Re: [PATCH] Makefile: read configuration earlier

[Junio C Hamano <gitster@pobox.com>]

"brian m. carlson" <sandals@crustytoothpaste.net> writes:

> When building with WITH_BREAKING_CHANGES, we need that option set before
> we generate the list of binaries to build, since it affects whether
> git-whatchanged is built.  That in turn, affects whether t1517 passes,
> since it does not if we are in breaking-changes mode and git-whatchanged
> or git-pack-redundant exist.  Load the configuration settings earlier in
> the Makefile so that we properly honor this value when building.
>
> Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net>
> ---
> I noticed that Peff's patches didn't quite fix the problem for me and I
> think we need this on top to make the tests pass properly.
>
>  Makefile | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)

This is a scary patch because its correctness depends on what is
between lines 780-1050.  It turns out that this now lets config.mak*
to set quite a lot of symbols to affect the outcome:

 * PROGRAM_OBJS, BUILT_INS, TEST_BUILTIN_OBJS
 * WITH_BREAKING_CHANGES
 * SHELL_PATH
 * PERL_PATH
 * PYTHON_PATH
 * NO_RUST
 * DEBUG
 * uname_S?????
 * SPARSE_FLAGS
 * SPATCH_INCLUDE_FLAGS

Especially curious is that currently there is this bit:

	ifeq ($(uname_S),Windows)
	RUST_LIB_NAME = gitcore.lib
	else
	RUST_LIB_NAME = libgitcore.a
	endif

that comes WAY BEFORE config.mak.uname is included.  If the location
to include these files matter, then how could this bit have been
working?  I have no idea and since I have no access to Windows
development box so I wouldn't know.

> diff --git a/Makefile b/Makefile
> index 98e995e4be..6bfa461aeb 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -781,6 +781,10 @@ clean-perl-script:
>  clean-python-script:
>  	$(RM) $(SCRIPT_PYTHON_GEN)
>  
> +include config.mak.uname
> +-include config.mak.autogen
> +-include config.mak
> +
>  SCRIPTS = $(SCRIPT_SH_GEN) \
>  	  $(SCRIPT_PERL_GEN) \
>  	  $(SCRIPT_PYTHON_GEN) \
> @@ -1050,10 +1054,6 @@ GIT-SPATCH-DEFINES: FORCE
>  		echo "$$FLAGS" >GIT-SPATCH-DEFINES; \
>              fi
>  
> -include config.mak.uname
> --include config.mak.autogen
> --include config.mak
> -
>  ifdef DEVELOPER
>  include config.mak.dev
>  endif