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From: "hsuhau617 at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libgcc/99157] New: [ARM] libgcc -mcmse check always fail
Date: Fri, 19 Feb 2021 07:47:42 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99157

            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 =3D _thumb1_case_sqi _thumb1_case_uqi
_thumb1_case_shi \

 HAVE_CMSE:=3D$(findstring __ARM_FEATURE_CMSE,$(shell $(gcc_compile_bare) -=
dM -E
- </dev/null))
 HAVE_V81M:=3D$(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:=3D-mcmse
 endif=