ostree: Use libgcc for compiler runtime when using glibc for system

glibc static library expects builtins from libgcc which may not exist
in compiler-rt, therefore use libgcc explicitly.

Now that static is enabled by default in packageconfig

Fix is taken from [1]

[1] foundriesio/meta-lmp@0abb08c

Signed-off-by: Khem Raj <[email protected]>

conf/nonclangable.conf

@@ -370,7 +370,6 @@ COMPILER_RT:remove:pn-webkitgtk:powerpc = "-rtlib=compiler-rt"
 COMPILER_RT:remove:pn-m4:armeb = "-rtlib=compiler-rt"
 COMPILER_RT:remove:pn-ruby:armeb = "-rtlib=compiler-rt"
 COMPILER_RT:remove:pn-webkitgtk:armeb = "-rtlib=compiler-rt"
-
 # build/lib/libQt5Widgets.so: undefined reference to `__lshrti3'
 # __lshrti3 is missing in libgcc
 COMPILER_RT:pn-qtbase:toolchain-clang:riscv32 = "-rtlib=compiler-rt ${UNWINDLIB}"
@@ -398,6 +397,17 @@ COMPILER_RT:pn-mpich:toolchain-clang:x86-64 = "-rtlib=libgcc --unwindlib=libgcc"
 COMPILER_RT:pn-aufs-util:libc-glibc:toolchain-clang:x86-64 = "-rtlib=libgcc --unwindlib=libgcc"
 COMPILER_RT:pn-libhugetlbfs:libc-glibc:toolchain-clang:x86-64 = "-rtlib=libgcc --unwindlib=libgcc"
 COMPILER_RT:pn-tsocks:libc-glibc:toolchain-clang:x86-64 = "-rtlib=libgcc --unwindlib=libgcc"
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot//usr/lib/libc.a(printf_fp.o): in function `__printf_fp_l':
+# | /usr/src/debug/glibc/2.35-r0/git/stdio-common/printf_fp.c:388: undefined reference to `__unordtf2'
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: /usr/src/debug/glibc/2.35-r0/git/stdio-common/printf_fp.c:388: undefined reference to `__unordtf2'
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: /usr/src/debug/glibc/2.35-r0/git/stdio-common/printf_fp.c:388: undefined reference to `__letf2'
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot//usr/lib/libc.a(printf_fphex.o): in function `__printf_fphex':
+# | /usr/src/debug/glibc/2.35-r0/git/stdio-common/../stdio-common/printf_fphex.c:206: undefined reference to `__unordtf2'
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: /usr/src/debug/glibc/2.35-r0/git/stdio-common/../stdio-common/printf_fphex.c:206: undefined reference to `__unordtf2'
+# | tmp-lmp/work/corei7-64-lmp-linux/ostree/2021.6-r0/recipe-sysroot-native/usr/bin/x86_64-lmp-linux/x86_64-lmp-linux-ld: /usr/src/debug/glibc/2.35-r0/git/stdio-common/../stdio-common/printf_fphex.c:206: undefined reference to `__letf2'
+# | x86_64-lmp-linux-clang -target x86_64-lmp-linux  -m64 -march=nehalem -mtune=generic -mfpmath=sse -msse4.2 -mlittle-endian --dyld-prefix=/usr -Qunused-arguments -fstack-protector-strong  -O2 -D_F
+COMPILER_RT:pn-ostree:libc-glibc:toolchain-clang:x86 = "-rtlib=libgcc --unwindlib=libgcc"
+COMPILER_RT:pn-ostree:libc-glibc:toolchain-clang:x86-64 = "-rtlib=libgcc --unwindlib=libgcc"
 
 #(unwind.o): in function `__pthread_unwind':
 #/usr/src/debug/glibc/2.29-r0/git/nptl/unwind.c:121: undefined reference to `_Unwind_ForcedUnwind'