The build system now probes for GSS-API, Kerberos v5 and v4, and AFS

libraries as necessary rather than hard-coding libraries.  Building
on systems without strong shared library dependencies and building
against static libraries should now work.

Building kasetkey (for AFS kaserver synchronization) is now optional
and not enabled by default.  Pass --with-afs to enable it.  This
allows wallet to be easily built in an environment without AFS.

1 files changed, 143 insertions, 0 deletions

diff --git a/m4/krb4.m4 b/m4/krb4.m4
new file mode 100644
index 0000000..997a3a4
--- /dev/null
+++ b/m4/krb4.m4
@@ -0,0 +1,143 @@
+dnl krb4.m4 -- Find the compiler and linker flags for Kerberos v4.
+dnl $Id$
+dnl
+dnl Finds the compiler and linker flags for linking with Kerberos v4 libraries
+dnl and sets the substitution variables KRB4_CPPFLAGS, KRB4_LDFLAGS, and
+dnl KRB4_LIBS.  Provides the --with-krb4 configure option to specify a
+dnl non-standard path to the Kerberos libraries.  Uses krb5-config where
+dnl available unless reduced dependencies is requested.
+dnl
+dnl Provides the macro RRA_LIB_KRB4 and sets the substitution variables
+dnl KRB4_CPPFLAGS, KRB4_LDFLAGS, and KRB4_LIBS.  Also provides
+dnl RRA_LIB_KRB4_SET to set CPPFLAGS, LDFLAGS, and LIBS to include the
+dnl Kerberos libraries; RRA_LIB_KRB4_SWITCH to do the same but save the
+dnl current values first; and RRA_LIB_KRB4_RESTORE to restore those settings
+dnl to before the last RRA_LIB_KRB4_SWITCH.
+dnl
+dnl Written by Russ Allbery <rra@stanford.edu>
+dnl Copyright 2005, 2006, 2007, 2008
+dnl     Board of Trustees, Leland Stanford Jr. University
+dnl See LICENSE for licensing terms.
+
+dnl Set CPPFLAGS, LDFLAGS, and LIBS to values including the Kerberos v4
+dnl settings.
+AC_DEFUN([RRA_LIB_KRB4_SET],
+[CPPFLAGS="$KRB4_CPPFLAGS $CPPFLAGS"
+ LDFLAGS="$KRB4_LDFLAGS $LDFLAGS"
+ LIBS="$KRB4_LIBS $LIBS"])
+
+dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
+dnl versions that include the Kerberos v4 flags.  Used as a wrapper, with
+dnl RRA_LIB_KRB4_RESTORE, around tests.
+AC_DEFUN([RRA_LIB_KRB4_SWITCH],
+[rra_krb4_save_CPPFLAGS="$CPPFLAGS"
+ rra_krb4_save_LDFLAGS="$LDFLAGS"
+ rra_krb4_save_LIBS="$LIBS"
+ RRA_LIB_KRB4_SET])
+
+dnl Restore CPPFLAGS, LDFLAGS, and LIBS to their previous values (before
+dnl RRA_LIB_KRB4_SWITCH was called).
+AC_DEFUN([RRA_LIB_KRB4_RESTORE],
+[CPPFLAGS="$rra_krb4_save_CPPFLAGS"
+ LDFLAGS="$rra_krb4_save_LDFLAGS"
+ LIBS="$rra_krb4_save_LIBS"])
+
+dnl Set KRB4_CPPFLAGS and KRB4_LDFLAGS based on rra_krb4_root.
+AC_DEFUN([_RRA_LIB_KRB4_PATHS],
+[AS_IF([test x"$rra_krb4_root" != x],
+    [AS_IF([test x"$rra_krb4_root" != x/usr],
+        [KRB4_CPPFLAGS="-I${rra_krb4_root}/include"])
+     KRB4_LDFLAGS="-L${rra_krb4_root}/lib"])])
+
+dnl Does the appropriate library checks for reduced-dependency Kerberos v4
+dnl linkage.
+AC_DEFUN([_RRA_LIB_KRB4_REDUCED],
+[RRA_LIB_KRB4_SWITCH
+ AC_CHECK_LIB([krb4], [krb_get_svc_in_tkt], [KRB4_LIBS="-lkrb4"],
+    [AC_CHECK_LIB([krb], [krb_get_svc_in_tkt], [KRB4_LIBS="-lkrb"],
+        [AC_MSG_ERROR([cannot find usable Kerberos v4 library])])])
+ RRA_LIB_KRB4_RESTORE])
+
+dnl Does the appropriate library checks for Kerberos v4 linkage when we don't
+dnl have krb5-config or reduced dependencies.
+AC_DEFUN([_RRA_LIB_KRB4_MANUAL],
