xfce xfconf fails to compile with lto here

[javashin]

https://gist.github.com/javashin/d585ffc91d6e2544f870a63b353b5dd3

but compiles fine with
xfce-base/xfconf-4.14.1::gentoo was built with the following:
USE="introspection perl vala -debug" ABI_X86="(64)"
CFLAGS="-march=native -mfpmath=both -funroll-loops -falign-functions=32 -fgraphite-identity -floop-nest-optimize -fno-semantic-interposition -fuse-ld=bfd -O3 -fipa-pta -fno-plt -fno-math-errno -fno-trapping-math -fdevirtualize-at-ltrans -fno-stack-protector -pipe -Wl,-O2 -Wl,--as-needed,-z,now -Wl,--hash-style=gnu"
CXXFLAGS="-march=native -mfpmath=both -funroll-loops -falign-functions=32 -fgraphite-identity -floop-nest-optimize -fno-semantic-interposition -fuse-ld=bfd -O3 -fipa-pta -fno-plt -fno-math-errno -fno-trapping-math -fdevirtualize-at-ltrans -fno-stack-protector -pipe -Wl,-O2 -Wl,--as-needed,-z,now -Wl,--hash-style=gnu"

[ElDavoo]

No idea
xfce-base/xfconf-4.14.1::gentoo was built with the following:
USE="-debug -introspection -perl -vala" ABI_X86="(64)"
CFLAGS="-O2 -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
CXXFLAGS="-O2 -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -O2 -march=native -falign-functions=32 -O3 -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=1 -fuse-linker-plugin"

[skinkie]

Still an issue with xfce-base/xfconf-4.14.3

[King-Mucus]

Edit: just like the others, I managed to compile it successfully after adding "xfce-base/xfconf *FLAGS-=-flto*" to ltoworkarounds.conf

I'm using the hardened profile here, so that might be contributing for some people to be unable to replicate this.

Failed to build xfce-base/xfconf-4.15.0 with GCC 10.2.0 and global ~amd64.

CFLAGS="-march=native -O3 ${SAFEST_FAST_MATH} ${GRAPHITE} ${DEVIRTLTO} ${IPAPTA} ${SEMINTERPOS} ${FLTO} -fuse-linker-plugin"

libtool: link: x86_64-pc-linux-gnu-gcc -o /var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf/tmp-introspectkvqyv1o3/.libs/Xfconf-0 -DNDEBUG -DHAVE_GNUC_VISIBILITY -march=native -O3 -fno-math-errno -fno-trapping-math -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=auto -fuse-linker-plugin -Wl,-O1 -Wl,--as-needed -fvisibility=hidden /var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf/tmp-introspectkvqyv1o3/Xfconf-0.o -Wl,--export-dynamic -pthread -Wl,-O1 -Wl,--as-needed -march=native -O3 -fno-math-errno -fno-trapping-math -fgraphite-identity -floop-nest-optimize -fdevirtualize-at-ltrans -fipa-pta -fno-semantic-interposition -flto=auto -fuse-linker-plugin -Wl,--as-needed -Wl,-O1 -Wl,--export-dynamic -L. ./.libs/libxfconf-0.so -lgthread-2.0 -lgio-2.0 -lgobject-2.0 -lgmodule-2.0 -lglib-2.0 -pthread
Invalid GType function: 'xfconf_channel_get_type'
Failed to find symbol 'xfconf_channel_get_type'
Command '['/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf/tmp-introspectkvqyv1o3/Xfconf-0', '--introspect-dump=/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf/tmp-introspectkvqyv1o3/functions.txt,/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf/tmp-introspectkvqyv1o3/dump.xml']' returned non-zero exit status 1.
make[2]: *** [/usr/share/gobject-introspection-1.0/Makefile.introspection:156: Xfconf-0.gir] Error 1
make[2]: Leaving directory '/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0/xfconf'
make[1]: *** [Makefile:496: all-recursive] Error 1
make[1]: Leaving directory '/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0'
make: *** [Makefile:428: all] Error 2

• ERROR: xfce-base/xfconf-4.15.0::gentoo failed (compile phase):
• emake failed
• If you need support, post the output of emerge --info '=xfce-base/xfconf-4.15.0::gentoo',
• the complete build log and the output of emerge -pqv '=xfce-base/xfconf-4.15.0::gentoo'.
• The complete build log is located at '/var/tmp/portage/xfce-base/xfconf-4.15.0/temp/build.log'.
• The ebuild environment file is located at '/var/tmp/portage/xfce-base/xfconf-4.15.0/temp/environment'.
• Working directory: '/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0'
• S: '/var/tmp/portage/xfce-base/xfconf-4.15.0/work/xfconf-4.15.0'