https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120653
--- Comment #5 from Sam James <sjames at gcc dot gnu.org> --- Created attachment 61636 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61636&action=edit rtld.i.xz Building elf/rtld.o with -fno-strict-aliasing breaks it. Attached rtld.i.xz. It's built with: ``` gcc rtld.c -c -std=gnu11 -fgnu89-inline -O2 -Wall -Wwrite-strings -Wundef -Wimplicit-fallthrough -fmerge-all-constants -frounding-math -fno-stack-protector -fno-common -U_FORTIFY_SOURCE -Wstrict-prototypes -Wold-style-definition -fmath-errno -fPIC -fno-stack-protector -DSTACK_PROTECTOR_LEVEL=0 -mno-mmx -fno-tree-loop-distribute-patterns '-DSYSCONFDIR="/etc"' -ftls-model=initial-exec -I../include -I/tmp/build-mangled/elf -I/tmp/build-mangled -I../sysdeps/unix/sysv/linux/x86_64/64 -I../sysdeps/unix/sysv/linux/x86_64/include -I../sysdeps/unix/sysv/linux/x86_64 -I../sysdeps/unix/sysv/linux/x86/include -I../sysdeps/unix/sysv/linux/x86 -I../sysdeps/x86/nptl -I../sysdeps/unix/sysv/linux/wordsize-64 -I../sysdeps/x86_64/nptl -I../sysdeps/unix/sysv/linux/include -I../sysdeps/unix/sysv/linux -I../sysdeps/nptl -I../sysdeps/pthread -I../sysdeps/gnu -I../sysdeps/unix/inet -I../sysdeps/unix/sysv -I../sysdeps/unix/x86_64 -I../sysdeps/unix -I../sysdeps/posix -I../sysdeps/x86_64/64 -I../sysdeps/x86_64/fpu/multiarch -I../sysdeps/x86_64/fpu -I../sysdeps/x86/fpu -I../sysdeps/x86_64/multiarch -I../sysdeps/x86_64 -I../sysdeps/x86/include -I../sysdeps/x86 -I../sysdeps/ieee754/float128 -I../sysdeps/ieee754/ldbl-96/include -I../sysdeps/ieee754/ldbl-96 -I../sysdeps/ieee754/dbl-64 -I../sysdeps/ieee754/flt-32 -I../sysdeps/wordsize-64 -I../sysdeps/ieee754 -I../sysdeps/generic -I.. -I../libio -I. -D_LIBC_REENTRANT -include /tmp/build-mangled/libc-modules.h -DMODULE_NAME=rtld -include ../include/libc-symbols.h -DPIC -DSHARED -DTOP_NAMESPACE=glibc -o /tmp/build-mangled/elf/rtld.os -MD -MP -MF /tmp/build-mangled/elf/rtld.os.dt -MT /tmp/build-mangled/elf/rtld.os -save-temps ``` Adding -fno-strict-aliasing in there and using a small script to relink and build the tests makes it fail.
