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From: "brechtsanders at users dot sourceforge.net" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c/97618] undefined reference to LC11 building for target
 MinGW-w64 32-bit
Date: Wed, 28 Oct 2020 15:48:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97618

--- Comment #2 from Brecht Sanders <brechtsanders at users dot sourceforge.=
net> ---
To build mpfr wich fails with:
build_mingw\i686-w64-mingw32\libgcc/../../../libgcc/config/libbid/bid128_di=
v.c:1523:
undefined reference to `LC4'
I figured out that the symbol LC4 is defined in libgcc.a, so I was able to
build mpfr by running:
make LIBS=3D"-Wl,--as-needed -lgmp -lgcc"

It appears that in this case the GCC 11 linker doesn't automatically link w=
ith
libgcc.=