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Re: Use newer m4_map_args_{w,sep}

From: Eric Blake
Subject: Re: Use newer m4_map_args_{w,sep}
Date: Mon, 10 Nov 2008 18:52:32 +0000 (UTC)
User-agent: Loom/3.14 (

Eric Blake <ebb9 <at>> writes:

> This patch series squeezes another 4% performance improvement out of autoconf 
> (8.8 to 8.4 seconds on coreutils).
> Eric Blake (7):
>       Use more efficient macro in AT_INIT.
>       Use more efficient macros in AC_CHECK_FUNCS.
>       Use more efficient macros in AC_CHECK_HEADERS.
>       Use more efficient macros in AC_CHECK_TYPES.
>       Use more efficient macros in AC_CHECK_FILES and AC_CHECK_DECLS.
>       Use more efficient macros in AC_CONFIG_FILES.
>       Avoid some regex uses.

Now applied.

I'm also debating about improving AC_DEFINE (always) and AC_DEFINE_UNQUOTED 
(when there are no ") to use AS_ECHO rather than a here-doc, to avoid the 
forking of cat processes while building confdefs.h.

Eric Blake

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