toolchain: remove useless indirect variables

The BR2_CONFIGURE_DEVEL_SYSROOT, BR2_CONFIGURE_STAGING_SYSROOT and
BR2_CONFIGURE_BUILD_TOOLS were used only in a few places, and it is in
fact clearer to just use their value in the various places they are
used.

The ultimate goal is to get rid of the toolchain/Makefile.in file.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

package/binutils/binutils.mk

@@ -37,7 +37,7 @@ endif
 HOST_BINUTILS_CONF_OPT = --disable-multilib --disable-werror \
 			--target=$(REAL_GNU_TARGET_NAME) \
 			--disable-shared --enable-static \
-			$(BR2_CONFIGURE_STAGING_SYSROOT) \
+			--with-sysroot=$(STAGING_DIR) \
 			$(BINUTILS_EXTRA_CONFIG_OPTIONS)
 
 HOST_BINUTILS_DEPENDENCIES =

toolchain/Makefile.in

@@ -1,6 +1,2 @@
-BR2_CONFIGURE_DEVEL_SYSROOT=--with-sysroot=$(TOOLCHAIN_DIR)/uClibc_dev/
-BR2_CONFIGURE_STAGING_SYSROOT=--with-sysroot=$(STAGING_DIR)
-BR2_CONFIGURE_BUILD_TOOLS=--with-build-time-tools=$(HOST_DIR)/usr/$(REAL_GNU_TARGET_NAME)/bin
-
 # gcc has a bunch of needed stuff....
 include toolchain/gcc/Makefile.in

toolchain/gcc/gcc-uclibc-4.x.mk

@@ -223,7 +223,7 @@ $(GCC_BUILD_DIR1)/.configured: $(GCC_DIR)/.patched
 		--host=$(GNU_HOST_NAME) \
 		--target=$(REAL_GNU_TARGET_NAME) \
 		--enable-languages=c \
-		$(BR2_CONFIGURE_DEVEL_SYSROOT) \
+		--with-sysroot=$(TOOLCHAIN_DIR)/uClibc_dev/ \
 		--disable-__cxa_atexit \
 		$(GCC_OPTSPACE) \
 		$(GCC_QUADMATH) \
@@ -291,7 +291,7 @@ $(GCC_BUILD_DIR2)/.configured: $(GCC_DIR)/.patched
 		--host=$(GNU_HOST_NAME) \
 		--target=$(REAL_GNU_TARGET_NAME) \
 		--enable-languages=c \
-		$(BR2_CONFIGURE_DEVEL_SYSROOT) \
+		--with-sysroot=$(TOOLCHAIN_DIR)/uClibc_dev/ \
 		--disable-__cxa_atexit \
 		$(GCC_OPTSPACE) \
 		$(GCC_QUADMATH) \
@@ -369,8 +369,8 @@ $(GCC_BUILD_DIR3)/.configured: $(GCC_SRC_DIR)/.patched $(GCC_STAGING_PREREQ)
 		--host=$(GNU_HOST_NAME) \
 		--target=$(REAL_GNU_TARGET_NAME) \
 		--enable-languages=$(GCC_CROSS_LANGUAGES) \
-		$(BR2_CONFIGURE_STAGING_SYSROOT) \
-		$(BR2_CONFIGURE_BUILD_TOOLS) \
+		--with-sysroot=$(STAGING_DIR) \
+		--with-build-time-tools=$(HOST_DIR)/usr/$(REAL_GNU_TARGET_NAME)/bin \
 		--disable-__cxa_atexit \
 		$(GCC_OPTSPACE) \
 		$(GCC_QUADMATH) \