toolchain: introduce HOSTCC_VERSION and fix gcc-4.3.x build with old host CCs

gcc < 4.2.0 doesn't support -Wno-overlength-stings, but gcc-4.3.x configure
fails to detect that, breaking the build.

Work around it by detecting the host gcc version (and store in HOSTCC_VERSION)
and set the proper configure variables for gcc < 4.2.0.

diff --git a/package/Makefile.in b/package/Makefile.in
index c430f8bf3cdaa8b933ca495f5f32f71b2cd2cd0b..e9cf014f020a86ba1245b20334b7a4fa9efa6223 100644 (file)
--- a/package/Makefile.in
+++ b/package/Makefile.in
@@ -185,6 +185,10 @@ INSTALL=/usr/bin/install
 FLEX:=$(shell which flex || type -p flex)
 BISON:=$(shell which bison || type -p bison)
 
+# hostcc version as an integer - E.G. 4.3.2 => 432
+HOSTCC_VERSION:=$(shell $(HOSTCC) --version | \
+       sed -n 's/^.* \([0-9]*\)\.\([0-9]*\)\.\([0-9]*\)[ ]*.*$$/\1\2\3/p')
+
 HOST_ARCH:=$(shell $(HOSTCC) -dumpmachine | sed -e s'/-.*//' \
        -e 's/sparc.*/sparc/' \
        -e 's/arm.*/arm/g' \

diff --git a/toolchain/gcc/gcc-uclibc-4.x.mk b/toolchain/gcc/gcc-uclibc-4.x.mk
index 2bc25583fe5eaaefe0992c944b41065a32b32c24..fdc2fa4a3ee8fd7db990b8af0d3caa1df8f5af3f 100644 (file)
--- a/toolchain/gcc/gcc-uclibc-4.x.mk
+++ b/toolchain/gcc/gcc-uclibc-4.x.mk
@@ -145,6 +145,13 @@ ifeq ($(BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE),y)
 GCC_DECIMAL_FLOAT:=--disable-decimal-float
 endif
 
+# gcc version < 4.2.0 don't have -Wno-overlength-strings and the configure
+# script has problems detecting it, so help it
+ifeq ($(shell test $(HOSTCC_VERSION) -lt 420 && echo OLD),OLD)
+GCC_CONF_ENV:=acx_cv_prog_cc_pedantic__Wno_long_long__Wno_variadic_macros_____________Wno_overlength_strings=no \
+       acx_cv_prog_cc_warning__Wno_overlength_strings=no
+endif
+
 HOST_SOURCE+=gcc-source
 
 $(DL_DIR)/$(GCC_SOURCE):
@@ -227,7 +234,7 @@ $(GCC_BUILD_DIR1)/.configured: $(GCC_DIR)/.patched
 $(GCC_BUILD_DIR1)/.compiled: $(GCC_BUILD_DIR1)/.configured
        # gcc >= 4.3.0 have to also build all-target-libgcc
 ifeq ($(BR2_GCC_SUPPORTS_FINEGRAINEDMTUNE),y)
-       $(MAKE) -C $(GCC_BUILD_DIR1) all-gcc all-target-libgcc
+       $(GCC_CONF_ENV) $(MAKE) -C $(GCC_BUILD_DIR1) all-gcc all-target-libgcc
 else
        $(MAKE) -C $(GCC_BUILD_DIR1) all-gcc
 endif
@@ -301,7 +308,7 @@ $(GCC_BUILD_DIR2)/.configured: $(GCC_SRC_DIR)/.patched $(GCC_STAGING_PREREQ)
        touch $@
 
 $(GCC_BUILD_DIR2)/.compiled: $(GCC_BUILD_DIR2)/.configured
-       $(MAKE) -C $(GCC_BUILD_DIR2) all
+       $(GCC_CONF_ENV) $(MAKE) -C $(GCC_BUILD_DIR2) all
        touch $@
 
 $(GCC_BUILD_DIR2)/.installed: $(GCC_BUILD_DIR2)/.compiled