When compiling in thumb mode for arm with -Os gcc gives up since it can not find registers
to spill. So we use -O2 option for compiling fork.c It may be addressable in gcc.

Signed-off-by: Khem Raj <raj.khem@gmail.com>

Upstream-Status: Pending

diff --git a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/Makefile.arch b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/Makefile.arch
index 329d8a9..41e3646 100644
--- a/libpthread/nptl/sysdeps/unix/sysv/linux/arm/Makefile.arch
+++ b/libpthread/nptl/sysdeps/unix/sysv/linux/arm/Makefile.arch
@@ -30,3 +30,9 @@ CFLAGS-OMIT-libc-lowlevellock.c = -DNOT_IN_libc -DIS_IN_libpthread
 # This macro should be alternatively implemented in THUMB
 # assembly.
 ASFLAGS-vfork.S = -marm
+
+# For arm fork.c does not compile with -Os when in compiling
+# in thumb1 mode
+ifeq ($(COMPILE_IN_THUMB_MODE),y)
+CFLAGS-fork.c = -O2
+endif