From be30dd89926d5dd19d72f90c1586b0e2557fde43 Mon Sep 17 00:00:00 2001
From: Christophe Lyon <christophe.lyon@linaro.org>
Date: Wed, 24 Feb 2021 15:51:52 +0000
Subject: [PATCH] arm: Fix CMSE support detection in libgcc (PR target/99157)

As discussed in the PR, the Makefile fragment lacks a double '$' to
get the return-code from GCC invocation, resulting is CMSE support
missing from multilibs.

I checked that the simple patch proposed in the PR fixes the problem.

2021-02-23  Christophe Lyon  <christophe.lyon@linaro.org>
	    Hau Hsu  <hsuhau617@gmail.com>

	PR target/99157
	libgcc/
	* config/arm/t-arm: Fix cmse support detection.
---
 libgcc/config/arm/t-arm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libgcc/config/arm/t-arm b/libgcc/config/arm/t-arm
index 364f40ebe7f..3625a2590be 100644
--- 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