cmake: in SDK use OE env var to set default toolchain

Patch the location in cmake where the toolchain file is loaded
to use the (new) OE_CMAKE_TOOLCHAIN_FILE variable to select a default
toolchain if no toolchain has been specified. The cmake alias is
removed.

The alternatives:

 - shell alias fails when cmake is called indirectly (ex: a makefile
   managing several projects which calls cmake for some of them)
   because aliases are not inherited

 - wrapper script that unconditionally adds "-D..." breaks cmake's
   build tests and many other things as it causes cmake to believe it
   should be configuring things when it should not be. For example,
   `cmake -DCMAKE_TOOLCHAIN_FILE=... --build .` does not work (note
   that this also breaks people directly using `cmake --build .` with
   the current alias).

(From OE-Core rev: da60be3768e7183794d63548166d107dbd0a4973)

Signed-off-by: Cody P Schafer <dev@codyps.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh b/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh
index 0eb56b66fa..64b6cf3c6a 100644
--- a/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh
+++ b/meta/recipes-devtools/cmake/cmake/environment.d-cmake.sh
@@ -1 +1 @@
-alias cmake="cmake -DCMAKE_TOOLCHAIN_FILE=$OECORE_NATIVE_SYSROOT/usr/share/cmake/OEToolchainConfig.cmake"
+export OE_CMAKE_TOOLCHAIN_FILE="$OECORE_NATIVE_SYSROOT/usr/share/cmake/OEToolchainConfig.cmake"