compiler-rt: Fix build on aarch64

Pass armv8.1-a for march when using crc instruction

Fix #38

Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 39 insertions, 0 deletions

diff --git a/recipes-devtools/clang/compiler-rt/0005-Pass-march-armv8.1-a-instead-of-mcrc.patch b/recipes-devtools/clang/compiler-rt/0005-Pass-march-armv8.1-a-instead-of-mcrc.patch
new file mode 100644
index 0000000..9f1ef38
--- /dev/null
+++ b/recipes-devtools/clang/compiler-rt/0005-Pass-march-armv8.1-a-instead-of-mcrc.patch
@@ -0,0 +1,38 @@
+From ce33b77707e708348311aea2a9b2401ed4685aa2 Mon Sep 17 00:00:00 2001
+From: Khem Raj <raj.khem@gmail.com>
+Date: Thu, 20 Jul 2017 12:14:03 -0700
+Subject: [PATCH 5/5] Pass -march=armv8.1-a instead of -mcrc
+
+When we pass -mcrc it does not cause driver to
+pass right options to assembler, especially when
+using GNU assembler, is used this causes assembler
+failures to recognise crc instructions since the
+default -march option passed it armv8-a
+
+/tmp/scudo_crc32-9e9612.s:14: Error: selected processor does not support `crc32cx w0,w0,x1'
+
+Adding -march=armv8.1-a forces the driver to pass
+-march=armv8.1-a to assembler as well, which fixes
+this issue
+
+Signed-off-by: Khem Raj <raj.khem@gmail.com>
+---
+ lib/scudo/CMakeLists.txt | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/lib/scudo/CMakeLists.txt b/lib/scudo/CMakeLists.txt
+index 14c199fa8..857bdccd3 100644
+--- a/lib/scudo/CMakeLists.txt
++++ b/lib/scudo/CMakeLists.txt
+@@ -26,7 +26,7 @@ endif()
+ # Enable the AArch64 CRC32 feature for scudo_crc32.cpp, if available.
+ # Note that it is enabled by default starting with armv8.1-a.
+ if (COMPILER_RT_HAS_MCRC_FLAG)
+-  set_source_files_properties(scudo_crc32.cpp PROPERTIES COMPILE_FLAGS -mcrc)
++  set_source_files_properties(scudo_crc32.cpp PROPERTIES COMPILE_FLAGS -march=armv8.1-a)
+ endif()
+ 
+ if(COMPILER_RT_HAS_SCUDO)
+-- 
+2.13.3
+
diff --git a/recipes-devtools/clang/compiler-rt_git.bb b/recipes-devtools/clang/compiler-rt_git.bb
index 7f9d5db..3be2fe8 100644
--- a/recipes-devtools/clang/compiler-rt_git.bb
+++ b/recipes-devtools/clang/compiler-rt_git.bb
@@ -20,6 +20,7 @@ SRC_URI =  "\
     file://0002-Simplify-cross-compilation.-Don-t-use-native-compile.patch \
     file://0003-Disable-tsan-on-OE-glibc.patch \
     file://0004-cmake-mips-Do-not-specify-target-with-OE.patch \
+    file://0005-Pass-march-armv8.1-a-instead-of-mcrc.patch \
 "
 
 SRCREV_FORMAT = "compiler-rt"