1 files changed, 94 insertions, 0 deletions
diff --git a/m4/afs.m4 b/m4/afs.m4
new file mode 100644
index 0000000..66a3f08
--- /dev/null
+++ b/m4/afs.m4
@@ -0,0 +1,94 @@
+dnl afs.m4 -- Find the compiler and linker flags for OpenAFS.
+dnl $Id$
+dnl
+dnl If --with-afs is given, finds the compiler and linker flags for building
+dnl with OpenAFS libraries; sets AFS_CPPFLAGS, AFS_LDFLAGS, and AFS_LIBS as
+dnl appropriate; and defines HAVE_AFS.  Provides the macro RRA_LIB_AFS, which
+dnl takes no arguments.
+dnl
+dnl This function also sets rra_afs to true if AFS was requested, which can be
+dnl checked to determine if further checks should be done.
+dnl
+dnl Also provides RRA_LIB_AFS_SET to set CPPFLAGS, LDFLAGS, and LIBS to
+dnl include the AFS libraries; RRA_LIB_AFS_SWITCH to do the same but save the
+dnl current values first; and RRA_LIB_AFS_RESTORE to restore those settings to
+dnl before the last RRA_LIB_AFS_SWITCH.
+dnl
+dnl Written by Russ Allbery <rra@stanford.edu>
+dnl Based on code developed by Derrick Brashear and Ken Hornstein of Sine
+dnl Nomine Associates, on behalf of Stanford University.
+dnl Copyright 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 AFS settings.
+AC_DEFUN([RRA_LIB_AFS_SET],
+[CPPFLAGS="$AFS_CPPFLAGS $CPPFLAGS"
+ LDFLAGS="$AFS_LDFLAGS $LDFLAGS"
+ LIBS="$AFS_LIBS $LIBS"])
+
+dnl Save the current CPPFLAGS, LDFLAGS, and LIBS settings and switch to
+dnl versions that include the AFS flags.  Used as a wrapper, with
+dnl RRA_LIB_AFS_RESTORE, around tests.
+AC_DEFUN([RRA_LIB_AFS_SWITCH],
+[rra_afs_save_CPPFLAGS="$CPPFLAGS"
+ rra_afs_save_LDFLAGS="$LDFLAGS"
+ rra_afs_save_LIBS="$LIBS"
+ RRA_LIB_AFS_SET])
+
+dnl Restore CPPFLAGS, LDFLAGS, and LIBS to their previous values (before
+dnl RRA_LIB_AFS_SWITCH was called).
+AC_DEFUN([RRA_LIB_AFS_RESTORE],
+[CPPFLAGS="$rra_afs_save_CPPFLAGS"
+ LDFLAGS="$rra_afs_save_LDFLAGS"
+ LIBS="$rra_afs_save_LIBS"])
+
+dnl The function that does the work checking for the AFS libraries.
+AC_DEFUN([_RRA_LIB_AFS_CHECK],
+[RRA_LIB_AFS_SET
+ LIBS=
+ AC_SEARCH_LIBS([pthread_getspecific], [pthread])
+ 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 $LIBS"], ,
+        [-lsocket])])
+ AFS_LIBS="$AFS_LIBS $LIBS"
+ LIBS="$AFS_LIBS"
+ AC_CACHE_CHECK([whether linking with AFS libraries work], [rra_cv_lib_afs],
+ [AC_TRY_LINK(
+[#include <afs/param.h>
+#include <afs/kautils.h>],
+[char cell[256] = "EXAMPLE.COM";
+char realm[256];
+int local;
+
+ka_CellToRealm(cell, realm, &local);],
+      [rra_cv_lib_afs=yes],
+      [rra_cv_lib_afs=no])])
+ AS_IF([test "$rra_cv_lib_afs" = no],
+    [AC_MSG_ERROR([unable to link test AFS program])])
+ RRA_LIB_AFS_RESTORE])
+
+dnl The public entry point.  Sets up the --with option and only does the
+dnl library check if AFS linkage was requested.
+AC_DEFUN([RRA_LIB_AFS],
+[rra_afs=false
+ AFS_CPPFLAGS=
+ AFS_LDFLAGS=
+ AFS_LIBS="-lafsauthent -lafsrpc"
+ AC_SUBST([AFS_CPPFLAGS])
+ AC_SUBST([AFS_LDFLAGS])
+ AC_SUBST([AFS_LIBS])
+ AC_ARG_WITH([afs],
+    [AC_HELP_STRING([--with-afs@<:@=DIR@:>@],
+        [Compile with AFS kaserver sync support])],
+    [AS_IF([test x"$withval" != xno],
+        [rra_afs=true
+         AS_IF([test x"$withval" != xyes],
+            [AFS_CPPFLAGS="-I${withval}/include"
+             AFS_LDFLAGS="-L${withval}/lib"])
+         _RRA_LIB_AFS_CHECK
+         AC_DEFINE([HAVE_AFS], 1,
+             [Define to enable AFS kaserver support.])])])])