ``` libtool: link: /e/GitHub/MINGW-packages/mingw-w64-gcc-git/src/build-x86_64-w64-mingw32/./prev-gcc/xgcc -B/e/GitHub/MINGW-packages/mingw-w64-gcc-git/src/build-x86_64-w64-mingw32/./prev-gcc/ -B/mingw64/x86_64-w64-mingw32/bin/ -L/mingw64/x86_64-w64-mingw32/lib -L/mingw64/lib -isystem /mingw64/x86_64-w64-mingw32/include -isystem /mingw64/include -B/mingw64/x86_64-w64-mingw32/bin/ -B/mingw64/x86_64-w64-mingw32/lib/ -isystem /mingw64/x86_64-w64-mingw32/include -isystem /mingw64/x86_64-w64-mingw32/sys-include -fno-checking -shared .libs/lto-plugin.o -L/mingw64/x86_64-w64-mingw32/lib -L/mingw64/lib -static-libgcc ../libiberty/libiberty.a -static-libstdc++ -static-libgcc -Wl,--stack -Wl,12582912 -o .libs/liblto_plugin-0.dll -Wl,--enable-auto-image-base -Xlinker --out-implib -Xlinker .libs/liblto_plugin.dll.a C:\MinGW\MSYS2\mingw64\x86_64-w64-mingw32\bin\ld.exe: ../libiberty/libiberty.a(simple-object-coff.o):simple-object-coff.c:(.text+0xb3a): undefined reference to `__memcpy_chk' C:\MinGW\MSYS2\mingw64\x86_64-w64-mingw32\bin\ld.exe: ../libiberty/libiberty.a(simple-object-mach-o.o):simple-object-mach-o.c:(.text+0xc91): undefined reference to `__strncpy_chk' C:\MinGW\MSYS2\mingw64\x86_64-w64-mingw32\bin\ld.exe: ../libiberty/libiberty.a(simple-object-xcoff.o):simple-object-xcoff.c:(.text+0x7b5): undefined reference to `__memcpy_chk' C:\MinGW\MSYS2\mingw64\x86_64-w64-mingw32\bin\ld.exe: ../libiberty/libiberty.a(xstrerror.o):xstrerror.c:(.text+0x4a): undefined reference to `__chk_fail' ``` -- Best regards, LH_Mouse
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