Message ID | 589769aee82434f370de47d9746aec521aab1f46.1642162312.git.fweimer@redhat.com |
---|---|
State | New |
Headers | show |
Series | Reliable CPU compatibility diagnostics in ld.so | expand |
On Fri, Jan 14, 2022 at 4:42 AM Florian Weimer via Libc-alpha <libc-alpha@sourceware.org> wrote: > > 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. > --- > Makeconfig | 9 +++++++++ > 1 file changed, 9 insertions(+) > > 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) > -- > 2.34.1 > > LGTM. Reviewed-by: H.J. Lu <hjl.tools@gmail.com> Thanks.
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)