Detecting essential build tools (gawk)

[Mark Wielaard]

Hi,

While trying to resolve
http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=36
I found that the configure checks didn't fail when essential tools
weren't found, so I introduced a new autoconf macro FIND_TOOL that does
error out when any tool isn't found:

2007-07-08  Mark Wielaard  <mark at klomp.org>

    * acinclude.m4 (FIND_TOOL): New macro.
    * configure.ac: Use FIND_TOOL for essential tools, add gawk check.
    * configure: Regenerated.
    * Makefile.in: Likewise.

This doesn't really close the bug though, since I haven't actually
looked into why we require gawk explicitly and now any awk. So I kept
the bug open for now.

I also added a check for the alsa headers that were used in the build:

2007-07-08  Mark Wielaard  <mark at klomp.org>

        * acinclude.m4 (CHECK_HEADERS): Add check for alsa/asoundlib.h.
        * configure: Regenerated.

Which closes http://icedtea.classpath.org/bugzilla/show_bug.cgi?id=35

Cheers,

Mark