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Re: genflags
- From: Ian Lance Taylor <iant at google dot com>
- To: Hendrik Greving <hendrik dot greving dot intel at gmail dot com>
- Cc: "gcc-help at gcc dot gnu dot org" <gcc-help at gcc dot gnu dot org>
- Date: Fri, 2 Aug 2013 10:15:09 -0700
- Subject: Re: genflags
- References: <CANc4vhrR9w97VK0OAFq2Li-aBc1SZGHqZk-z48-o_rF+7E39jA at mail dot gmail dot com>
On Fri, Aug 2, 2013 at 9:23 AM, Hendrik Greving
<hendrik.greving.intel@gmail.com> wrote:
>
> I am looking at some build dependencies, my build apparently is
> missing a dependency on genflags->insn-flags.h. c-opts.o is compiled
> before insn-flags.h was generated. Anybody has an idea why? Also, I am
> searching for who is actually calling genflags (I am already
> desperately doing a simple 'grep' and haven't found it yet).
You neglected to mention what version of GCC you are building and
whether you have any local changes.
That said, I agree that it looks like in gcc/Makefile.in
c-family/c-opts.o is missing a dependency on $(TM_H) and $(TM_P_H),
although c-family/c-opts.c #includes both those files. Fixing that in
gcc/Makefile.in should fix your problem. If it does, please send in a
patch.
The file is created by these definitions in gcc/Makefile.in:
simple_rtl_generated_h = insn-attr.h insn-attr-common.h insn-codes.h \
insn-config.h insn-flags.h
simple_generated_h = $(simple_rtl_generated_h) insn-constants.h
$(simple_generated_h): insn-%.h: s-%; @true
$(simple_generated_h:insn-%.h=s-%): s-%: build/gen%$(build_exeext)
$(RUN_GEN) build/gen$*$(build_exeext) $(md_file) \
$(filter insn-conditions.md,$^) > tmp-$*.h
$(SHELL) $(srcdir)/../move-if-change tmp-$*.h insn-$*.h
$(STAMP) s-$*
This is admittedly hard to follow if you don't know GNU make, but what
it boils down to is that insn-flags.h is created by running
$(RUN_GEN) build/genflags $(md_file)
Ian