cmake: toolchain_cc_imacros: don't use space separated arguments
Because CMake explicitly deduplicates arguments, it is not possible
to use toolchain_cc_imacros() multiple times as the later "-imacros"
are stripped away, leaving the associated file arguments dangling.
The documented workaround in the CMake manual involves some "SHELL:..."
construct but that doesn't get through zephyr_compile_options()
undammaged.
Let's simply remove this issue altogether by replacing "-imacros x.h"
with the joined form "--imacros=x.h" instead. Both gcc and clang
support this syntax.
FYI, this joined form is also available for other arguments such as:
-include x.h --> --include=x.h
-A foo --> --assert=foo
-D foo --> --define-macro=foo
-U foo --> --undefine-macro=foo
Etc.
Signed-off-by: Nicolas Pitre <npitre@baylibre.com>
diff --git a/cmake/compiler/gcc/target_imacros.cmake b/cmake/compiler/gcc/target_imacros.cmake
index 31eadf2..8040404 100644
--- a/cmake/compiler/gcc/target_imacros.cmake
+++ b/cmake/compiler/gcc/target_imacros.cmake
@@ -4,6 +4,6 @@
macro(toolchain_cc_imacros header_file)
- zephyr_compile_options(-imacros ${header_file})
+ zephyr_compile_options(--imacros=${header_file})
endmacro()
