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As discussion in [YOCTO #14717] cmake contains a OEToolchainConfig.cmake file to configure the toolchain correctly in cross-compile build for recipes using cmake. The variable CMAKE_CXX_IMPLICIT_INCLUDE_DIRECTORIES value updates incorrectly during do_compile the code. Due to this getting sporadic error like below, fatal error: stdlib.h: No such file or directory | 75 | #include_next <stdlib.h> | | ^~~~~~~~~~ | compilation terminated. | ninja: build stopped: subcommand failed. | WARNING: exit code 1 from a shell command. As cmake already correctly initializes the variable from environment, So we have to unset it in the toolchain file to avoid overwriting the variable definition again. (From OE-Core rev: 5599eaefee3818c865d71f5b7c3cc04fc01de848) Signed-off-by: aszh07 <mail2szahir@gmail.com> Signed-off-by: Zahir Hussain <zahir.basha@kpit.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org> (cherry picked from commit 5aeada5793af53e8c93940952d4f314474dca4c2) Signed-off-by: Steve Sakoman <steve@sakoman.com>