*** empty log message ***

diff --git a/m4/ChangeLog b/m4/ChangeLog
index a279d657e9035b3911f798d0232e096366d1c740..e941b604dee59056f18967d925ece6d734c0b9d9 100644 (file)
--- a/m4/ChangeLog
+++ b/m4/ChangeLog
@@ -1,3 +1,17 @@
+2001-07-02  Jim Meyering  <meyering@lucent.com>
+
+       The following changes were prompted by suggestions from Bruno Haible.
+
+       * jm-glibc-io.m4n: New file, the template from which jm-glibc-io.m4
+       is now generated.
+       * Makefile.am.in (Makefile.am): Include jm-glibc-io.m4n in emitted
+       definition of EXTRA_DIST.
+       (Makefile.am): Emit the dependency, `all-local: jm-glibc-io.m4' to
+       ensure that the generated file is created/updated whenever the list
+       of $(unlocked_functions) is changed.
+       (jm-glibc-io.m4): New rule.
+       (unlocked-io.h): New rule -- currently unused.
+
 2001-06-24  Jim Meyering  <meyering@lucent.com>
 
        * regex.m4 (jm_INCLUDED_REGEX): Use a quadrigraph to represent an

diff --git a/m4/jm-glibc-io.m4n b/m4/jm-glibc-io.m4n
new file mode 100644 (file)
index 0000000..5974107
--- /dev/null
+++ b/m4/jm-glibc-io.m4n
@@ -0,0 +1,33 @@
+#serial 5 -*- autoconf -*-
+
+dnl From Jim Meyering.
+dnl
+dnl See if the glibc *_unlocked I/O macros are available.
+dnl Use only those *_unlocked macros that are declared.
+dnl
+
+AC_DEFUN(jm_FUNC_GLIBC_UNLOCKED_IO,
+  [
+    # Kludge (not executed) to make autoheader do the right thing.
+    if test a = b; then
+      AC_CHECK_DECLS([@comma_separated@])
+      AC_CHECK_FUNCS(@space_separated@)
+    fi
+
+    io_functions='@space_separated@'
+
+    for jm_io_func in $io_functions; do
+      # Check for the existence of each function only if it is declared.
+      # Otherwise, we'd get the Solaris5.5.1 functions that are not
+      # declared, and that have been removed from Solaris5.6.  The resulting
+      # 5.5.1 binaries would not run on 5.6 due to shared library differences.
+      AC_CHECK_DECLS([$jm_io_func],
+                    jm_declared=yes,
+                    jm_declared=no,
+                    [#include <stdio.h>])
+      if test $jm_declared = yes; then
+        AC_CHECK_FUNCS($jm_io_func)
+      fi
+    done
+  ]
+)