dnl @synopsis AX_PATH_LIB_PCRE [(A/NA)]
dnl
dnl check for pcre lib and set PCRE_LIBS and PCRE_CFLAGS accordingly.
dnl
dnl also provide --with-pcre option that may point to the $prefix of
dnl the pcre installation - the macro will check $pcre/include and
dnl $pcre/lib to contain the necessary files.
dnl
dnl the usual two ACTION-IF-FOUND / ACTION-IF-NOT-FOUND are supported
dnl and they can take advantage of the LIBS/CFLAGS additions.
dnl
dnl @category InstalledPackages
dnl @author Guido U. Draheim <guidod@gmx.de>
dnl @version 2006-10-13
dnl @license GPLWithACException

AC_DEFUN([AX_PATH_LIB_PCRE],[dnl
AC_MSG_CHECKING([lib pcre])
AC_ARG_WITH(pcre,
[  --with-pcre[[=prefix]]    compile xmlpcre part (via libpcre check)],,
     with_pcre="yes")
if test ".$with_pcre" = ".no" ; then
  AC_MSG_RESULT([disabled])
  m4_ifval($2,$2)
else
  AC_MSG_RESULT([(testing)])
  AC_CHECK_LIB(pcre, pcre_study)
  if test "$ac_cv_lib_pcre_pcre_study" = "yes" ; then
     PCRE_LIBS="-lpcre"
     AC_MSG_CHECKING([lib pcre])
     AC_MSG_RESULT([$PCRE_LIBS])
     m4_ifval($1,$1)
  else
     OLDLDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS -L$with_pcre/lib"
     OLDCPPFLAGS="$CPPFLAGS" ; CPPFLAGS="$CPPFLAGS -I$with_pcre/include"
     AC_CHECK_LIB(pcre, pcre_compile)
     CPPFLAGS="$OLDCPPFLAGS"
     LDFLAGS="$OLDLDFLAGS"
     if test "$ac_cv_lib_pcre_pcre_compile" = "yes" ; then
        AC_MSG_RESULT(.setting PCRE_LIBS -L$with_pcre/lib -lpcre)
        PCRE_LIBS="-L$with_pcre/lib -lpcre"
        test -d "$with_pcre/include" && PCRE_CFLAGS="-I$with_pcre/include"
        AC_MSG_CHECKING([lib pcre])
        AC_MSG_RESULT([$PCRE_LIBS])
        m4_ifval($1,$1)
     else
        AC_MSG_CHECKING([lib pcre])
        AC_MSG_RESULT([no, (WARNING)])
        m4_ifval($2,$2)
     fi
  fi
fi
AC_SUBST([PCRE_LIBS])
AC_SUBST([PCRE_CFLAGS])
])