https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99157
Bug ID: 99157
Summary: [ARM] libgcc -mcmse check always fail
Product: gcc
Version: 10.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libgcc
Assignee: unassigned at gcc dot gnu.org
Reporter: hsuhau617 at gmail dot com
Target Milestone: ---
When checking -mcmse support, it will always fail.
Because it checks the return value with "$?", but in makefile it should be
"$$?".
I have a simple patch for the bug:
--- a/libgcc/config/arm/t-arm
+++ b/libgcc/config/arm/t-arm
@@ -4,7 +4,7 @@ LIB1ASMFUNCS = _thumb1_case_sqi _thumb1_case_uqi
_thumb1_case_shi \
HAVE_CMSE:=$(findstring __ARM_FEATURE_CMSE,$(shell $(gcc_compile_bare) -dM -E
- </dev/null))
HAVE_V81M:=$(findstring armv8.1-m.main,$(gcc_compile_bare))
-ifeq ($(shell $(gcc_compile_bare) -E -mcmse - </dev/null >/dev/null
2>/dev/null; echo $?),0)
+ifeq ($(shell $(gcc_compile_bare) -E -mcmse - </dev/null >/dev/null
2>/dev/null; echo $$?),0)
CMSE_OPTS:=-mcmse
endif
