https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92374
Bug ID: 92374
Summary: Unable to link relocatable object when GCC is
configured with "--disable-comdat"
Product: gcc
Version: 7.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: g.hoogewerf at gmail dot com
Target Milestone: ---
Recent versions of GCC exhibit problems building relocatable objects when GCC
is configured with "--disable-comdat". The easiest way to reproduce the
problem is to link libstdc++.a into a relocatable object:
> ./test/arm-none-eabi/bin/arm-none-eabi-ld -r --whole-archive
> ./test/arm-none-eabi/arm-none-eabi/lib/libstdc++.a -o test.o
The following error occurs in that case:
> `.LC2' referenced in section
> `.gnu.linkonce.t._ZNSt7__cxx1117moneypunct_bynameIwLb0EEC2EPKcj' of ./test
> /arm-none-eabi/arm-none-eabi/lib/libstdc++.a(cxx11-wlocale-inst.o): defined
> in discarded section
> `.gnu.linkonce.r._ZSt16__convert_from_vRKPiPciPKcz.str1.4' of
> ./test/arm-none-eabi/arm-none-eabi/lib/libstdc++.a(cxx11-wlocale-inst.o)
> [more errors to follow]
GCC configuration info:
> ./test/arm-none-eabi/bin/arm-none-eabi-gcc -v
> Using built-in specs.
> COLLECT_GCC=./test/arm-none-eabi/bin/arm-none-eabi-gcc
> COLLECT_LTO_WRAPPER=/scratch/arm-none-eabi-newlib/test/arm-none-eabi\
> /libexec/gcc/arm-none-eabi/7.4.1/lto-wrapper
> Target: arm-none-eabi
> Configured with: /src/gcc/configure --prefix=/scratch/arm-none-eabi-newlib\
> /test/arm-none-eabi --build=i686-pc-linux-gnu --host=i686-pc-linux-gnu \
> --target=arm-none-eabi --enable-languages=c,c++ --disable-libssp \
> --disable-multilib --disable-comdat --disable-nls --disable-fixed-point \
> --disable-decimal-float --enable-__cxa_atexit --disable-lto \
> --with-newlib --with-sysroot=/scratch/arm-none-eabi-newlib/test\
> /arm-none-eabi/arm-none-eabi/libc
> Thread model: single
> gcc version 7.4.1 20191105 (GCC)
This issue is reproducible on gcc-7-branch and gcc-8-branch. Trunk and the
gcc-9-branch seem to be unaffected.
