cmake.bbclass: Add OECMAKE_C_LINK_FLAGS and OECMAKE_CXX_LINK_FLAGS variables

In some cases we need to specify linker flags and right
now we do not have a way to communicate that to cmake
based systems. cmake defines CMAKE_C_LINK_FLAGS and CMAKE_CXX_LINK_FLAGS
for these needs. This patch therefore defines two local variables
namely OECMAKE_C_LINK_FLAGS and OECMAKE_CXX_LINK_FLAGS which
can be altered by recipes to tweak linker flags

(From OE-Core rev: 9e00a74749ba8e1cf0d15efe8e16af60b189e080)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 4 insertions, 0 deletions

diff --git a/meta/classes/cmake.bbclass b/meta/classes/cmake.bbclass
index dcd974ab2d..eda45ddd14 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -23,6 +23,8 @@ OECMAKE_C_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CPPFLAGS}"
 OECMAKE_CXX_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CXXFLAGS} -fpermissive"
 OECMAKE_C_FLAGS_RELEASE ?= "${SELECTED_OPTIMIZATION} ${CPPFLAGS} -DNDEBUG"
 OECMAKE_CXX_FLAGS_RELEASE ?= "${SELECTED_OPTIMIZATION} ${CXXFLAGS} -DNDEBUG"
+OECMAKE_C_LINK_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CPPFLAGS} ${LDFLAGS}"
+OECMAKE_CXX_LINK_FLAGS ?= "${HOST_CC_ARCH} ${TOOLCHAIN_OPTIONS} ${CXXFLAGS} ${LDFLAGS}"
 
 OECMAKE_RPATH ?= ""
 OECMAKE_PERLNATIVE_DIR ??= ""
@@ -40,6 +42,8 @@ set( CMAKE_C_FLAGS "${OECMAKE_C_FLAGS}" CACHE STRING "CFLAGS" )
 set( CMAKE_CXX_FLAGS "${OECMAKE_CXX_FLAGS}" CACHE STRING "CXXFLAGS" )
 set( CMAKE_C_FLAGS_RELEASE "${OECMAKE_C_FLAGS_RELEASE}" CACHE STRING "CFLAGS for release" )
 set( CMAKE_CXX_FLAGS_RELEASE "${OECMAKE_CXX_FLAGS_RELEASE}" CACHE STRING "CXXFLAGS for release" )
+set( CMAKE_C_LINK_FLAGS "${OECMAKE_C_LINK_FLAGS}" CACHE STRING "LDFLAGS" )
+set( CMAKE_CXX_LINK_FLAGS "${OECMAKE_CXX_LINK_FLAGS}" CACHE STRING "LDFLAGS" )
 
 # only search in the paths provided so cmake doesnt pick
 # up libraries and tools from the native build machine