Require autoconf 2.50 or newer (for m4_ifdef).

diff --git a/autoconf-lib-link/m4/ChangeLog b/autoconf-lib-link/m4/ChangeLog
index a8cfd59307bea98cf15fba60d36a4d7958b798d0..f4a14fcceb518c2a165050facf9d6c02e121cc5f 100644 (file)
--- a/autoconf-lib-link/m4/ChangeLog
+++ b/autoconf-lib-link/m4/ChangeLog
@@ -4,7 +4,8 @@
 
 2005-03-05  Bruno Haible  <bruno@clisp.org>
 
-       * lib-link.m4 (AC_LIB_RPATH): Use AC_REQUIRE_AUX_FILE conditionally.
+       * lib-link.m4: Require autoconf >= 2.50.
+       (AC_LIB_RPATH): Use AC_REQUIRE_AUX_FILE conditionally.
 
 2005-02-24  Bruno Haible  <bruno@clisp.org>
 

diff --git a/autoconf-lib-link/m4/lib-link.m4 b/autoconf-lib-link/m4/lib-link.m4
index 828c94fc8b8667c0b21adf0994789d186a56ec20..ea0b0c4ea6b85bbb799fb1cf6fb8844eb33de436 100644 (file)
--- a/autoconf-lib-link/m4/lib-link.m4
+++ b/autoconf-lib-link/m4/lib-link.m4
@@ -6,6 +6,8 @@ dnl with or without modifications, as long as this notice is preserved.
 
 dnl From Bruno Haible.
 
+AC_PREREQ(2.50)
+
 dnl AC_LIB_LINKFLAGS(name [, dependencies]) searches for libname and
 dnl the libraries corresponding to explicit and implicit dependencies.
 dnl Sets and AC_SUBSTs the LIB${NAME} and LTLIB${NAME} variables and