dnl Check for PCRE Libraries

dnl CHECK_PCRE(ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND])

dnl Sets:

dnl  PCRE_CFLAGS

dnl  PCRE_LIBS

PCRE_CONFIG=""

PCRE_VERSION=""

PCRE_CPPFLAGS=""

PCRE_CFLAGS=""

PCRE_LDFLAGS=""

PCRE_LDADD=""

PCRE_LD_PATH=""

AC_DEFUN([CHECK_PCRE],

[dnl

AC_ARG_WITH(

    pcre,

    [AC_HELP_STRING([--with-pcre=PATH],[Path to pcre prefix or config script])],

    [test_paths="${with_pcre}"],

    [test_paths="/usr/local/libpcre /usr/local/pcre /usr/local /opt/libpcre /opt/pcre /opt /usr"])

AC_MSG_CHECKING([for libpcre config script])

dnl # Determine pcre lib directory

if test -z "${with_pcre}"; then

    test_paths="/usr/local/pcre /usr/local /usr"

else

    test_paths="${with_pcre}"

fi

for x in ${test_paths}; do

    dnl # Determine if the script was specified and use it directly

    if test ! -d "$x" -a -e "$x"; then

        PCRE_CONFIG=$x

        pcre_path="no"

        break

    fi

    dnl # Try known config script names/locations

    for PCRE_CONFIG in pcre-config; do

        if test -e "${x}/bin/${PCRE_CONFIG}"; then

            pcre_path="${x}/bin"

            break

        elif test -e "${x}/${PCRE_CONFIG}"; then

            pcre_path="${x}"

            break

        else

            pcre_path=""

        fi

    done

    if test -n "$pcre_path"; then

        break

    fi

done

if test -n "${pcre_path}"; then

    if test "${pcre_path}" != "no"; then

        PCRE_CONFIG="${pcre_path}/${PCRE_CONFIG}"

    fi

    AC_MSG_RESULT([${PCRE_CONFIG}])

    PCRE_VERSION="`${PCRE_CONFIG} --version`"

    if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre VERSION: $PCRE_VERSION); fi

    PCRE_CFLAGS="`${PCRE_CONFIG} --cflags`"

    if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre CFLAGS: $PCRE_CFLAGS); fi

    PCRE_LDADD="`${PCRE_CONFIG} --libs`"

    if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre LDADD: $PCRE_LDADD); fi

    PCRE_LD_PATH="/`${PCRE_CONFIG} --libs | cut -d'/' -f2,3,4,5,6 | cut -d ' ' -f1`"

    if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(pcre PCRE_LD_PATH: $PCRE_LD_PATH); fi

else

    AC_MSG_RESULT([no])

fi

AC_SUBST(PCRE_CONFIG)

AC_SUBST(PCRE_VERSION)

AC_SUBST(PCRE_CPPFLAGS)

AC_SUBST(PCRE_CFLAGS)

AC_SUBST(PCRE_LDFLAGS)

AC_SUBST(PCRE_LDADD)

AC_SUBST(PCRE_LD_PATH)

if test -z "${PCRE_VERSION}"; then

    AC_MSG_NOTICE([*** pcre library not found.])

    ifelse([$2], , AC_MSG_ERROR([pcre library is required]), $2)

else

    AC_MSG_NOTICE([using pcre v${PCRE_VERSION}])

    ifelse([$1], , , $1) 

fi 

])