Re: AM_CFLAGS

[Akim Demaille]

Alexandre Oliva <address@hidden> writes:

> On Feb 13, 2001, Tom Tromey <address@hidden> wrote:
> 
> > I don't want to remove anything from autoconf's blacklist.  Doing that
> > means we have to update autoconf whenever we change automake.
> 
> Nope.  CVS Autoconf has a macro to remove strings from the blacklist.
> 
> ifdef([m4_pattern_allow],[m4_pattern_allow([AM_CFLAGS])])
> 
> will let you refer to AM_CFLAGS in configure.in without introducing
> any dependency on CVS autoconf.

Let me nitpick a bit:

ifdef([m4_pattern_allow],
      [m4_pattern_allow([^AM_CFLAGS$])])dnl

(note the anchors too).  I insist on the dnl: currently automake dump
a long series of empty lines coming from there.  And BTW, instead of

# Autoconf 2.50 wants to disallow AM_ names.  We explicitly allow
# the ones we care about.
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_CFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_CPPFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_CXXFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_OBJCFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_FFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_RFLAGS])])
ifdef([m4_pattern_allow], [m4_pattern_allow([AM_GCJFLAGS])])

you can

# Autoconf 2.50 wants to disallow AM_ names.  We explicitly allow
# the ones we care about.
ifdef([m4_pattern_allow],
      [m4_pattern_allow([^AM_(C|CPP|CXX|OBJC|F|R|GCJ)FLAGS$])])dnl