macros/gssapi-check.m4

   1 dnl Autoconf macro to check for kerberos
   2
   3 AC_DEFUN([NETATALK_GSSAPI_CHECK],
   4 [
   5     FOUND_GSSAPI=no
   6     GSSAPI_LIBS=""
   7     GSSAPI_CFLAGS=""
   8     GSSAPI_LDFLAGS=""
   9     save_CFLAGS="$CFLAGS"
  10     save_LDFLAGS="$LDFLAGS"
  11     save_LIBS="$LIBS"
  12     export CFLAGS=""
  13     export LDFLAGS=""
  14     export LIBS=""
  15
  16     AC_ARG_WITH(gssapi,
  17         [  --with-gssapi[[=PATH]]    path to GSSAPI for Kerberos V UAM [[auto]]],
  18         [compilegssapi=$withval],
  19         [compilegssapi=auto]
  20     )
  21
  22     if test x"$compilegssapi" != x"no" ; then
  23         if test "x$compilegssapi" != "xyes" -a "x$compilegssapi" != "xauto" ; then
  24             export CFLAGS="-I$withval/include"
  25             export LDFLAGS="-L$withval/${atalk_libname}"
  26             AC_MSG_NOTICE([checking for GSSAPI support in $compilegssapi])
  27         fi
  28
  29         if test x"$compilegssapi" = x"yes" -o x"$compilegssapi" = x"auto" ; then
  30             # check for krb5-config from recent MIT and Heimdal kerberos 5
  31             AC_PATH_PROG(KRB5_CONFIG, krb5-config)
  32             AC_MSG_CHECKING([for working krb5-config that takes --libs gssapi])
  33
  34             if test -x "$KRB5_CONFIG" ; then
  35                 TEMP="`$KRB5_CONFIG --libs gssapi`"
  36                 if test $? -eq 0 ; then
  37                     GSSAPI_CFLAGS="`$KRB5_CONFIG --cflags | sed s/@INCLUDE_des@//`"
  38                     GSSAPI_LIBS="$TEMP"
  39                     FOUND_GSSAPI=yes
  40                     AC_MSG_RESULT(yes)
  41                 else
  42                     AC_MSG_RESULT(no. Fallback to previous krb5 detection strategy)
  43                 fi
  44             else
  45                 AC_MSG_RESULT(no. Fallback to previous krb5 detection strategy)
  46             fi
  47         fi
  48     fi
  49
  50     if test x"$compilegssapi" != x"no" -a x"$FOUND_GSSAPI" = x"no" ; then
  51         # check for gssapi headers
  52         gss_headers_found=no
  53         AC_CHECK_HEADERS(gssapi.h gssapi/gssapi_generic.h gssapi/gssapi.h gssapi/gssapi_krb5.h,
  54             [gss_headers_found=yes])
  55         if test x"$gss_headers_found" = x"no" ; then
  56             AC_MSG_ERROR([GSSAPI installation not found, headers missing])
  57         fi
  58         # check for libs
  59         AC_SEARCH_LIBS(gss_display_status, [gss gssapi gssapi_krb5])
  60         if test x"$ac_cv_search_gss_display_status" = x"no" ; then
  61             AC_MSG_ERROR([GSSAPI installation not found, library missing])
  62         fi
  63         GSSAPI_CFLAGS="$CFLAGS"
  64         GSSAPI_LIBS="$LIBS"
  65         FOUND_GSSAPI=yes
  66     fi
  67
  68     if test x"$FOUND_GSSAPI" = x"yes" ; then
  69         # check for functions
  70         export CFLAGS="$GSSAPI_CFLAGS"
  71         export LIBS="$GSSAPI_LIBS"
  72         AC_CHECK_FUNC(gss_acquire_cred, [], [AC_MSG_ERROR([GSSAPI: required function gss_acquire_cred missing])])
  73
  74         # Heimdal/MIT compatibility fix
  75         if test "$ac_cv_header_gssapi_h" = "yes" ; then
  76             AC_EGREP_HEADER(
  77                 GSS_C_NT_HOSTBASED_SERVICE,
  78                 gssapi.h,
  79                 AC_DEFINE(HAVE_GSS_C_NT_HOSTBASED_SERVICE, 1, [Wheter GSS_C_NT_HOSTBASED_SERVICE is in gssapi.h])
  80             )
  81         else
  82             AC_EGREP_HEADER(
  83                 GSS_C_NT_HOSTBASED_SERVICE,
  84                 gssapi/gssapi.h,
  85                 AC_DEFINE(HAVE_GSS_C_NT_HOSTBASED_SERVICE, 1, [Wheter GSS_C_NT_HOSTBASED_SERVICE is in gssapi.h])
  86             )
  87         fi
  88
  89         AC_DEFINE(HAVE_GSSAPI, 1, [Whether to enable GSSAPI support])
  90         if test x"$ac_cv_func_gss_acquire_cred" = x"yes" ; then
  91                 ifelse([$1], , :, [$1])
  92         else
  93                 ifelse([$2], , :, [$2])
  94         fi
  95     fi
  96
  97     AC_SUBST(GSSAPI_LIBS)
  98     AC_SUBST(GSSAPI_CFLAGS)
  99     AC_SUBST(GSSAPI_LDFLAGS)
 100
 101     export LIBS="$save_LIBS"
 102     export CFLAGS="$save_CFLAGS"
 103     export LDFLAGS="$save_LDFLAGS"
 104 ])