tbb: check the version of the cross gcc instead of host gcc

When cross compiling on linux with gcc, the host gcc was used instead of
the cross gcc to set compilation flags according to gcc version.

Signed-off-by: Gregory Vimont <gregory.vimont@softbankrobotics.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

2 files changed, 58 insertions, 0 deletions

diff --git a/meta-oe/recipes-support/tbb/tbb.bb b/meta-oe/recipes-support/tbb/tbb.bb
index bad9481f7..f87010401 100644
--- a/meta-oe/recipes-support/tbb/tbb.bb
+++ b/meta-oe/recipes-support/tbb/tbb.bb
@@ -13,6 +13,7 @@ PV = "${PRDATE}+${SRCPV}"
 SRC_URI = "git://github.com/01org/tbb;branch=${BRANCH} \
            file://cross-compile.patch \
            file://0001-mallinfo-is-glibc-specific-API-mark-it-so.patch \
+           file://0002-linux-Fix-gcc-version-check.patch \
            file://tbb.pc \
 "
 
diff --git a/meta-oe/recipes-support/tbb/tbb/0002-linux-Fix-gcc-version-check.patch b/meta-oe/recipes-support/tbb/tbb/0002-linux-Fix-gcc-version-check.patch
new file mode 100644
index 000000000..9824b61e9
--- /dev/null
+++ b/meta-oe/recipes-support/tbb/tbb/0002-linux-Fix-gcc-version-check.patch
@@ -0,0 +1,57 @@
+From aee098f1bf0511c6b5544de3170a9e8b51673b60 Mon Sep 17 00:00:00 2001
+From: Pierre Le Magourou <plemagourou@softbankrobotics.com>
+Date: Tue, 23 Jan 2018 15:25:50 +0100
+Subject: [PATCH] linux.gcc: Fix cross compilation error.
+
+When cross compiling on linux with gcc, the host gcc was used instead of
+the cross gcc to set compilation flags according to gcc version.
+
+When the cross gcc was in version 5.X and the host gcc in version 7.X,
+tbb was compiled with the -flifetime-dse=1 flag that does not exist on
+gcc 5.X.
+---
+ build/linux.gcc.inc | 10 +++++-----
+ 1 file changed, 5 insertions(+), 5 deletions(-)
+
+diff --git a/build/linux.gcc.inc b/build/linux.gcc.inc
+index 5c1889c..a4d6698 100644
+--- a/build/linux.gcc.inc
++++ b/build/linux.gcc.inc
+@@ -41,29 +41,29 @@ LINK_FLAGS = -Wl,-rpath-link=. -rdynamic
+ C_FLAGS = $(CPLUS_FLAGS)
+ 
+ # gcc 4.2 and higher support OpenMP
+-ifneq (,$(shell gcc -dumpversion | egrep  "^(4\.[2-9]|[5-9])"))
++ifneq (,$(shell $(CC) -dumpversion | egrep  "^(4\.[2-9]|[5-9])"))
+     OPENMP_FLAG = -fopenmp
+ endif
+ 
+ # gcc 4.8 and later support RTM intrinsics, but require command line switch to enable them
+-ifneq (,$(shell gcc -dumpversion | egrep  "^(4\.[8-9]|[5-9])"))
++ifneq (,$(shell $(CC) -dumpversion | egrep  "^(4\.[8-9]|[5-9])"))
+     RTM_KEY = -mrtm
+ endif
+ 
+ # gcc 4.0 and later have -Wextra that is used by some our customers.
+-ifneq (,$(shell gcc -dumpversion | egrep  "^([4-9])"))
++ifneq (,$(shell $(CC) -dumpversion | egrep  "^([4-9])"))
+     TEST_WARNING_KEY += -Wextra
+ endif
+ 
+ # gcc 5.0 and later have -Wsuggest-override option
+ # enable it via a pre-included header in order to limit to C++11 and above
+-ifneq (,$(shell gcc -dumpversion | egrep  "^([5-9])"))
++ifneq (,$(shell $(CC) -dumpversion | egrep  "^([5-9])"))
+     INCLUDE_TEST_HEADERS = -include $(tbb_root)/src/test/harness_preload.h
+ endif
+ 
+ # gcc 6.0 and later have -flifetime-dse option that controls
+ # elimination of stores done outside the object lifetime
+-ifneq (,$(shell gcc -dumpversion | egrep  "^([6-9])"))
++ifneq (,$(shell $(CC) -dumpversion | egrep  "^([6-9])"))
+     # keep pre-contruction stores for zero initialization
+     DSE_KEY = -flifetime-dse=1
+ endif
+-- 
+2.15.1
+