https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97618
Bug ID: 97618
Summary: undefined reference to LC11 building for target
MinGW-w64 32-bit
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: brechtsanders at users dot sourceforge.net
Target Milestone: ---
When building GCC11 with MinGW-w64 32-bit it fails in the Fortran language with
undefined references to LC<number> symbols.
Continuing to build without Fortran works.
However when using the resulting compuler the same error reappears when
building other libraries like libffi and boost.
The output of boost is this:
gcc.link.dll.mingw
build_win\boost\bin.v2\libs\log\build\gcc-11.0.0\release\visibility-hidden\libboost_log-x32.dll.a
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x3b9):
undefined reference to `LC10'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x3c9):
undefined reference to `LC11'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0xce6):
undefined reference to `LC10'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0xcee):
undefined reference to `LC11'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x19c6):
undefined reference to `LC10'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x19ce):
undefined reference to `LC11'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x2740):
undefined reference to `LC10'
d:/prog/winlibs32_stage/mingw32/bin/../lib/gcc/i686-w64-mingw32/11.0.0/../../../../i686-w64-mingw32/bin/ld.exe:
build_win/boost/bin.v2/libs/log/build/gcc-11.0.0/release/visibility-hidden/dump_avx2.o:dump_avx2.cpp:(.text+0x2750):
undefined reference to `LC11'
collect2.exe: error: ld returned 1 exit status
With libffi I noticed that when I replace -O3 with -O2 in each Makefile it does
actually build.
So it appears the issue is triggered by -O3 optimizations for MinGW Windows
32-bit builds.
