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[PATCH, GCC/ARM, 1/10] Fix -mcmse check in libgcc 

This patch is part of a patch series to add support for Armv8.1-M
Mainline Security Extensions architecture.

Code to detect whether cmse.c can be buit with -mcmse checks the output
of host GCC when invoked with -mcmse. However, an error from the
compiler does not prevent some minimal output so this always holds true.

2020-01-16  Mihail-Calin Ionescu  <mihail.ionescu@arm.com>
2020-01-16  Thomas Preud'homme  <thomas.preudhomme@arm.com>

	* config/arm/t-arm: Check return value of gcc rather than lack of
	output.
This commit is contained in:
Mihail Ionescu 2020-01-14 17:47:39 +00:00
parent 66aae15b4e
commit e953433f08
2 changed files with 7 additions and 1 deletions
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6
libgcc/ChangeLog
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@ -1,3 +1,9 @@
2020-01-16 Mihail-Calin Ionescu <mihail.ionescu@arm.com>
2020-01-16 Thomas Preud'homme <thomas.preudhomme@arm.com>
* config/arm/t-arm: Check return value of gcc rather than lack of
output.
2020-01-14 Georg-Johann Lay <avr@gjlay.de>
* config/avr/lib1funcs.S (skip): Simplify.

2
libgcc/config/arm/t-arm
View File

@ -3,7 +3,7 @@ LIB1ASMFUNCS = _thumb1_case_sqi _thumb1_case_uqi _thumb1_case_shi \
_thumb1_case_uhi _thumb1_case_si _speculation_barrier
HAVE_CMSE:=$(findstring __ARM_FEATURE_CMSE,$(shell $(gcc_compile_bare) -dM -E - </dev/null))
ifneq ($(shell $(gcc_compile_bare) -E -mcmse - </dev/null 2>/dev/null),)
ifeq ($(shell $(gcc_compile_bare) -E -mcmse - </dev/null >/dev/null 2>/dev/null; echo $?),0)
CMSE_OPTS:=-mcmse
endif