I've worked around this for now by symlinking bin/libssp-0.dll over lib/libssp.dll.a, not having any other ideas. I've also added -fstack-protector to the mingwXX_ldflags, as the mingwXX_cflags contain -D_FORTIFY_SOURCES=2. So now the toolchain update is pushed, I'll keep an eye on failures during the upcoming mass rebuild. Sandro On 09.07.20 14:36, Yaakov Selkowitz wrote: > On Thu, 2020-07-09 at 00:07 +0200, Sandro Mani wrote: >> I'm working on updating the mingw toolchain [1], and am hitting the >> situation [2] where I build with -fstack-protector in the ldflags, can >> confirm that -lssp and -lssp_nonshared are automatically added to the >> ldflags (seen via gcc -v [3] and strace), but I still get i.e. with this >> minimal testcase: >> >> #include <dirent.h> >> int main () { >> return closedir (NULL); >> } >> >> $ i686-w64-mingw32-gcc -o test.exe test.c -fstack-protector >> /usr/lib/gcc/i686-w64-mingw32/10.1.1/../../../../i686-w64-mingw32/bin/ld: >> /usr/i686-w64-mingw32/sys-root/mingw/lib/../lib/libmingwex.a(lib32_libmingwex_a-dirent.o):(.text+0x22f): >> undefined reference to `__strcpy_chk' >> collect2: error: ld returned 1 exit status > Perhaps mingw-crt should be built with -fno-stack-protector? > >> OTOH, if I write >> >> $ i686-w64-mingw32-gcc -o test.exe test.c -fstack-protector >> /usr/i686-w64-mingw32/sys-root/mingw/bin/libssp-0.dll >> >> it links correctly. >> >> The only other thing which came to mind to verify is that the import >> library references the correct dll, and this appears to be the case: >> >> $ i686-w64-mingw32-dlltool -I >> /usr/i686-w64-mingw32/sys-root/mingw/lib/libssp.dll.a >> libssp-0.dll >> >> I'd appreciate any pointers as I'm pretty much in the dark here. >> >> [1]https://copr.fedorainfracloud.org/coprs/smani/mingw-7.0.0/builds/ >> >> [2] Specifically when building mingw-gdb, which adds >> -D_FORTIFY_SOURCES=2 internally, hence adding -fstack-protector to the >> ldflags >> >> [3] I.e. I gtt COLLECT_GCC_OPTIONS='-v' '-o' 'test.exe' >> '-fstack-protector' '-mtune=generic' '-march=pentiumpro' >> /usr/libexec/gcc/i686-w64-mingw32/10.1.1/collect2 -plugin >> /usr/libexec/gcc/i686-w64-mingw32/10.1.1/liblto_plugin.so >> -plugin-opt=/usr/libexec/gcc/i686-w64-mingw32/10.1.1/lto-wrapper >> -plugin-opt=-fresolution=/tmp/cckKHr8u.res >> -plugin-opt=-pass-through=-lmingw32 -plugin-opt=-pass-through=-lgcc >> -plugin-opt=-pass-through=-lgcc_eh -plugin-opt=-pass-through=-lmoldname >> -plugin-opt=-pass-through=-lmingwex -plugin-opt=-pass-through=-lmsvcrt >> -plugin-opt=-pass-through=-lpthread -plugin-opt=-pass-through=-ladvapi32 >> -plugin-opt=-pass-through=-lshell32 -plugin-opt=-pass-through=-luser32 >> -plugin-opt=-pass-through=-lkernel32 -plugin-opt=-pass-through=-lmingw32 >> -plugin-opt=-pass-through=-lgcc -plugin-opt=-pass-through=-lgcc_eh >> -plugin-opt=-pass-through=-lmoldname -plugin-opt=-pass-through=-lmingwex >> -plugin-opt=-pass-through=-lmsvcrt >> --sysroot=/usr/i686-w64-mingw32/sys-root -m i386pe -Bdynamic -o test.exe >> /usr/i686-w64-mingw32/sys-root/mingw/lib/../lib/crt2.o >> /usr/lib/gcc/i686-w64-mingw32/10.1.1/crtbegin.o >> -L/usr/lib/gcc/i686-w64-mingw32/10.1.1 >> -L/usr/lib/gcc/i686-w64-mingw32/10.1.1/../../../../i686-w64-mingw32/lib/../lib >> -L/usr/i686-w64-mingw32/sys-root/mingw/lib/../lib >> -L/usr/lib/gcc/i686-w64-mingw32/10.1.1/../../../../i686-w64-mingw32/lib >> -L/usr/i686-w64-mingw32/sys-root/mingw/lib /tmp/ccpeowDx.o >> /usr/i686-w64-mingw32/sys-root/mingw/bin/libssp-0.dll -lssp_nonshared >> -lssp -lmingw32 -lgcc -lgcc_eh -lmoldname -lmingwex -lmsvcrt -lpthread >> -ladvapi32 -lshell32 -luser32 -lkernel32 -lmingw32 -lgcc -lgcc_eh >> -lmoldname -lmingwex -lmsvcrt /usr/lib/gcc/i686-w64-mingw32/10.1.1/crtend.o

I see the following build failures: Related to -fstack-protector/-lssp: * mingw-openssl: undefined reference to ***_chk * mingw-boost: undefined reference to ***_chk * mingw-c-ares: configure: LDFLAGS error: LDFLAGS may only be used to specify linker flags, not libraries. Use LIBS for: -lssp => I'll look into those error: invalid use of '__builtin_va_arg_pack ()': * mingw-speex * mingw-celt051 => Needs investigation Invalid configuration `aarch64-redhat-linux-gnu': machine `aarch64-redhat' not recognized: * mingw-cppunit * mingw-liboil => Needs investigation multiple definition of `xxx': * mingw-gdbm * mingw-gtkglext => Most likely due to missing extern declarations Other: * mingw-gstreamer-plugins-base: error: 'GST_TUNER_CHANNEL_OUTPUT' undeclared => Suppose this will need to be retired anyway as the other gst-0.x packages have been retired * mingw-mediawriter: cannot find -llzma.dll.a => should be trivial, just a wrong import lib name being use * mingw-wine-gecko: internal compiler error: in linemap_compare_locations, at libcpp/line-map.c:1359 => needs an upstream bug report with preprocessed source