From b2e88073dbf05faa47475bf96d5ccf8a45906a3c Mon Sep 17 00:00:00 2001 From: Thomas Petazzoni Date: Wed, 17 Jul 2013 22:30:48 +0200 Subject: [PATCH] toolchain: check ARM EABI vs. EABIhf for external toolchains Following the introduction of the support of EABIhf as a second ARM ABI, it is important to check whether the external toolchain provided by the user actually uses the ABI that has been selected in the Buildroot configuration. This commit introduces such a check by looking at the 'Tag_ABI_VFP_args' tag of the architecture-specific section of the ELF headers. This assumes that ELF is the binary format used on ARM, which may not be the case on ARM noMMU systems (they use the FLAT binary format), but Buildroot doesn't have support for such systems at the moment. Also ensure the correct CFLAGS are passed to the cross compiler for the test, so the correct variant is used in case the toolchain is multilib. [Peter: mention CFLAGS change] Signed-off-by: Thomas Petazzoni Acked-by: "Yann E. MORIN" Signed-off-by: Peter Korsgaard --- toolchain/helpers.mk | 15 +++++++++++++++ toolchain/toolchain-external/ext-tool.mk | 5 ++++- 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/toolchain/helpers.mk b/toolchain/helpers.mk index 764c795d8..4c988a5c9 100644 --- a/toolchain/helpers.mk +++ b/toolchain/helpers.mk @@ -279,10 +279,25 @@ check_uclibc = \ # check_arm_abi = \ __CROSS_CC=$(strip $1) ; \ + __CROSS_READELF=$(strip $2) ; \ EXT_TOOLCHAIN_TARGET=`LANG=C $${__CROSS_CC} -v 2>&1 | grep ^Target | cut -f2 -d ' '` ; \ if ! echo $${EXT_TOOLCHAIN_TARGET} | grep -qE 'eabi(hf)?$$' ; then \ echo "External toolchain uses the unsuported OABI" ; \ exit 1 ; \ + fi ; \ + EXT_TOOLCHAIN_CRT1=`LANG=C $${__CROSS_CC} -print-file-name=crt1.o` ; \ + if $${__CROSS_READELF} -A $${EXT_TOOLCHAIN_CRT1} | grep -q "Tag_ABI_VFP_args:" ; then \ + EXT_TOOLCHAIN_ABI="eabihf" ; \ + else \ + EXT_TOOLCHAIN_ABI="eabi" ; \ + fi ; \ + if [ "$(BR2_ARM_EABI)" = "y" -a "$${EXT_TOOLCHAIN_ABI}" = "eabihf" ] ; then \ + echo "Incorrect ABI setting: EABI selected, but toolchain uses EABIhf" ; \ + exit 1 ; \ + fi ; \ + if [ "$(BR2_ARM_EABIHF)" = "y" -a "$${EXT_TOOLCHAIN_ABI}" = "eabi" ] ; then \ + echo "Incorrect ABI setting: EABIhf selected, but toolchain uses EABI" ; \ + exit 1 ; \ fi # diff --git a/toolchain/toolchain-external/ext-tool.mk b/toolchain/toolchain-external/ext-tool.mk index b9ae68f0a..80e03b980 100644 --- a/toolchain/toolchain-external/ext-tool.mk +++ b/toolchain/toolchain-external/ext-tool.mk @@ -125,6 +125,7 @@ endif TOOLCHAIN_EXTERNAL_CROSS=$(TOOLCHAIN_EXTERNAL_BIN)/$(TOOLCHAIN_EXTERNAL_PREFIX)- TOOLCHAIN_EXTERNAL_CC=$(TOOLCHAIN_EXTERNAL_CROSS)gcc TOOLCHAIN_EXTERNAL_CXX=$(TOOLCHAIN_EXTERNAL_CROSS)g++ +TOOLCHAIN_EXTERNAL_READELF=$(TOOLCHAIN_EXTERNAL_CROSS)readelf TOOLCHAIN_EXTERNAL_WRAPPER_ARGS = -DBR_SYSROOT='"$(STAGING_SUBDIR)"' ifeq ($(filter $(HOST_DIR)/%,$(TOOLCHAIN_EXTERNAL_BIN)),) @@ -368,7 +369,9 @@ $(STAMP_DIR)/ext-toolchain-checked: $(TOOLCHAIN_EXTERNAL_DEPENDENCIES) exit 1 ; \ fi ; \ if test x$(BR2_arm) == x"y" ; then \ - $(call check_arm_abi,$(TOOLCHAIN_EXTERNAL_CC)) ; \ + $(call check_arm_abi,\ + "$(TOOLCHAIN_EXTERNAL_CC) $(TOOLCHAIN_EXTERNAL_CFLAGS)",\ + $(TOOLCHAIN_EXTERNAL_READELF)) ; \ fi ; \ if test x$(BR2_INSTALL_LIBSTDCPP) == x"y" ; then \ $(call check_cplusplus,$(TOOLCHAIN_EXTERNAL_CXX)) ; \