AC_DEFUN([PHP_LDAP_CHECKS], [
  if test -f $1/include/ldap.h; then
    LDAP_DIR=$1
    LDAP_INCDIR=$1/include
    LDAP_LIBDIR=$1/$PHP_LIBDIR
  elif test -f $1/ldap/public/ldap.h; then
    LDAP_DIR=$1
    LDAP_INCDIR=$1/ldap/public
    LDAP_LIBDIR=$1/$PHP_LIBDIR
  else

    dnl Find Oracle Instant Client RPM header location corresponding to the
    dnl given lib path e.g. for --with-ldap=/usr/lib/oracle/12.1/client64/lib
    AC_CHECK_SIZEOF([long])
    AC_MSG_CHECKING([if we're at 64-bit platform])
    AS_IF([test "$ac_cv_sizeof_long" -eq 4],[
      AC_MSG_RESULT([no])
      PHP_OCI8_IC_LIBDIR_SUFFIX=""
    ],[
      AC_MSG_RESULT([yes])
      PHP_OCI8_IC_LIBDIR_SUFFIX=64
    ])

    OCISDKRPMINC=`echo "$1" | $SED -e 's!^/usr/lib/oracle/\(.*\)/client\('${PHP_OCI8_IC_LIBDIR_SUFFIX}'\)*/lib[/]*$!/usr/include/oracle/\1/client\2!'`

    dnl Check for Oracle Instant Client RPM install
    if test -f $OCISDKRPMINC/ldap.h; then
      LDAP_DIR=$1
      LDAP_INCDIR=$OCISDKRPMINC
      LDAP_LIBDIR=$1
    dnl Check for Oracle Instant Client ZIP install
    elif test -f $1/sdk/include/ldap.h; then
      LDAP_DIR=$1
      LDAP_INCDIR=$1/sdk/include
      LDAP_LIBDIR=$1
    fi
  fi
])

PHP_ARG_WITH([ldap],
  [for LDAP support],
  [AS_HELP_STRING([[--with-ldap[=DIR]]],
    [Include LDAP support])])

PHP_ARG_WITH([ldap-sasl],
  [whether to build with LDAP Cyrus SASL support],
  [AS_HELP_STRING([--with-ldap-sasl],
    [LDAP: Build with Cyrus SASL support])],
  [no],
  [no])

if test "$PHP_LDAP" != "no"; then

  PHP_NEW_EXTENSION(ldap, ldap.c, $ext_shared,, -DZEND_ENABLE_STATIC_TSRMLS_CACHE=1)

  if test "$PHP_LDAP" = "yes"; then
    for i in /usr/local /usr; do
      PHP_LDAP_CHECKS($i)
    done
  else
    PHP_LDAP_CHECKS($PHP_LDAP)
  fi

  if test -z "$LDAP_DIR"; then
    AC_MSG_ERROR(Cannot find ldap.h)
  fi

  dnl -pc removal is a hack for clang
  MACHINE_INCLUDES=$($CC -dumpmachine | $SED 's/-pc//')

  if test -f $LDAP_LIBDIR/liblber.a || test -f $LDAP_LIBDIR/liblber.$SHLIB_SUFFIX_NAME || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/liblber.a || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/liblber.$SHLIB_SUFFIX_NAME; then
    PHP_ADD_LIBRARY_WITH_PATH(lber, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)
    PHP_ADD_LIBRARY_WITH_PATH(ldap, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)

  elif test -f $LDAP_LIBDIR/libldap.$SHLIB_SUFFIX_NAME || test -f $LDAP_LIBDIR/libldap.$SHLIB_SUFFIX_NAME.3 || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/libldap.$SHLIB_SUFFIX_NAME || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/libldap.$SHLIB_SUFFIX_NAME.3 || test -f $LDAP_LIBDIR/libldap.3.dylib; then
    PHP_ADD_LIBRARY_WITH_PATH(ldap, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)

  elif test -f $LDAP_LIBDIR/libclntsh.$SHLIB_SUFFIX_NAME.12.1 || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/libclntsh.$SHLIB_SUFFIX_NAME.12.1; then
    PHP_ADD_LIBRARY_WITH_PATH(clntsh, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)
    AC_DEFINE(HAVE_ORALDAP,1,[ ])

  elif test -f $LDAP_LIBDIR/libclntsh.$SHLIB_SUFFIX_NAME.11.1 || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/libclntsh.$SHLIB_SUFFIX_NAME.11.1; then
    PHP_ADD_LIBRARY_WITH_PATH(clntsh, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)
    AC_DEFINE(HAVE_ORALDAP,1,[ ])

  elif test -f $LDAP_LIBDIR/libclntsh.$SHLIB_SUFFIX_NAME || test -f $LDAP_LIBDIR/$MACHINE_INCLUDES/libclntsh.$SHLIB_SUFFIX_NAME; then
     PHP_ADD_LIBRARY_WITH_PATH(clntsh, $LDAP_LIBDIR, LDAP_SHARED_LIBADD)
     AC_DEFINE(HAVE_ORALDAP,1,[ ])

  else
    AC_MSG_ERROR(Cannot find ldap libraries in $LDAP_LIBDIR.)
  fi

  PHP_ADD_INCLUDE($LDAP_INCDIR)
  PHP_SUBST(LDAP_SHARED_LIBADD)
  AC_DEFINE(HAVE_LDAP,1,[ ])

  dnl Save original values
  _SAVE_CPPFLAGS=$CPPFLAGS
  _SAVE_LIBS=$LIBS
  CPPFLAGS="$CPPFLAGS -I$LDAP_INCDIR"
  LIBS="$LIBS $LDAP_SHARED_LIBADD"

  dnl Check for 3 arg ldap_set_rebind_proc
  AC_CACHE_CHECK([for 3 arg ldap_set_rebind_proc], ac_cv_3arg_setrebindproc,
  [AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <ldap.h>]], [[ldap_set_rebind_proc(0,0,0)]])],
  [ac_cv_3arg_setrebindproc=yes], [ac_cv_3arg_setrebindproc=no])])
  if test "$ac_cv_3arg_setrebindproc" = yes; then
    AC_DEFINE(HAVE_3ARG_SETREBINDPROC,1,[Whether 3 arg set_rebind_proc()])
  fi

  dnl Solaris 2.8 claims to be 2004 API, but doesn't have ldap_parse_reference()
  dnl nor ldap_start_tls_s()
  AC_CHECK_FUNCS([ldap_parse_result ldap_parse_reference ldap_start_tls_s ldap_control_find ldap_parse_extended_result ldap_extended_operation ldap_extended_operation_s ldap_passwd ldap_whoami_s ldap_refresh_s])

  dnl SASL check
  if test "$PHP_LDAP_SASL" != "no"; then
    PKG_CHECK_MODULES([SASL], [libsasl2])

    PHP_EVAL_INCLINE($SASL_CFLAGS)
    PHP_EVAL_LIBLINE($SASL_LIBS, LDAP_SHARED_LIBADD)

    AC_DEFINE(HAVE_LDAP_SASL, 1, [LDAP SASL support])
  fi

  dnl Sanity check
  AC_CHECK_FUNC(ldap_bind_s, [], [
    AC_MSG_ERROR([LDAP build check failed. Please check config.log for more information.])
  ])

  dnl Restore original values
  CPPFLAGS=$_SAVE_CPPFLAGS
  LIBS=$_SAVE_LIBS
fi