libffi-3.3 x86_64-pc-linux-gnu build error with Clang + LTO

[telans]

System Details

Gentoo x86_64-pc-linux-gnu

clang version 12.0.0
Target: x86_64-pc-linux-gnu
Thread model: posix
InstalledDir: /usr/lib/llvm/12/bin
Selected GCC installation: /usr/lib/gcc/x86_64-pc-linux-gnu/10.2.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Selected multilib: .;@m64

CFLAGS='-march=znver2 -O3 -flto=thin -pipe'
CXXFLAGS='-march=znver2 -O3 -flto=thin -pipe'

Problems Description

Build failure when compiling:
error: changed section flags for .eh_frame, expected: 0x2

There are no issues when comping with Clang & no LTO, nor when compiling with GCC + LTO

libtool: compile:  clang -m32 -DHAVE_CONFIG_H -I. -I/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3 -I. -I/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/include -Iinclude -I/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/src -I. -I/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/include -Iinclude -I/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/src -march=znver2 -O3 -flto -pipe -c /var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/src/x86/sysv.S  -fPIC -DPIC -o src/x86/.libs/sysv.o
/var/tmp/portage/dev-libs/libffi-3.3-r2/work/libffi-3.3/src/x86/sysv.S:832:1: error: changed section flags for .eh_frame, expected: 0x2
.section .eh_frame,"aw",@progbits
^
make[2]: *** [Makefile:1254: src/x86/sysv.lo] Error 1

[TheK0tYaRa]

The issue persists with -O2 and on package version 3.3-r2

[mhsmith]

This looks like a duplicate of #638, which has now been fixed.

[TheK0tYaRa]

I don't think that's how time works, but alright.