Re: Bug when specifying --disable-dependency-tracking (AM_DEP_TRACK)

[Robert Boehne]

CVS version of aclocal.m4 doesn't match CVS m4/depend.m4,
could that cause a problem?

Robert Boehne wrote:
> 
> Hello,
> 
> There is a bit of a problem in CVS Automake (Today's) when
> --disable-dependency-tracking is specified to configure.
> If dependency tracking rules have been added to Makefile.in,
> the rules created have @AMDEPBACKSLASH@ at the end of the
> lines that tell depcomp the required variables source,
> depfile, and depmode.  'depcomp' fails (hence so does the build
> if these variables are not specified when it is invoked.
> Currently, when --disable-dependency-tracking is specified,
> depmode is set to 'none', but then AM_DEP_TRACK removes
> the line continuation backslashes from the make rule.
> A quick fix is to comment out the test around AMDEPBACKSLASH
> #if test "x$enable_dependency_tracking" != xno; then
>   am_depcomp="$ac_aux_dir/depcomp"
>   AMDEPBACKSLASH='\'
> #fi
> This unconditionally adds the backslashes so depcomp doesn't fail.
>   I'm not sure if the maintainers would prefer a different
> solution, so no patch is pending unless you ask.
> 
> Thanks!
> 
> Robert
> 
> from Makefile.in:
> 
> .c.o:
>         source='$<' object='$@' libtool=no @AMDEPBACKSLASH@
>         depfile='$(DEPDIR)/$*.Po' tmpdepfile='$(DEPDIR)/$*.TPo'
> @AMDEPBACKSLASH@
>         $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
>         $(COMPILE) -c -o $@ `test -f $< || echo '$(srcdir)/'`$<
> 
> from CVS m4/depend.m4:
> 
> # AM_DEP_TRACK
> # ------------
> AC_DEFUN([AM_DEP_TRACK],
> [AC_ARG_ENABLE(dependency-tracking,
> [  --disable-dependency-tracking Speeds up one-time builds
>   --enable-dependency-tracking  Do not reject slow dependency
> extractors])
> if test "x$enable_dependency_tracking" != xno; then
>   am_depcomp="$ac_aux_dir/depcomp"
>   AMDEPBACKSLASH='\'
> fi
> AM_CONDITIONAL([AMDEP], [test "x$enable_dependency_tracking" != xno])
> pushdef([subst], defn([AC_SUBST]))
> subst(AMDEPBACKSLASH)
> popdef([subst])
> ])
> 
> --
> Robert Boehne             Software Engineer
> Ricardo Software   Chicago Technical Center
> TEL: (630)789-0003 x. 238
> FAX: (630)789-0127
> email:  address@hidden

-- 
Robert Boehne             Software Engineer
Ricardo Software   Chicago Technical Center
TEL: (630)789-0003 x. 238
FAX: (630)789-0127
email:  address@hidden