[toolchain-target.cmake] add include_ and link_directories

There are several cmake based packages out there that use
CHECK_INCLUDE_FILES to find include files.

The problem is, that cmake only looks in the implizid search
directories, but not in the additional ones. Even if
CMAKE_FIND_ROOT_PATH is defined and points to them. Further cmake
doesn't care about "-I" or "-isystem" in CPPFLAGS.

Our solution (I'm not into cmake, but I think it's a hacky one):
define:
- include_directories
- link_directories

This has one drawback for linking. cmake thinks the paths specified in
link_directories are "implicid" linker search path. But they aren't.
Fortunately cmake cares about '-L' in LDFLAGS so it links in the end.
:P

Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/scripts/lib/ptxd_make_cmake_toolchain.sh b/scripts/lib/ptxd_make_cmake_toolchain.sh
index 68b38759f..17129341e 100644
--- a/scripts/lib/ptxd_make_cmake_toolchain.sh
+++ b/scripts/lib/ptxd_make_cmake_toolchain.sh
@@ -22,6 +22,8 @@ export PTXDIST_CMAKE_TOOLCHAIN_HOST
 # FIXME: take care about non linux
 #
 ptxd_make_cmake_toolchain_target() {
+    local sysroot_prefix="${PTXDIST_PATH_SYSROOT_PREFIX}:"
+
     SYSTEM_NAME="Linux" \
 	SYSTEM_VERSION="1" \
 	\
@@ -29,6 +31,8 @@ ptxd_make_cmake_toolchain_target() {
 	CXX="$(which "${CXX}")" \
 	\
 	SYSROOT="${PTXDIST_PATH_SYSROOT_ALL//:/ }" \
+	INCLUDE_DIRECTORIES="${sysroot_prefix//://include }" \
+	LINK_DIRECTORIES="${sysroot_prefix//://lib }" \
 	\
 	ptxd_replace_magic "${PTXDIST_TOPDIR}/config/cmake/toolchain-target.cmake.in" > "${1}"
 }