acinclude.m4

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dnl Copyright (c) 2019, Jisc
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AC_DEFUN([AX_CHECK_KRB5],
[AC_MSG_CHECKING(for GSS-API and Kerberos implementation)
KRB5_DIR=
found_krb5="no"
AC_ARG_WITH(krb5,
    AC_HELP_STRING([--with-krb5],
       [Use krb5 (in specified installation directory)]),
    [check_krb5_dir="$withval"],
    [check_krb5_dir=])
for dir in $check_krb5_dir $prefix /usr/local /usr ; do
   krb5dir="$dir"
   if test -x "$dir/bin/krb5-config"; then
     found_krb5="yes";
     if test "x$target_windows" = "xyes"; then
        KRB5_CFLAGS=-I"$check_krb5_dir/include";
        KRB5_LDFLAGS="-L$check_krb5_dir/lib/";
        KRB5_LIBS="-lkrb5_32 -lgssapi32";
        COMPILE_ET="$check_krb5_dir/bin/compile_et";
	AC_MSG_RESULT([yes])
     else
        KRB5_CFLAGS=`$dir/bin/krb5-config gssapi --cflags`;
        KRB5_LDFLAGS="-L$dir/lib";
        KRB5_LIBS=`$dir/bin/krb5-config gssapi --libs`
AC_MSG_RESULT([yes])
        AC_PATH_PROG(COMPILE_ET, [compile_et], [compile_et], [$dir/bin$PATH_SEPARATOr])
     fi
     break;
   fi
done
if test x_$found_krb5 != x_yes; then
   AC_MSG_RESULT($found_krb5)
   AC_MSG_ERROR([
----------------------------------------------------------------------
  Cannot find GSS-API/Kerberos libraries.

  Please install MIT Kerberos or specify installation directory with
  --with-krb5=(dir).
----------------------------------------------------------------------
])
else
	printf "Kerberos found in $krb5dir\n";
	AC_SUBST(COMPILE_ET)
	AC_CHECK_LIB(krb5, krb5_externalize_opaque, [AC_DEFINE_UNQUOTED([HAVE_KRB5_EXTERNALIZE_OPAQUE], 1, [Define if krb5 library uses old serialization API])], [], "$KRB5_LIBS")
	AC_CHECK_LIB(gssapi_krb5, gss_inquire_attrs_for_mech, [AC_DEFINE_UNQUOTED([HAVE_GSS_INQUIRE_ATTRS_FOR_MECH], 1, [Define if GSS-API library supports RFC 5587])], [], "$KRB5_LIBS")
	AC_CHECK_LIB(gssapi_krb5, GSS_C_INQ_NEGOEX_KEY, [AC_DEFINE_UNQUOTED([HAVE_GSS_C_INQ_NEGOEX_KEY], 1, [Define if GSS-API library supports NegoEx])], [], "$KRB5_LIBS")
	AC_CHECK_LIB(gssapi_krb5, GSS_C_MA_NEGOEX_AND_SPNEGO, [AC_DEFINE_UNQUOTED([HAVE_GSS_C_MA_NEGOEX_AND_SPNEGO], 1, [Define if GSS-API library supports exposing mechanism through both NegoEx and SPNEGO]) negoex=yes], [negoex=no], "$KRB5_LIBS")
	AM_CONDITIONAL(NEGOEX, test "x$negoex" != "xno")
	AC_CHECK_TYPE(gss_const_name_t, [AC_DEFINE([MECHSANON_GSS_CONST_NAME_T_IS_POINTER], 1, [Define if gss_const_name_t is a pointer. Broken krb5 10.x headers define it as a struct.])], [], [[#include <gssapi/gssapi.h>]])
	AC_SUBST(KRB5_CFLAGS)
	AC_SUBST(KRB5_LDFLAGS)
	AC_SUBST(KRB5_LIBS)
fi
])dnl