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32 lines
1.2 KiB
32 lines
1.2 KiB
commit ef7c6d42fe163a5e49a478c43e655ce4633fa5ba |
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Author: Florian Weimer <fweimer@redhat.com> |
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Date: Fri Jan 14 16:09:20 2022 +0100 |
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Generate gcc-macros.h |
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The file can be used to check the effect of the default compiler |
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flags on code generation even in areas of the build that uses |
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non-default compiler flags. |
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Reviewed-by: H.J. Lu <hjl.tools@gmail.com> |
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diff --git a/Makeconfig b/Makeconfig |
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index 8bc5540292c7b6fa..99898a632a64be91 100644 |
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--- a/Makeconfig |
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+++ b/Makeconfig |
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@@ -1202,6 +1202,15 @@ $(common-objpfx)dl-tunable-list.stmp: \ |
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touch $@ |
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endif |
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+# Dump the GCC macros used by the default compiler flags to a header |
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+# file, so that they can be inspected when using different compiler |
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+# flags. Add the GCCMACRO prefix to make these macro names unique. |
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+$(common-objpfx)gcc-macros.h.in: $(common-objpfx)config.status |
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+ $(CC) $(CFLAGS) $(CPPFLAGS) -E -dM -x c -o $@ /dev/null |
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+$(common-objpfx)gcc-macros.h: $(common-objpfx)gcc-macros.h.in |
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+ sed 's/^#define /#define GCCMACRO/' < $< > $@ |
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+before-compile += $(common-objpfx)gcc-macros.h |
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+ |
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# Generate version maps, but wait until sysdep-subdirs is known |
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ifeq ($(sysd-sorted-done),t) |
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ifeq ($(build-shared),yes)
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