nativesdk-cmake: Adjust toolchain paths dynamically

This patch adds a flexible way to configure the CMake in SDKs. It adds
a toolchain configuration script which supports subscripts for
extensions, as for example Qt5.

(From OE-Core rev: 484502e4e062fae1130a60626f39f5512af4c5c8)

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 33 insertions, 0 deletions

diff --git a/meta/recipes-devtools/cmake/cmake/OEToolchainConfig.cmake b/meta/recipes-devtools/cmake/cmake/OEToolchainConfig.cmake
new file mode 100644
index 0000000000..60014bbf2b
--- /dev/null
+++ b/meta/recipes-devtools/cmake/cmake/OEToolchainConfig.cmake
@@ -0,0 +1,18 @@
+set( CMAKE_SYSTEM_NAME Linux )
+set( CMAKE_C_FLAGS $ENV{CFLAGS} CACHE STRING "" FORCE )
+set( CMAKE_CXX_FLAGS $ENV{CXXFLAGS}  CACHE STRING "" FORCE )
+set( CMAKE ASM_FLAGS ${CMAKE_C_FLAGS} CACHE STRING "" FORCE )
+set( CMAKE_LDFLAGS_FLAGS ${CMAKE_CXX_FLAGS} CACHE STRING "" FORCE )
+set( CMAKE_FIND_ROOT_PATH $ENV{OECORE_TARGET_SYSROOT} $ENV{OECORE_NATIVE_SYSROOT} )
+set( CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER )
+set( CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY )
+set( CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY )
+
+string(REGEX MATCH "sysroots/([a-zA-Z0-9]+)" CMAKE_SYSTEM_PROCESSOR $ENV{SDKTARGETSYSROOT})
+string(REGEX REPLACE "sysroots/" "" CMAKE_SYSTEM_PROCESSOR ${CMAKE_SYSTEM_PROCESSOR})
+
+# Include the toolchain configuration subscripts
+file( GLOB toolchain_config_files "${CMAKE_TOOLCHAIN_FILE}.d/*.cmake" )
+foreach(config ${toolchain_config_files})
+    include(${config})
+endforeach()
diff --git a/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh b/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh
new file mode 100644
index 0000000000..0eb56b66fa
--- /dev/null
+++ b/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh
@@ -0,0 +1 @@
+alias cmake="cmake -DCMAKE_TOOLCHAIN_FILE=$OECORE_NATIVE_SYSROOT/usr/share/cmake/OEToolchainConfig.cmake"
diff --git a/meta/recipes-devtools/cmake/cmake_2.8.12.2.bb b/meta/recipes-devtools/cmake/cmake_2.8.12.2.bb
index de2ac6b219..66a6af629c 100644
--- a/meta/recipes-devtools/cmake/cmake_2.8.12.2.bb
+++ b/meta/recipes-devtools/cmake/cmake_2.8.12.2.bb
@@ -6,6 +6,10 @@ DEPENDS += "curl expat zlib libarchive"
 
 SRC_URI += "file://dont-run-cross-binaries.patch"
 
+SRC_URI_append_class-nativesdk = " \
+    file://OEToolchainConfig.cmake \
+    file://environment.d-cmake.sh"
+
 SRC_URI[md5sum] = "17c6513483d23590cbce6957ec6d1e66"
 SRC_URI[sha256sum] = "8c6574e9afabcb9fc66f463bb1f2f051958d86c85c37fccf067eb1a44a120e5e"
 
@@ -32,6 +36,16 @@ EXTRA_OECMAKE=" \
     ${@bb.utils.contains('DISTRO_FEATURES', 'largefile', '-DKWSYS_LFS_WORKS=1', '-DKWSYS_LFS_DISABLE=1', d)} \
 "
 
+do_install_append_class-nativesdk() {
+    mkdir -p ${D}${datadir}/cmake
+    install -m 644 ${WORKDIR}/OEToolchainConfig.cmake ${D}${datadir}/cmake/
+
+    mkdir -p ${D}${SDKPATHNATIVE}/environment-setup.d
+    install -m 644 ${WORKDIR}/environment.d-cmake.sh ${D}${SDKPATHNATIVE}/environment-setup.d/cmake.sh
+}
+
+FILES_${PN}_append_class-nativesdk = " ${SDKPATHNATIVE}"
+
 FILES_${PN} += "${datadir}/cmake-${CMAKE_MAJOR_VERSION}"
 FILES_${PN}-doc += "${docdir}/cmake-${CMAKE_MAJOR_VERSION}"