Robustify the kerberos checks

svn path=/trunk/; revision=5118

1 files changed, 48 insertions, 17 deletions

diff --git a/configure.in b/configure.in
index 1b5a2e8ceb..a163f4da98 100644
--- a/configure.in
+++ b/configure.in
@@ -386,26 +386,57 @@ dnl Kerberos
 dnl ********
 AC_ARG_WITH(krb5, [  --with-krb5=PREFIX      Location of Kerberos 5 libs/includes])
 AC_ARG_WITH(krb4, [  --with-krb4=PREFIX      Location of Kerberos 4 libs/includes])
-AC_MSG_CHECKING(for Kerberos 5)
-AC_MSG_RESULT(${with_krb5:=no})
-if test x$with_krb5 != xno; then
-	KRB5_CFLAGS="-I$with_krb5/include/krb5"
-	KRB5_LDFLAGS="-L$with_krb5/lib -lkrb5 -lk5crypto -lcom_err"
-	AC_DEFINE(HAVE_KRB5)
+if test x${with_krb5:=no} != xno; then
+	CFLAGS_save="$CFLAGS"
+	LDFLAGS_save="$LDFLAGS"
+	CFLAGS="-I$with_krb5/include/krb5"
+	LDFLAGS="-L$with_krb5/lib"
+	AC_CHECK_LIB(krb5, krb5_init_context,
+	[
+		AC_DEFINE(HAVE_KRB5)
+		KRB5_CFLAGS="$CFLAGS"
+		KRB5_LDFLAGS="$LDFLAGS -lkrb5 -lk5crypto -lcom_err"
+	],[
+		AC_MSG_WARN([A sample Kerberos 5 program could not be compiled with the
+Kerberos found in $with_krb5. Please verify that the prefix is correct.])
+		with_krb5=no
+	], [-lk5crypto -lcom_err])
+	CFLAGS="$CFLAGS_save"
+	LDFLAGS="$LIBS_save"
+else
+	AC_MSG_CHECKING(for Kerberos 5)
+	AC_MSG_RESULT($with_krb5)
 fi
-AC_MSG_CHECKING(for Kerberos 4)
-AC_MSG_RESULT(${with_krb4:=no})
-if test x$with_krb4 != xno; then
-	KRB4_CFLAGS="-I$with_krb4/include -I$with_krb4/include/kerberosIV $KRB5_CFLAGS"
-	save_LDFLAGS="$LDFLAGS"
-	LDFLAGS="$LDFLAGS -L$with_krb4/lib"
+
+if test x${with_krb4:=no} != xno; then
+	CFLAGS_save="$CFLAGS"
+	LDFLAGS_save="$LDFLAGS"
+	CFLAGS="-I$with_krb4/include"
+	LDFLAGS="-L$with_krb4/lib"
 	AC_CHECK_LIB(krb, krb_mk_req,
-		[KRB4_LDFLAGS="-L$with_krb4/lib -lkrb -ldes"],
-		[KRB4_LDFLAGS="-L$with_krb4/lib -lkrb4 -ldes425 -lkrb5 -lk5crypto -lcom_err"],
-		-ldes)
-	LDFLAGS="$save_LDFLAGS"
-	AC_DEFINE(HAVE_KRB4)
+	[
+		AC_DEFINE(HAVE_KRB4)
+		KRB4_CFLAGS="$CFLAGS"
+		KRB4_LDFLAGS="$LDFLAGS -lkrb -ldes"
+	],[
+		AC_CHECK_LIB(krb4, krb_mk_req,
+		[
+			AC_DEFINE(HAVE_KRB4)
+			KRB4_CFLAGS="$CFLAGS"
+			KRB4_LDFLAGS="$LDFLAGS -lkrb4 -ldes425 $KRB5_LDFLAGS"
+		],[
+			AC_MSG_WARN([A sample Kerberos 4 program could not be compiled with the
+Kerberos found in $with_krb4. Please verify that the prefix is correct.])
+			with_krb4=no
+		],[-ldes425 $KRB5_LDFLAGS])
+	], [-ldes])
+	CFLAGS="$CFLAGS_save"
+	LDFLAGS="$LIBS_save"
+else
+	AC_MSG_CHECKING(for Kerberos 4)
+	AC_MSG_RESULT(${with_krb4})
 fi
+
 AC_SUBST(KRB5_CFLAGS)
 AC_SUBST(KRB5_LDFLAGS)
 AC_SUBST(KRB4_CFLAGS)