+[RRA_LIB_KRB4_SWITCH
+ rra_krb4_extra=
+ LIBS=
+ AC_SEARCH_LIBS([res_search], [resolv], ,
+    [AC_SEARCH_LIBS([__res_search], [resolv])])
+ AC_SEARCH_LIBS([gethostbyname], [nsl])
+ AC_SEARCH_LIBS([socket], [socket], ,
+    [AC_CHECK_LIB([nsl], [socket], [LIBS="-lnsl -lsocket $LIBS"], ,
+        [-lsocket])])
+ AC_SEARCH_LIBS([crypt], [crypt])
+ rra_krb4_extra="$LIBS"
+ LIBS="$rra_krb4_save_LIBS"
+ AC_CHECK_LIB([crypto], [des_set_key],
+    [rra_krb4_extra="-lcrypto $rra_krb4_extra"],
+    [AC_CHECK_LIB([des], [des_set_key],
+        [rra_krb4_extra="-ldes $rra_krb4_extra"])])
+ AC_CHECK_LIB([krb], [krb_get_svc_in_tkt],
+    [KRB4_LIBS="-lkrb $rra_krb4_extra"],
+    [rra_krb4_extra="-ldes425 -lkrb5 -lk5crypto -lcom_err $rra_krb4_extra"
+     AC_CHECK_LIB([krb5support], [krb5int_getspecific],
+        [rra_krb4_extra="$rra_krb4_extra -lkrb5support"],
+        [AC_CHECK_LIB([pthreads], [pthread_setspecific],
+            [rra_krb4_pthread="-lpthreads"],
+            [AC_CHECK_LIB([pthread], [pthread_setspecific],
+                [rra_krb4_pthread="-lpthread"])])
+         AC_CHECK_LIB([krb5support], [krb5int_setspecific],
+            [rra_krb4_extra="-lkrb5support $rra_krb4_pthread"],
+            [$rra_krb4_pthread])])
+     AC_CHECK_LIB([krb4], [krb_get_svc_in_tkt],
+        [KRB4_LIBS="-lkrb4 $rra_krb4_extra"],
+        [AC_MSG_ERROR([cannot find usable Kerberos v4 library])],
+        [$rra_krb4_extra])],
+    [$rra_krb4_extra])
+ RRA_LIB_KRB4_RESTORE])
+
+dnl Additional checks for portability that apply to either way that we find
+dnl the right libraries.
+AC_DEFUN([_RRA_LIB_KRB4_EXTRA],
+[RRA_LIB_KRB4_SWITCH
+ AC_CHECK_HEADERS([kerberosIV/krb.h])
+ RRA_LIB_KRB4_RESTORE])
+
+dnl The main macro.
+AC_DEFUN([RRA_LIB_KRB4],
+[AC_REQUIRE([RRA_ENABLE_REDUCED_DEPENDS])
+rra_krb4_root=
+KRB4_CPPFLAGS=
+KRB4_LDFLAGS=
+KRB4_LIBS=
+AC_SUBST([KRB4_CPPFLAGS])
+AC_SUBST([KRB4_LDFLAGS])
+AC_SUBST([KRB4_LIBS])
+AC_ARG_WITH([krb4],
+    [AC_HELP_STRING([--with-krb4=DIR],
+        [Location of Kerberos v4 headers and libraries])],
+    [AS_IF([test x"$withval" != xyes && test x"$withval" != xno],
+        [rra_krb4_root="$withval"])])
+AS_IF([test x"$rra_reduced_depends" = xtrue],
+    [_RRA_LIB_KRB4_PATHS
+     _RRA_LIB_KRB4_REDUCED],
+    [AC_ARG_VAR([KRB5_CONFIG], [Path to krb5-config])
+     AS_IF([test x"$rra_krb4_root" != x],
+         [AS_IF([test -x "${rra_krb4_root}/bin/krb5-config"],
+             [KRB5_CONFIG="${rra_krb4_root}/bin/krb5-config"])],
+         [AC_PATH_PROG([KRB5_CONFIG], [krb5-config])])
+     AS_IF([test x"$KRB5_CONFIG" != x],
+         [AC_CACHE_CHECK([for krb4 support in krb5-config],
+             [rra_cv_lib_krb4_config],
+             [AS_IF(["$KRB5_CONFIG" | grep krb4 > /dev/null 2>&1],
+                 [rra_cv_lib_krb4_config=yes],
+                 [rra_cv_lib_krb4_config=no])])
+          AS_IF([test "$rra_cv_lib_krb4_config" = yes],
+              [KRB4_CPPFLAGS=`"$KRB5_CONFIG" --cflags krb4`
+               KRB4_LIBS=`"$KRB5_CONFIG" --libs krb4`],
+              [_RRA_LIB_KRB4_PATHS
+               _RRA_LIB_KRB4_MANUAL])
+          KRB4_CPPFLAGS=`echo "$KRB5_CPPFLAGS" | sed 's%-I/usr/include ?%%'`],
+         [_RRA_LIB_KRB4_PATHS
+          _RRA_LIB_KRB4_MANUAL])])
+ _RRA_LIB_KRB4_EXTRA])