Commit c7bc6380 authored Feb 15, 2021 by Anas Nashif

compiler: do not allow expansion-to-defined



'-Wexpansion-to-defined'
     Warn whenever 'defined' is encountered in the expansion of a macro
     (including the case where the macro is expanded by an '#if'
     directive).  Such usage is not portable.  This warning is also
     enabled by '-Wpedantic' and '-Wextra'.

This is enabled by default in llvm but not in gcc. Given that it is 'not
portable', lets disallow this in gcc and keep both compilers in sync.

Signed-off-by: Anas Nashif <anas.nashif@intel.com>

parent c860b868

cmake/compiler/gcc/compiler_flags.cmake

+3 −0

Original line number	Diff line number	Diff line
		@@ -39,6 +39,9 @@ check_set_compiler_property(APPEND PROPERTY warning_base -Wno-pointer-sign)
		# Prohibit void pointer arithmetic. Illegal in C99
		check_set_compiler_property(APPEND PROPERTY warning_base -Wpointer-arith)

		# not portable
		check_set_compiler_property(APPEND PROPERTY warning_base -Wexpansion-to-defined)

		if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER "9.1.0")
		set_compiler_property(APPEND PROPERTY warning_base
		# FIXME: Remove once #16587 is fixed

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