[OE-core] [PATCHv2 03/21] classes/cmake: add arch conversion routine

[Alexander Kanavin]

cmake expects target architecture strings in the format of uname(2),
which do not always match TARGET_ARCH (e.g. powerpc vs ppc).

Signed-off-by: Alexander Kanavin <alexander.kanavin at linux.intel.com>
---
 meta/classes/cmake.bbclass | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index 1ebb936..40115a0 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -27,12 +27,22 @@ OECMAKE_RPATH ?= ""
 OECMAKE_PERLNATIVE_DIR ??= ""
 OECMAKE_EXTRA_ROOT_PATH ?= ""
 
+# CMake expects target architectures in the format of uname(2),
+# which do not always match TARGET_ARCH, so all the necessary
+# conversions should happen here.
+def map_target_arch_to_uname_arch(target_arch):
+    if target_arch == "powerpc":
+        return "ppc"
+    if target_arch == "powerpc64":
+        return "ppc64"
+    return target_arch
+
 cmake_do_generate_toolchain_file() {
 	cat > ${WORKDIR}/toolchain.cmake <<EOF
 # CMake system name must be something like "Linux".
 # This is important for cross-compiling.
 set( CMAKE_SYSTEM_NAME `echo ${TARGET_OS} | sed -e 's/^./\u&/' -e 's/^\(Linux\).*/\1/'` )
-set( CMAKE_SYSTEM_PROCESSOR ${TARGET_ARCH} )
+set( CMAKE_SYSTEM_PROCESSOR ${@map_target_arch_to_uname_arch(d.getVar('TARGET_ARCH', True))} )
 set( CMAKE_C_COMPILER ${OECMAKE_C_COMPILER} )
 set( CMAKE_CXX_COMPILER ${OECMAKE_CXX_COMPILER} )
 set( CMAKE_ASM_COMPILER ${OECMAKE_C_COMPILER} )
-- 
2.1.4