m4.include/ax_path_lib_pcre.m4

   1 dnl @synopsis AX_PATH_LIB_PCRE [(A/NA)]
   2 dnl
   3 dnl check for pcre lib and set PCRE_LIBS and PCRE_CFLAGS accordingly.
   4 dnl
   5 dnl also provide --with-pcre option that may point to the $prefix of
   6 dnl the pcre installation - the macro will check $pcre/include and
   7 dnl $pcre/lib to contain the necessary files.
   8 dnl
   9 dnl the usual two ACTION-IF-FOUND / ACTION-IF-NOT-FOUND are supported
  10 dnl and they can take advantage of the LIBS/CFLAGS additions.
  11 dnl
  12 dnl @author Guido U. Draheim <guidod@gmx.de>
  13 dnl @author Slava Zanko <slavazanko@gmail.com>
  14 dnl @version 2009-07-06
  15 dnl @license GPLWithACException
  16
  17 AC_DEFUN([AX_PATH_LIB_PCRE],[dnl
  18 AC_MSG_CHECKING([lib pcre])
  19 AC_ARG_WITH([pcre],
  20             AS_HELP_STRING([--with-pcre@<:@=prefix@:>@], [Compile pcre part (via libpcre check)]),
  21             ,
  22             [with_pcre="yes"]
  23 )
  24 if test x"$with_pcre" = "xno" ; then
  25   AC_MSG_RESULT([disabled])
  26   m4_ifval($2,$2)
  27 else
  28
  29   AC_MSG_RESULT([(testing)])
  30
  31   if test "x$with_pcre" = "xyes" ; then
  32     PCRE_CFLAGS="`pcre-config --cflags`"
  33     PCRE_LIBS="`pcre-config --libs`"
  34   else
  35     test_PCRE_LIBS="-L$with_pcre/lib"
  36     test_PCRE_CFLAGS="-I$with_pcre/include"
  37
  38      OLDLDFLAGS="$LDFLAGS" ; LDFLAGS="$LDFLAGS $test_PCRE_LIBS"
  39      OLDCFLAGS="$CFLAGS" ; CFLAGS="$CFLAGS $test_PCRE_CFLAGS"
  40
  41      AC_CHECK_LIB(pcre, pcre_compile)
  42
  43      if test x"$ac_cv_lib_pcre_pcre_compile" = x"yes" ; then
  44         AC_MSG_RESULT(setting PCRE_LIBS -L$with_pcre/lib -lpcre)
  45
  46         PCRE_LIBS=$test_PCRE_LIBS
  47         test_PCRE_CFLAGS=$test_PCRE_CFLAGS
  48
  49         AC_MSG_CHECKING([lib pcre])
  50         AC_MSG_RESULT([$PCRE_LIBS])
  51         m4_ifval($1,$1)
  52      else
  53         AC_MSG_CHECKING([lib pcre])
  54         AC_MSG_RESULT([no, (WARNING)])
  55         m4_ifval($2,$2)
  56      fi
  57
  58      CFLAGS="$OLDCFLAGS"
  59      LDFLAGS="$OLDLDFLAGS"
  60
  61   fi
  62 fi
  63
  64 AC_SUBST([PCRE_LIBS])
  65 AC_SUBST([PCRE_CFLAGS])
  66
  67 ])