[OE-core] [PATCH] cmake.bbclass: set archiver, linker and ranlib in toolchain.cmake

[Pascal Bach]

Setting CMAKE_AR, CMAKE_LINKER and CMAKE_RANLIB correctly in
toolchain.cmake is necessary to correctly build -native packages
using CMake.

The reason is that CMake is not able to find the above utilities by
itself because CMAKE_FIND_ROOT_PATH_MODE_PROGRAM is set to ONLY
so we need to tell it explicitly where to look.

Signed-off-by: Pascal Bach <pascal.bach at siemens.com>
---
 meta/classes/cmake.bbclass | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index 995ddf1..cae0ad2 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -13,6 +13,9 @@ inherit autotools
 # C/C++ Compiler (without cpu arch/tune arguments)
 OECMAKE_C_COMPILER ?= "`echo ${CC} | sed 's/^\([^ ]*\).*/\1/'`"
 OECMAKE_CXX_COMPILER ?= "`echo ${CXX} | sed 's/^\([^ ]*\).*/\1/'`"
+OECMAKE_AR ?= "`echo ${AR} | sed 's/^\([^ ]*\).*/\1/'`"
+OECMAKE_LINKER ?= "`echo ${LD} | sed 's/^\([^ ]*\).*/\1/'`"
+OECMAKE_RANLIB ?= "`echo ${RANLIB} | sed 's/^\([^ ]*\).*/\1/'`"
 
 # Compiler flags
 OECMAKE_C_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CFLAGS}"
@@ -35,6 +38,11 @@ set( CMAKE_SYSTEM_PROCESSOR ${TARGET_ARCH} )
 set( CMAKE_C_COMPILER ${OECMAKE_C_COMPILER} )
 set( CMAKE_CXX_COMPILER ${OECMAKE_CXX_COMPILER} )
 set( CMAKE_ASM_COMPILER ${OECMAKE_C_COMPILER} )
+# Force the use of cache here otherwise the values will be overridden (http://www.cmake.org/Bug/view.php?id=13038)
+set( CMAKE_AR ar CACHE FILEPATH "Archiver" FORCE )
+set( CMAKE_LINKER ld CACHE FILEPATH "Linker" FORCE )
+set( CMAKE_RANLIB ranlib CACHE FILEPATH "Ranlib" FORCE )
+
 set( CMAKE_C_FLAGS "${OECMAKE_C_FLAGS}" CACHE STRING "CFLAGS" )
 set( CMAKE_CXX_FLAGS "${OECMAKE_CXX_FLAGS}" CACHE STRING "CXXFLAGS" )
 set( CMAKE_ASM_FLAGS "${OECMAKE_C_FLAGS}" CACHE STRING "ASM FLAGS" )
-- 
1.9.1