m4/regex.m4

   1 #serial 3
   2
   3 dnl Derived from code in GNU grep.
   4
   5 AC_DEFUN(jm_WITH_REGEX,
   6   [
   7     AC_REQUIRE([AM_GLIBC])
   8
   9     dnl Even packages that don't use regex.c can use this macro.
  10     dnl Of course, for them it doesn't do anything.
  11
  12     syscmd([test -f lib/regex.c])
  13     ifelse(sysval, 0,
  14       [
  15         # By default, don't use the included regex.c on systems with glibc 2
  16         test "$ac_cv_glibc" = yes && default=no || default=yes
  17
  18         AC_ARG_WITH(included-regex,
  19         [  --without-included-regex don't compile regex; this is the default on
  20                           systems with version 2 of the GNU C library
  21                           (use with caution on other system)],
  22                     jm_with_regex=$withval,
  23                     jm_with_regex=$default)
  24         if test "$jm_with_regex" = yes; then
  25           LIBOBJS="$LIBOBJS regex.o"
  26         fi
  27       ],
  28     )
  29   ]
  30 )