cmake-native: fix to function correctly in case of eSDK

Our eSDK is expected to provide traditional SDK's functionality. But
for cmake, it could not function well in eSDK.

This problem is discovered by the assimp.py test case. The error message
is as below.

  testsdkext/tmp/sysroots/x86_64/usr/lib/libz.so: error adding symbols: file in wrong format
  collect2: error: ld returned 1 exit status

The problem is about cmake-native being unable to find the correct lib.
nativesdk-cmake has solved this problem. So make use of the solution to
solve the eSDK problem.

(From OE-Core rev: c0561e930e688890eb5feb4521b2de196137227a)

Signed-off-by: Chen Qi <Qi.Chen@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-devtools/cmake/cmake-native_3.11.4.bb

@@ -3,7 +3,12 @@ inherit native
 
 DEPENDS += "bzip2-replacement-native expat-native xz-native zlib-native curl-native"
 
-SRC_URI += "file://0004-Disable-use-of-ext2fs-ext2_fs.h-by-cmake-s-internal-.patch"
+SRC_URI += "file://0004-Disable-use-of-ext2fs-ext2_fs.h-by-cmake-s-internal-.patch \
+            file://OEToolchainConfig.cmake \
+            file://environment.d-cmake.sh \
+            file://0001-CMakeDetermineSystem-use-oe-environment-vars-to-load.patch \
+            "
+
 
 B = "${WORKDIR}/build"
 do_configure[cleandirs] = "${B}"
@@ -31,6 +36,15 @@ do_compile() {
 
 do_install() {
 	oe_runmake 'DESTDIR=${D}' install
+
+	# The following codes are here because eSDK needs to provide compatibilty
+	# for SDK. That is, eSDK could also be used like traditional SDK.
+	mkdir -p ${D}${datadir}/cmake
+	install -m 644 ${WORKDIR}/OEToolchainConfig.cmake ${D}${datadir}/cmake/
+	mkdir -p ${D}${base_prefix}/environment-setup.d
+	install -m 644 ${WORKDIR}/environment.d-cmake.sh ${D}${base_prefix}/environment-setup.d/cmake.sh
 }
 
 do_compile[progress] = "percent"
+
+SYSROOT_DIRS_NATIVE += "${datadir}/cmake ${base_prefix}/environment-setup.d"