[linux-cifs-client] [PATCH] autotools: don't link mount.cifs against krb5 library

[Jeff Layton]

mount.cifs is being linked against the krb5 library. Fix it so that
that doesn't happen.

Signed-off-by: Jeff Layton <jlayton at redhat.com>
---
 Makefile.am  |    2 +-
 configure.ac |   11 ++++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/Makefile.am b/Makefile.am
index 605206e..9cf25f6 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -11,7 +11,7 @@ man_MANS = mount.cifs.8
 if CONFIG_CIFSUPCALL
 sbin_PROGRAMS = cifs.upcall
 cifs_upcall_SOURCES = cifs.upcall.c data_blob.c asn1.c spnego.c util.c
-cifs_upcall_LDADD = -ltalloc -lkrb5 -lkeyutils
+cifs_upcall_LDADD = -ltalloc -lkeyutils @KRB5_LDADD@
 man_MANS += cifs.upcall.8
 endif
 
diff --git a/configure.ac b/configure.ac
index b621750..a64113a 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,7 +76,10 @@ if test $enable_cifsupcall != "no"; then
 			])
 fi
 if test $enable_cifsupcall != "no"; then
-	AC_CHECK_LIB([krb5], [krb5_init_context])
+	AC_CHECK_LIB([krb5], [krb5_init_context],
+			[ KRB5_LDADD='-lkrb5' ],
+			AC_MSG_ERROR([no functioning krb5 library found!]))
+	AC_SUBST(KRB5_LDADD)
 fi
 
 # Checks for typedefs, structures, and compiler characteristics.
@@ -97,6 +100,10 @@ AC_FUNC_STRNLEN
 # check for required functions
 AC_CHECK_FUNCS([alarm atexit endpwent getmntent getpass gettimeofday inet_ntop memset realpath setenv strchr strdup strerror strncasecmp strndup strpbrk strrchr strstr strtol strtoul uname], , [AC_MSG_ERROR([necessary functions(s) not found])])
 
+# ugly, but I'm not sure how to check for functions in a library that's not in $LIBS
+cu_saved_libs=$LIBS
+LIBS="$LIBS $KRB5_LDADD"
+
 # determine whether we can use MIT's new 'krb5_auth_con_getsendsubkey' to extract the signing key
 if test $enable_cifsupcall != "no"; then
 	AC_CHECK_FUNCS([krb5_auth_con_getsendsubkey])
@@ -107,6 +114,8 @@ if test $enable_cifsupcall != "no"; then
 	AC_CHECK_FUNCS([krb5_principal_get_realm krb5_free_unparsed_name])
 fi
 
+LIBS=$cu_saved_libs
+
 AM_CONDITIONAL(CONFIG_CIFSUPCALL, [test "$enable_cifsupcall" != "no"])
 
 AC_LIBCAP
-- 
1.6.6.1