I'm patching a Makefile.am and am thus calling autoreconf to regen the
Makefile.in. Unfortunately the configure.ac is doing advanced autoconf/m4
stuff that I don't quite understand.
configure.ac at the top has
###############################################################################
# prelude
###############################################################################
m4_include([project/project.m4sugar])
m4_define([SVNINFO],m4_esyscmd([svn info 2>/dev/null]))
m4_define([PRJ_repo_url],m4_bregexp(SVNINFO,[^URL: *\(.+\)],[\1]))
m4_define([PRJ_repo_root],m4_bregexp(SVNINFO,[^Repository Root: *\(.+\)],[\1]))
m4_define([PRJ_repo_uuid],m4_bregexp(SVNINFO,[^Repository UUID: *\(.+\)],[\1]))
m4_define([PRJ_repo_rev],m4_bregexp(SVNINFO,[^Last Changed Rev: *\(.+\)],[\1]))
m4_define([PRJ_repo_date],m4_bregexp(SVNINFO,[^Last Changed Date: *\(.+\)],[\1]))
m4_define([PRJ_repo_type],ifelse(m4_bregexp(PRJ_repo_url,[/releases/]),[-1],[developer],[stable]))
m4_define([PRJ_version_hex],m4_format([0x%04x%02x%02x],PRJ_version_major,PRJ_version_minor,PRJ_version_point))
m4_define([PRJ_snapshot],
m4_bregexp(m4_esyscmd([(test "$SNAPSHOT" = "1" && date +%Y%m%d) 2>/dev/null]),[\([0-9]+\)],[\1]))
m4_define([PRJ_repo_type],ifelse(m4_len(PRJ_snapshot),8,[snapshot],PRJ_repo_type))
m4_define([PRJ_version],ifelse(
PRJ_repo_type,[stable],m4_format([%d.%d.%d],PRJ_version_major,PRJ_version_minor,PRJ_version_point),
PRJ_repo_type,[snapshot],m4_format([%d.%d-%s],PRJ_version_major,PRJ_version_minor,PRJ_snapshot),
PRJ_repo_type,[developer],m4_format([%d.%d-r%d],PRJ_version_major,PRJ_version_minor,PRJ_repo_rev),
m4_format([%d.%d-r%d],PRJ_version_major,PRJ_version_minor,PRJ_repo_rev)))
And the included project.m4sugar is:
dnl
dnl This file defines highest-level project meta-data in autoconf M4 format.
dnl It is needed downstream by configure.ac.
dnl
define([PRJ_name], [MP4v2])
define([PRJ_name_lower], [mp4v2])
define([PRJ_name_upper], [MP4V2])
define([PRJ_url_website], [http://code.google.com/p/mp4v2])
define([PRJ_url_downloads], [http://code.google.com/p/mp4v2/downloads/list])
define([PRJ_url_discussion], [http://groups.google.com/group/mp4v2])
define([PRJ_irc], [irc://irc.freenode.net/mp4v2])
define([PRJ_bugreport], [eddyg@xxxxxxxxxxxxxxxx])
define([PRJ_version_major], [1])
define([PRJ_version_minor], [9])
define([PRJ_version_point], [1])
Autoconf 2.68 reports:
/usr/bin/m4:configure.ac:25: empty string treated as 0
/usr/bin/m4:configure.ac:26: empty string treated as 0
Coould somebody please help me understanding what is going wrong so that I
might fix the sources?
Philipp
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