baresip: fix build failure on 32bit x86 targets

re and baresip builds for 32bit x86 targets are currently failing:

build-i386/sip/auth.o: In function `sip_auth_encode':
/build/lede-snapshots/i386_pentium/build/sdk/build_dir/target-i386_pentium_musl/re-0.5.6/src/sip/auth.c:279: undefined reference to `__stack_chk_fail_local'

The undefined references occur because there is no linking done to ssp.
Fix this by setting LD to TARGET_CC, so ld is not called directly. This
also means one patch is not needed anymore.

Do the same for rem and restund as they basically all share the same
build system.

Compile-tested for x86, x86_64 and mips.

Signed-off-by: Sebastian Kemper <sebastian_ml@gmx.net>

libs/re/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=re
 PKG_VERSION:=0.5.6
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.creytiv.com/pub
@@ -41,6 +41,9 @@ endef
 # CFLAGS are picked up from the environment, as well as CPPFLAGS (and LD etc.).
 # But LDFLAGS aren't picked up, so they need to be handed over via
 # EXTRA_LFLAGS.
+#
+# LD is changed to TARGET_CC to fix build failures on x86 32bit. Without this
+# there's no linking to ssp, which results in undefined references.
 
 ifneq ($(CONFIG_USE_GLIBC)$(CONFIG_USE_MUSL),)
 TARGET_CFLAGS+=-D_GNU_SOURCE
@@ -48,6 +51,7 @@ endif
 
 MAKE_FLAGS+= \
 	EXTRA_LFLAGS="$(TARGET_LDFLAGS)" \
+	LD="$(TARGET_CC)" \
 	SYSROOT="$(shell $(FIND) $(TOOLCHAIN_DIR) -path '*/include/pthread.h' | sed -ne '1s|/include/pthread.h||p')" \
 	SYSROOT_ALT="$(STAGING_DIR)/usr" \
 	RELEASE=1

libs/re/patches/003-fix-linker-call.patch

---- a/mk/re.mk
-+++ b/mk/re.mk
-@@ -235,7 +235,7 @@ ifeq ($(OS),linux)
- 	LFLAGS		+= -fPIC
- 	SH_LFLAGS	+= -shared
- 	MOD_LFLAGS	+=
--	APP_LFLAGS	+= -rdynamic
-+	APP_LFLAGS	+= --export-dynamic
- 	AR		:= ar
- 	AFLAGS		:= crD
- endif

libs/rem/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=rem
 PKG_VERSION:=0.5.2
-PKG_RELEASE:=2
+PKG_RELEASE:=3
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.creytiv.com/pub
@@ -35,6 +35,7 @@ endef
 
 MAKE_FLAGS+= \
 	EXTRA_LFLAGS="$(TARGET_LDFLAGS)" \
+	LD="$(TARGET_CC)" \
 	LIBRE_MK="$(STAGING_DIR)/usr/share/re/re.mk" \
 	LIBRE_INC="$(STAGING_DIR)/usr/include/re" \
 	LIBRE_SO="$(STAGING_DIR)/usr/lib" \

net/baresip/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=baresip
 PKG_VERSION:=0.5.6
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.creytiv.com/pub
@@ -93,6 +93,7 @@ BARESIP_MOD_OPTIONS:= \
 
 MAKE_FLAGS+= \
 	EXTRA_LFLAGS="$(TARGET_LDFLAGS)" \
+	LD="$(TARGET_CC)" \
 	LIBRE_MK="$(STAGING_DIR)/usr/share/re/re.mk" \
 	LIBRE_INC="$(STAGING_DIR)/usr/include/re" \
 	LIBRE_SO="$(STAGING_DIR)/usr/lib" \

net/restund/Makefile

@@ -10,7 +10,7 @@ include $(TOPDIR)/rules.mk
 
 PKG_NAME:=restund
 PKG_VERSION:=0.4.12
-PKG_RELEASE:=3
+PKG_RELEASE:=4
 
 PKG_SOURCE:=$(PKG_NAME)-$(PKG_VERSION).tar.gz
 PKG_SOURCE_URL:=http://www.creytiv.com/pub
@@ -48,6 +48,7 @@ RESTUND_MOD_OPTIONS:= \
 
 MAKE_FLAGS+= \
 	EXTRA_LFLAGS="$(TARGET_LDFLAGS)" \
+	LD="$(TARGET_CC)" \
 	LIBRE_MK="$(STAGING_DIR)/usr/share/re/re.mk" \
 	LIBRE_INC="$(STAGING_DIR)/usr/include/re" \
 	LIBRE_SO="$(STAGING_DIR)/usr/lib" \