mingw August 2020

mingw@lists.fedoraproject.org

3 participants
2 discussions

How to override CMAKE_FIND_ROOT_PATH
by Richard Shaw 14 Aug '20

14 Aug '20

I have a CMake project where I'm building wxWidgets on the fly. The libraries are in a subdirectory of the build directory. Unfortunately the CMAKE_FIND_ROOT_PATH gets prepended to the library name even though it's being provided as an absolute directory rather than a relative one. From running cmake --debug-find: find_library considered the following locations: /usr/x86_64-w64-mingw32/sys-root/mingw/home/build/build/freedv/external/dist/lib/(lib|)wxregexu-3.1-x86_64-w64-mingw32(\.dll|\.dll\.a|\.a|\.lib) Obviously this is wrong. It should be using the path, /home/build/build/freedv/external/dist/lib, directly without prepending anything. Help! Thanks, Richard

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Re: mingw GCC help needed: -fstack-protector and -lssp, undefined reference to `__strcpy_chk'
by Yaakov Selkowitz 04 Aug '20

04 Aug '20

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 -- Yaakov Selkowitz Senior Software Engineer - Platform Enablement Red Hat, Inc.

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mingw August 2020