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Date: Thu, 31 Jul 2008 10:48:00 -0000
From: Andrew STUBBS <andrew.stubbs@st.com>
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To: Tom Tromey <tromey@redhat.com>
Cc: gdb-patches@sources.redhat.com
Subject: Re: RFA: automatic dependency tracking
References: <m3fxq2rilz.fsf@fleche.redhat.com>
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Tom Tromey wrote:
> +# Override the settings from the main Makefile.
> +@GMAKE_TRUE@ifeq ($(DEPMODE),depmode=gcc3)
> +# Note that we put the dependencies into a .Tpo file, then move them
> +# into place if the compile succeeds.  We need this because gcc does
> +# not atomically write the dependency output file.
> +@GMAKE_TRUE@override COMPILE.post = -c -o $@ -MT $@ -MMD -MP \
> +@GMAKE_TRUE@	-MF $(DEPDIR)/$(basename $(@F)).Tpo
> +@GMAKE_TRUE@override POSTCOMPILE = @mv $(DEPDIR)/$(basename $(@F)).Tpo \
> +@GMAKE_TRUE@	$(DEPDIR)/$(basename $(@F)).Po
> +@GMAKE_TRUE@else
> +@GMAKE_TRUE@override COMPILE.pre = source='$<' object='$@' libtool=no \
> +@GMAKE_TRUE@	DEPDIR=$(DEPDIR) $(DEPMODE) $(depcomp) $(CC)
> +# depcomp handles atomicity for us, so we don't need a postcompile
> +# step.
> +@GMAKE_TRUE@override POSTCOMPILE =
> +@GMAKE_TRUE@endif

Has this been tested without depmode=gcc3 ?

I haven't tried it, but I can't find where $(depcomp) is set.

Andrew