dnl Check for YAJL Libraries

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

dnl Sets:

dnl  YAJL_CFLAGS

dnl  YAJL_LDADD

dnl  YAJL_LDFLAGS

dnl  YAJL_LIBS

AC_DEFUN([CHECK_YAJL],

[dnl

AC_REQUIRE([PKG_PROG_PKG_CONFIG])

YAJL_CONFIG=""

YAJL_VERSION=""

YAJL_CFLAGS=""

YAJL_CPPFLAGS=""

YAJL_LDADD=""

YAJL_LDFLAGS=""

YAJL_CONFIG=${PKG_CONFIG}

YAJL_PKGNAMES="yajl2 yajl"

YAJL_SONAMES="so la sl dll dylib"

AC_ARG_WITH(

    yajl,

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

    ,, with_yajl=yes)

AS_CASE(["${with_yajl}"],

  [no], [test_paths=],

  [yes], [test_paths="/usr/local/libyajl /usr/local/yajl /usr/local /opt/libyajl /opt/yajl /opt /usr"],

  [test_paths="${with_yajl}"])

AS_IF([test "x${test_paths}" != "x"], [

AC_MSG_CHECKING([for libyajl config script])

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

        YAJL_CONFIG=$x

        break

    fi

    dnl # Try known config script names/locations

    for y in $YAJL_CONFIG; do

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

            YAJL_CONFIG="${x}/bin/${y}"

            yajl_config="${YAJL_CONFIG}"

            break

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

            YAJL_CONFIG="${x}/${y}"

            yajl_config="${YAJL_CONFIG}"

            break

        fi

    done

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

        break

    fi

done

dnl # Try known package names

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

    YAJL_PKGNAME=""

    for x in ${YAJL_PKGNAMES}; do

        if ${YAJL_CONFIG} --exists ${x}; then

            YAJL_PKGNAME="$x"

            break

        fi

    done

fi

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

    AC_MSG_RESULT([${YAJL_CONFIG}])

    YAJL_VERSION="`${YAJL_CONFIG} ${YAJL_PKGNAME} --modversion`"

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

    YAJL_CFLAGS="`${YAJL_CONFIG} ${YAJL_PKGNAME} --cflags`"

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

    YAJL_LDADD="`${YAJL_CONFIG} ${YAJL_PKGNAME} --libs-only-l`"

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

    YAJL_LDFLAGS="`${YAJL_CONFIG} ${YAJL_PKGNAME} --libs-only-L --libs-only-other`"

    if test "$verbose_output" -eq 1; then AC_MSG_NOTICE(yajl LDFLAGS: $YAJL_LDFLAGS); fi

else

    AC_MSG_RESULT([no])

    dnl Hack to just try to find the lib and include

    AC_MSG_CHECKING([for yajl install])

    for x in ${test_paths}; do

        for y in ${YAJL_SONAMES}; do

           if test -e "${x}/libyajl.${y}"; then

                yajl_lib_path="${x}/"

                yajl_lib_name="yajl"

                break

            else

                yajl_lib_path=""

                yajl_lib_name=""

            fi

        done

        if test -n "$yajl_lib_path"; then

            break

        fi

    done

    for x in ${test_paths}; do

        if test -e "${x}/include/yajl_parse.h"; then

            yajl_inc_path="${x}/include"

            break

        elif test -e "${x}/yajl_parse.h"; then

            yajl_inc_path="${x}"

            break

        fi

        dnl # Check some sub-paths as well

        for yajl_pkg_name in ${yajl_lib_name} ${YAJL_PKGNAMES}; do

            if test -e "${x}/include/${yajl_pkg_name}/yajl_parse.h"; then

                yajl_inc_path="${x}/include"

                break

            elif test -e "${x}/${yajl_pkg_name}/yajl_parse.h"; then

                yajl_inc_path="${x}"

                break

            else

                yajl_inc_path=""

            fi

        done

        if test -n "$yajl_inc_path"; then

            break

        fi

    done

    if test -n "${yajl_lib_path}" -a -n "${yajl_inc_path}"; then

        YAJL_CONFIG=""

        AC_MSG_RESULT([${yajl_lib_path} ${yajl_inc_path}])

        YAJL_VERSION="2"

        YAJL_CFLAGS="-I${yajl_inc_path}"

        YAJL_LDADD="-l${yajl_lib_name}"

        YAJL_LDFLAGS="-L${yajl_lib_path}"

    else

        YAJL_VERSION=""

        AC_MSG_RESULT([no])

    fi

fi

])

YAJL_LIBS=${YAJL_LDADD}

AC_SUBST(YAJL_CFLAGS)

AC_SUBST(YAJL_LDADD)

AC_SUBST(YAJL_LIBS)

AC_SUBST(YAJL_LDFLAGS)

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

      ifelse([$2], , AC_MSG_NOTICE([optional yajl library not found]), $2)

    else

      AC_MSG_NOTICE([using yajl v${YAJL_VERSION}])

      YAJL_CFLAGS="-DWITH_YAJL ${YAJL_CFLAGS}"

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

    fi 

])