https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95413
Bug ID: 95413
Summary: [11 regression] i686-linux --enable-targets=all cannot
configure m64 libgomp
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: bootstrap
Assignee: unassigned at gcc dot gnu.org
Reporter: ro at gcc dot gnu.org
CC: hjl at gcc dot gnu.org
Target Milestone: ---
Target: i686-pc-linux-gnu
Between 20200515 and 20200522, Linux/i686 bootstrap with --enable-targets=all
broke: after configuring with
$ .../configure CC='gcc -m32' CXX='g++ -m32' --enable-targets=all
--enable-languages=c --build=i686-pc-linux-gnu --disable-lto-plugin
configuring the stage1 64-bit libgomp fails:
checking whether the C compiler works... no
configure: error: in
`/var/gcc/gcc-11.0.0-20200529/4.20.4-gcc-32/i686-pc-linux-gnu/64/libgomp':
configure: error: C compiler cannot create executables
See `config.log' for more details
make[2]: *** [Makefile:20360: configure-stage1-target-libgomp] Error 1
config.log has
configure:3935:
/var/gcc/regression/master/4.20.4-gcc-gas-gld-32/build/./gcc/xgcc
-B/var/gcc/regression/master/4.20.4-gcc-gas-gld-32/build/./gcc/
-B/vol/gcc/i686-pc-linux-gnu/bin/ -B/vol/gcc/i686-pc-linux-gnu/lib/ -isystem
/vol/gcc/i686-pc-linux-gnu/include -isystem
/vol/gcc/i686-pc-linux-gnu/sys-include -fno-checking -m64 -g -O2 -pthread
-Wall -Werror -ftls-model=initial-exec -DUSING_INITIAL_EXEC_TLS -march=i486
-mtune=i686 conftest.c >&5
cc1: error: CPU you selected does not support x86-64 instruction set
whereas before this was
configure:3913: checking whether the C compiler works
configure:3935:
/var/gcc/regression/master/4.20.4-gcc-gas-gld-32/build/./gcc/xgcc
-B/var/gcc/regression/master/4.20.4-gcc-gas-gld-32/build/./gcc/
-B/vol/gcc/i686-pc-linux-gnu/bin/ -B/vol/gcc/i686-pc-linux-gnu/lib/ -isystem
/vol/gcc/i686-pc-linux-gnu/include -isystem
/vol/gcc/i686-pc-linux-gnu/sys-include -fno-checking -m64 -g -O2 -pthread
conftest.c >&5
I strongly suspect the CET patches, but haven't yet figured out what's going
wrong.
