Nonrecursive build within gcc directory (revised)
Fri Oct 27 14:24:00 GMT 2000
On Fri, Oct 27, 2000 at 12:14:58AM -0700, Mark Mitchell wrote:
> Zack --
> That's a lot of gobbledygook, but it looks OK to me.
That's Make for you :)
> You should also try a parallel build -- but that should actually
> work better since you're exposing more of the dependencies -- that's
> the whole point of the "Recursive Make Considered Harmful" paper.
I have in fact done a parallel build. I don't have a multiprocessor,
so it probably didn't hit all the possible races, but I'm confident
HJ Lu will tell us about them.
> Go ahead and check it in. We'll work out the kinks over the next
> few days.
Done. Here's the final changelog.
* configure.in: If not NO_MINUS_C_MINUS_O, substitute
OUTPUT_OPTION with '-o $@'. Make zlibdir, zlibinc relative to
top level. Kill oldstyle_subdirs. Do not include
$srcdir/$s/Makefile.in in all_lang_makefiles, but do include
$outputs. Do not run configure.lang from config.status.
Rearrange warning-flag logic to correspond to what the
makefile wants. Put special vax stage1 options in
@stage1_flags@ not @stage1_warn_cflags@. Don't do anything
with extra_c_objs, extra_cxx_objs, or extra_cpp_objs.
(--enable-c-cpplib): AC_SUBST(maybe_cpplib) with "libcpp.a" if
switch is given, nothing otherwise.
* configure.lang: Delete.
* Makefile.in: Expunge all traces of extra_c_objs,
extra_cxx_objs, and extra_cpp_objs. Set MAYBE_CPPLIB from
@maybe_cpplib@. Add $(MAYBE_CPPLIB) to C_AND_OBJC_OBJS. Set
warning options via a three level scheme so that -pedantic and
-Wtraditional are not used for non-C front ends: LOOSE_WARN,
STRICT1_WARN, STRICT2_WARN -> $(@D)-warn, GCC_WARN_CFLAGS ->
WARN_CFLAGS. Distinguish STAGE1_CFLAGS from BOOT_CFLAGS.
Add -I$(@D) and -I$(srcdir)/$(@D) to INCLUDES.
Set OUTPUT_OPTION, ZLIB, ZLIBINC. Do not set P,
LANG_FLAGS_TO_PASS. Add OUTPUT_OPTION to all object-file
generation rules. Wrap all rules that change the current
directory in parentheses; pmake doesn't spawn a new shell for
each command. Expunge all references to $(P). When one
command depends on another and they're run all at once, use &&
to separate them, not ;. Add libgcc_s$(SHLIB_EXT) to files
deleted on make clean. Force OUTPUT_OPTION='-o $@' in stage2
* cp/Make-lang.in, f/Make-lang.in, java/Make-lang.in,
objc/Make-lang.in: Wrap all rules that change the current
directory in parentheses. Expunge all references to $(P).
When one command depends on another and they're run all at
once, use && to separate them, not ;. Add OUTPUT_OPTION to
all object-file generation rules. Delete obsolete variables.
Move all build rules here from the corresponding Makefile.in and
adapt to the new environment.
* cp/Makefile.in, f/Makefile.in, java/Makefile.in, objc/Makefile.in:
* cp/config-lang.in, f/config-lang.in, java/config-lang.in:
Delete outputs= line.
More information about the Gcc-patches