uclibc_git.bb: Fix compilation on arm when using thumb instruction set

(From OE-Core rev: 7011d80c6cabc304e06237d167143d577fdd2570)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-core/uclibc/uclibc-git/append_UCLIBC_EXTRA_CFLAGS.patch

@@ -0,0 +1,33 @@
+UCLIBC_EXTRA_CFLAGS is currently added before the OPTIMIZATION flags
+and OPTIMIZATION is chosen to be Os by default. But in OE we pass the optimisation
+flags through UCLIBC_EXTRA_CFLAGS but they are not effective since -Os is
+specified at last. So we need to change the order of these option flags
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+
+Upstream-Status: Pending
+
+diff --git a/Rules.mak b/Rules.mak
+index 65fe47c..eca7f40 100644
+--- a/Rules.mak
++++ b/Rules.mak
+@@ -585,9 +574,6 @@ CFLAGS := -include $(top_srcdir)include/libc-symbols.h \
+ 	-nostdinc -I$(top_builddir)include -I$(top_srcdir)include -I. \
+ 	-I$(top_srcdir)libc/sysdeps/linux \
+ 	-I$(top_srcdir)libc/sysdeps/linux/$(TARGET_ARCH)
+-ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
+-CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
+-endif
+ 
+ # We need this to be checked within libc-symbols.h
+ ifneq ($(HAVE_SHARED),y)
+@@ -633,6 +619,9 @@ LDFLAGS += -Wl,-s
+ else
+ STRIPTOOL := true -Stripping_disabled
+ endif
++ifneq ($(strip $(UCLIBC_EXTRA_CFLAGS)),"")
++CFLAGS += $(call qstrip,$(UCLIBC_EXTRA_CFLAGS))
++endif
+ 
+ ifeq ($(DOMULTI),y)
+ # we try to compile all sources at once into an object (IMA), but

meta/recipes-core/uclibc/uclibc-git/compile-arm-fork-with-O2.patch

@@ -0,0 +1,21 @@
+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 is 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

meta/recipes-core/uclibc/uclibc_git.bb

@@ -2,7 +2,7 @@ SRCREV="71d63ed75648da9b0b71afabb9c60aaad792c55c"
 
 require uclibc.inc
 PV = "0.9.31+0.9.32rc3"
-PR = "${INC_PR}.1"
+PR = "${INC_PR}.2"
 PROVIDES += "virtual/${TARGET_PREFIX}libc-for-gcc"
 
 #recent versions uclibc require real kernel headers
@@ -27,5 +27,7 @@ SRC_URI = "git://uclibc.org/uClibc.git;branch=master;protocol=git \
 	file://argp-support.patch \
 	file://argp-headers.patch \
 	file://remove_attribute_optimize_Os.patch \
+	file://uclibc-git/append_UCLIBC_EXTRA_CFLAGS.patch \
+	file://compile-arm-fork-with-O2.patch \
 	"
 S = "${WORKDIR}/git"