apache2/build/find_pcre.m4

   1 dnl Check for PCRE Libraries
   2 dnl CHECK_PCRE(ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])
   3 dnl Sets:
   4 dnl  PCRE_CFLAGS
   5 dnl  PCRE_LIBS
   6
   7 PCRE_CONFIG=""
   8 PCRE_CFLAGS=""
   9 PCRE_LIBS=""
  10
  11 AC_DEFUN([CHECK_PCRE],
  12 [dnl
  13
  14 AC_ARG_WITH(
  15     pcre,
  16     [AC_HELP_STRING([--with-pcre=PATH],[Path to pcre prefix or config script])],
  17     [test_paths="${with_pcre}"],
  18     [test_paths="/usr/local/libpcre /usr/local/pcre /usr/local /opt/libpcre /opt/pcre /opt /usr"])
  19
  20 AC_MSG_CHECKING([for libpcre config script])
  21
  22 dnl # Determine pcre lib directory
  23 if test -z "${with_pcre}"; then
  24     test_paths="/usr/local/pcre /usr/local /usr"
  25 else
  26     test_paths="${with_pcre}"
  27 fi
  28
  29 for x in ${test_paths}; do
  30     dnl # Determine if the script was specified and use it directly
  31     if test ! -d "$x" -a -e "$x"; then
  32         PCRE_CONFIG=$x
  33         pcre_path="no"
  34         break
  35     fi
  36
  37     dnl # Try known config script names/locations
  38     for PCRE_CONFIG in pcre-config; do
  39         if test -e "${x}/bin/${PCRE_CONFIG}"; then
  40             pcre_path="${x}/bin"
  41             break
  42         elif test -e "${x}/${PCRE_CONFIG}"; then
  43             pcre_path="${x}"
  44             break
  45         else
  46             pcre_path=""
  47         fi
  48     done
  49     if test -n "$pcre_path"; then
  50         break
  51     fi
  52 done
  53     CFLAGS=$save_CFLAGS
  54     LDFLAGS=$save_LDFLAGS
  55
  56 if test -n "${pcre_path}"; then
  57     if test "${pcre_path}" != "no"; then
  58         PCRE_CONFIG="${pcre_path}/${PCRE_CONFIG}"
  59     fi
  60     AC_MSG_RESULT([${PCRE_CONFIG}])
  61     PCRE_CFLAGS="`${PCRE_CONFIG} --cflags`"
  62     if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre CFLAGS: $PCRE_CFLAGS); fi
  63     PCRE_LIBS="`${PCRE_CONFIG} --libs`"
  64     if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre LIBS: $PCRE_LIBS); fi
  65     CFLAGS=$save_CFLAGS
  66     LDFLAGS=$save_LDFLAGS
  67 else
  68     AC_MSG_RESULT([no])
  69 fi
  70
  71 AC_SUBST(PCRE_LIBS)
  72 AC_SUBST(PCRE_CFLAGS)
  73
  74 if test -z "${PCRE_LIBS}"; then
  75     AC_MSG_NOTICE([*** pcre library not found.])
  76     ifelse([$2], , AC_MSG_ERROR([pcre library is required]), $2)
  77 else
  78     AC_MSG_NOTICE([using '${PCRE_LIBS}' for pcre Library])
  79     ifelse([$1], , , $1)
  80 fi
  81 ])