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adl_FUNC_GETOPT_LONG
1.3 (2003/10/29) 0.5.57 : Installed_Packages
Alexandre Duret-Lutz <adl@gnu.org>
Check for getopt_long support.
This assume that the standard getopt.h file (from GNU libc) is available as lib/gnugetopt.h. If needed, this file will be linked as getopt.h, but we want to default to the system's getopt.h file. (See http://sources.redhat.com/ml/automake/2000-09/msg00041.html for an explanation about why using the system's getopt.h file is important.)
AC_DEFUN([adl_FUNC_GETOPT_LONG],
[AC_PREREQ(2.49)dnl
# clean out junk possibly left behind by a previous configuration
rm -f lib/getopt.h
# Check for getopt_long support
AC_CHECK_HEADERS([getopt.h])
AC_CHECK_FUNCS([getopt_long],,
[# FreeBSD has a gnugetopt library for this
AC_CHECK_LIB([gnugetopt],[getopt_long],[AC_DEFINE([HAVE_GETOPT_LONG])],
[# use the GNU replacement
AC_LIBOBJ(getopt)
AC_LIBOBJ(getopt1)
AC_CONFIG_LINKS([lib/getopt.h:lib/gnugetopt.h])])])])