m4.include/ax_path_lib_pcre.m4

   1 # ===========================================================================
   2 #     https://www.gnu.org/software/autoconf-archive/ax_path_lib_pcre.html
   3 # ===========================================================================
   4 #
   5 # SYNOPSIS
   6 #
   7 #   AX_PATH_LIB_PCRE [(A/NA)]
   8 #
   9 # DESCRIPTION
  10 #
  11 #   check for pcre lib and set PCRE_LIBS and PCRE_CFLAGS accordingly.
  12 #
  13 #   also provide --with-pcre option that may point to the $prefix of the
  14 #   pcre installation - the macro will check $pcre/include and $pcre/lib to
  15 #   contain the necessary files.
  16 #
  17 #   the usual two ACTION-IF-FOUND / ACTION-IF-NOT-FOUND are supported and
  18 #   they can take advantage of the LIBS/CFLAGS additions.
  19 #
  20 # LICENSE
  21 #
  22 #   Copyright (c) 2008 Guido U. Draheim <guidod@gmx.de>
  23 #
  24 #   Copying and distribution of this file, with or without modification, are
  25 #   permitted in any medium without royalty provided the copyright notice
  26 #   and this notice are preserved.  This file is offered as-is, without any
  27 #   warranty.
  28
  29 #serial 9
  30
  31 AC_DEFUN([AX_PATH_LIB_PCRE],[dnl
  32 AC_MSG_CHECKING([lib pcre])
  33 AC_ARG_WITH(pcre,
  34 [  --with-pcre[[=prefix]]    compile xmlpcre part (via libpcre check)],,
  35      with_pcre="yes")
  36 if test ".$with_pcre" = ".no" ; then
  37   AC_MSG_RESULT([disabled])
  38   m4_ifval($2,$2)
  39 else
  40   AC_MSG_RESULT([(testing)])
  41   AC_CHECK_LIB(pcre, pcre_study)
  42   if test "$ac_cv_lib_pcre_pcre_study" = "yes" ; then
  43      PCRE_LIBS="-lpcre"
  44      AC_MSG_CHECKING([lib pcre])
  45      AC_MSG_RESULT([$PCRE_LIBS])
  46      m4_ifval($1,$1)
  47   else
  48      OLDLDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS -L$with_pcre/lib"
  49      OLDCPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS -I$with_pcre/include"
  50      AC_CHECK_LIB(pcre, pcre_compile)
  51      CPPFLAGS="$OLDCPPFLAGS"
  52      LDFLAGS="$OLDLDFLAGS"
  53      if test "$ac_cv_lib_pcre_pcre_compile" = "yes" ; then
  54         AC_MSG_RESULT(.setting PCRE_LIBS -L$with_pcre/lib -lpcre)
  55         PCRE_LIBS="-L$with_pcre/lib -lpcre"
  56         test -d "$with_pcre/include" && PCRE_CFLAGS="-I$with_pcre/include"
  57         AC_MSG_CHECKING([lib pcre])
  58         AC_MSG_RESULT([$PCRE_LIBS])
  59         m4_ifval($1,$1)
  60      else
  61         AC_MSG_CHECKING([lib pcre])
  62         AC_MSG_RESULT([no, (WARNING)])
  63         m4_ifval($2,$2)
  64      fi
  65   fi
  66 fi
  67 AC_SUBST([PCRE_LIBS])
  68 AC_SUBST([PCRE_CFLAGS])
  69 ])