wmweather+/m4/libpcre.m4

   1 dnl @synopsis CHECK_LIBPCRE([ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
   2 dnl
   3 dnl This macro searches for an installed libpcre library. If nothing
   4 dnl was specified when calling configure, it searches first in /usr/local
   5 dnl and then in /usr. If the --with-libpcre=DIR is specified, it will try
   6 dnl to find it in DIR/include/pcre.h and DIR/lib/libpcre.a. If --without-libpcre
   7 dnl is specified, the library is not searched at all.
   8 dnl
   9 dnl It defines the symbol HAVE_LIBPCRE if the library is found. You should
  10 dnl use autoheader to include a definition for this symbol in a config.h
  11 dnl file.
  12 dnl
  13 dnl Sources files should then use something like
  14 dnl
  15 dnl #ifdef HAVE_LIBPCRE
  16 dnl #include <pcre.h>
  17 dnl #endif /* HAVE_LIBPCRE */
  18 dnl
  19 dnl @version 1.0
  20 dnl based on CHECK_ZLIB by Loic Dachary <loic@senga.org>
  21 dnl
  22
  23 AC_DEFUN([CHECK_LIBPCRE],
  24 #
  25 # Handle user hints
  26 #
  27          [AC_MSG_CHECKING(if libpcre is wanted)
  28          AC_ARG_WITH(libpcre,
  29                      [  --with-libpcre=DIR  root directory path of libpcre installation [defaults to
  30                           /usr/local or /usr if not found in /usr/local]
  31   --without-libpcre   to disable libpcre usage completely],
  32                      [if test "$withval" != no ; then
  33                           LIBPCRE_HOME="$withval"
  34                           AC_MSG_RESULT([yes: libraries ${LIBPCRE_HOME}/lib  includes ${LIBPCRE_HOME}/include])
  35                       else
  36                           AC_MSG_RESULT(no)
  37                       fi],
  38                      [LIBPCRE_HOME=/usr/local
  39                       if test ! -f "${LIBPCRE_HOME}/include/pcre.h"
  40                       then
  41                          LIBPCRE_HOME=/usr
  42                       fi
  43                       AC_MSG_RESULT([yes: libraries ${LIBPCRE_HOME}/lib  includes ${LIBPCRE_HOME}/include])
  44                      ])
  45
  46 #
  47 # Locate libpcre, if wanted
  48 #
  49          if test -n "${LIBPCRE_HOME}"
  50          then
  51              LDFLAGS="$LDFLAGS -L${LIBPCRE_HOME}/lib"
  52              CPPFLAGS="$CPPFLAGS -I${LIBPCRE_HOME}/include"
  53              AC_CHECK_LIB(pcre, pcre_compile, $1, $2)
  54          else
  55              $2
  56          fi
  57     ])