Change in ...coreboot[master]: util/xcompile/xcompile: apply -march to clang as well as gcc

[Patrick Georgi (Code Review)]

Patrick Georgi has submitted this change and it was merged. ( https://review.coreboot.org/c/coreboot/+/32923 )

Change subject: util/xcompile/xcompile: apply -march to clang as well as gcc
......................................................................

util/xcompile/xcompile: apply -march to clang as well as gcc

For x64 and x86_32 configurations, apply the -march flag to both GCC and
Clang flags.

This solves the problem of Clang-compiled coreboot failing due to Clang
emitting SSE instructions for code that is executed while SSE is not
enabled.

This patch takes functionality targeted for GCC configurations and moves
it down a few lines, modifying CFLAGS instead of GCC_CFLAGS in order
that it applies to both GCC and Clang.

This is an alternate patch to CB:32887.

Signed-off-by: Alan Green 
Change-Id: I6a6a6136b01a64d46f730ed19ebbeaadaf2183df
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32923
Tested-by: build bot (Jenkins) 
Reviewed-by: Paul Menzel 
Reviewed-by: Patrick Georgi 
Reviewed-by: Kyösti Mälkki 
---
M util/xcompile/xcompile
1 file changed, 28 insertions(+), 27 deletions(-)

Approvals:
  build bot (Jenkins): Verified
  Patrick Georgi: Looks good to me, approved
  Kyösti Mälkki: Looks good to me, but someone else must approve
  Paul Menzel: Looks good to me, but someone else must approve

diff --git a/util/xcompile/xcompile b/util/xcompile/xcompile
index 4a29cdd..40356d9 100755
--- a/util/xcompile/xcompile
+++ b/util/xcompile/xcompile
@@ -227,33 +227,6 @@
 GCC_CFLAGS_${TARCH}:=${CFLAGS_GCC}
 GCC_COMPILER_RT_${TARCH}:=${CC_RT_GCC}
 GCC_COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_GCC}
-EOF
-
-# Generally the x86 should build for i686 -- no sse/mmx
-# instructions since SMM modules are compiled using these
-# flags. Note that this doesn't prevent a project using
-# xcompile to explicitly specify -mmsse, etc flags.
-# The Quark processor doesn't support the instructions
-# introduced with the Pentium 6 architecture, so allow it
-# to use i586 instead.
-if [ "${TARCH}" = "x86_64" ]; then
-cat <<EOF
-	GCC_CFLAGS_${TARCH} += -march=nocona -malign-data=abi
-EOF
-fi
-
-if [ "${TARCH}" = "x86_32" ]; then
-cat <<EOF
-
-ifneq ($(CONFIG_USE_MARCH_586)$(CONFIG_LP_USE_MARCH_586),)
-	GCC_CFLAGS_${TARCH} += -march=i586
-else
-	GCC_CFLAGS_${TARCH} += -march=i686
-endif
-EOF
-fi
-
-cat <<EOF

# Clang
 CLANG_CC_${TARCH}:=${CLANG}
@@ -265,6 +238,7 @@
 CLANG_COMPILER_RT_${TARCH}:=${CC_RT_CLANG}
 CLANG_COMPILER_RT_FLAGS_${TARCH}:=${CC_RT_EXTRA_CLANG}

+# GCC/Clang Common
 ifeq ($(CONFIG_COMPILER_GCC)$(CONFIG_LP_COMPILER_GCC),y)
    CC_${TARCH}:=$(GCC_CC_${TARCH})
    CFLAGS_${TARCH}:=$(GCC_CFLAGS_${TARCH})
@@ -276,6 +250,33 @@
    COMPILER_RT_${TARCH}:=$(CLANG_COMPILER_RT_${TARCH})
    COMPILER_RT_FLAGS_${TARCH}:=$(CLANG_COMPILER_RT_FLAGS_${TARCH})
 endif
+EOF
+
+# Generally the x86 should build for i686 -- no sse/mmx
+# instructions since SMM modules are compiled using these
+# flags. Note that this doesn't prevent a project using
+# xcompile to explicitly specify -mmsse, etc flags.
+# The Quark processor doesn't support the instructions
+# introduced with the Pentium 6 architecture, so allow it
+# to use i586 instead.
+if [ "${TARCH}" = "x86_64" ]; then
+cat <<EOF
+	CFLAGS_${TARCH} += -march=nocona -malign-data=abi
+EOF
+fi
+
+if [ "${TARCH}" = "x86_32" ]; then
+cat <<EOF
+
+ifneq ($(CONFIG_USE_MARCH_586)$(CONFIG_LP_USE_MARCH_586),)
+	CFLAGS_${TARCH} += -march=i586
+else
+	CFLAGS_${TARCH} += -march=i686
+endif
+EOF
+fi
+
+cat <<EOF

CPP_${TARCH}:=${GCCPREFIX}cpp
 AS_${TARCH}:=${GCCPREFIX}as ${ASFLAGS}