AS_ECHO_N in util-macros

[Jeremy Huddleston]

I just noticed this when using autoconf-2.61 ... does AS_ECHO_N require a newer version of autoconf?  Can we work around that requirement?

...
configure:4924: error: possibly undefined macro: AS_ECHO_N
      If this token and others are legitimate, please use m4_pattern_allow.
      See the Autoconf documentation.
autoreconf: /usr/bin/autoconf failed with exit status: 1
...



On Jan 22, 2012, at 5:16 AM, Jon TURNEY <jturney at kemper.freedesktop.org> wrote:

> xorg-macros.m4.in |   34 +++++++++++++++++++++-------------
> 1 file changed, 21 insertions(+), 13 deletions(-)
> 
> New commits:
> commit a1809fde56e45639556a44fd3c3ef9213204c5a9
> Author: Jon TURNEY <jon.turney at dronecode.org.uk>
> Date:   Mon Jan 2 19:42:10 2012 +0000
> 
>    Cache the results of checking compiler flag support in XORG_TESTSET_CFLAG
> 
>    Since checking all those warning flags takes an amount of time I find irritating,
>    here is an attempt at caching the results of checking compiler warning flag support
> 
>    A couple of aspects which need definitely need review or testing:
> 
>    * I've tried to get things right when not the first flag in the list of alternates is
>    supported, but this really needs testing with a compiler other than gcc
> 
>    * The cache variable naming policy is a bit opaque me, so the names used may need corecting
> 
>    * I've tried to be careful, but who knows what portability sins I have committed :-)
> 
>    This change reduces the time to run the ./configure script produced from a configure.ac
>    containing just
> 
>    AC_INIT([test], 1.0)
>    XORG_COMPILER_FLAGS
>    XORG_CWARNFLAGS
>    XORG_STRICT_OPTION
>    AC_OUTPUT()
> 
>    from ~60s to ~20s on my cygwin machine, and from ~15s to ~9s on a linux VM running on the
>    same hardware
> 
>    v2: AS_TR_SH transforms characters which are invalid in shell variable names, so we don't
>    have to use sed to transform spaces ourself
> 
>    Signed-off-by: Jon TURNEY <jon.turney at dronecode.org.uk>
>    Reviewed-by: Gaetan Nadon <memsize at videotron.ca>
> 
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