cmake.bbclass: append includedir to implicit include dirs

This resolves issues with paths being marked as system includes that
differ from /usr/include but are considered implicit by the toolchain.
This enables developers to add directories to system includes
to supress compiler compiler warnings from them.

(From OE-Core rev: 9c2227d5d960f93e00791157354f0c920fbecf39)

Signed-off-by: Michael Ho <Michael.Ho@bmw.de>
Cc: Pascal Bach <pascal.bach@siemens.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 b364d2bc20..f22d90a1d5 100644
--- a/meta/classes/cmake.bbclass
+++ b/meta/classes/cmake.bbclass
@@ -108,6 +108,10 @@ list(APPEND CMAKE_MODULE_PATH "${STAGING_DATADIR}/cmake/Modules/")
 # add for non /usr/lib libdir, e.g. /usr/lib64
 set( CMAKE_LIBRARY_PATH ${libdir} ${base_libdir})
 
+# add include dir to implicit includes in case it differs from /usr/include
+list(APPEND CMAKE_C_IMPLICIT_INCLUDE_DIRECTORIES ${includedir})
+list(APPEND CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES ${includedir})
+
 EOF
 }