From ef7c6d42fe163a5e49a478c43e655ce4633fa5ba Mon Sep 17 00:00:00 2001 From: Florian Weimer Date: Fri, 14 Jan 2022 16:09:20 +0100 Subject: Generate gcc-macros.h The file can be used to check the effect of the default compiler flags on code generation even in areas of the build that uses non-default compiler flags. Reviewed-by: H.J. Lu --- Makeconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'Makeconfig') diff --git a/Makeconfig b/Makeconfig index 9b6fc6b08f..2e79077343 100644 --- a/Makeconfig +++ b/Makeconfig @@ -1202,6 +1202,15 @@ $(common-objpfx)dl-tunable-list.stmp: \ touch $@ endif +# Dump the GCC macros used by the default compiler flags to a header +# file, so that they can be inspected when using different compiler +# flags. Add the GCCMACRO prefix to make these macro names unique. +$(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status + $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null +$(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in + sed 's/^#define /#define GCCMACRO/' < $< > $@ +before-compile += $(common-objpfx)gcc-macros.h + # Generate version maps, but wait until sysdep-subdirs is known ifeq ($(sysd-sorted-done),t) ifeq ($(build-shared),yes) -- cgit 1.4.1