Re: Suppressing GNULIB_TEST_MKTIME etc. in emacs/src/config.in

[Bruno Haible]

Hi Paul,

> put the following into configure.in:
> 
>    AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
> 
> This zaps the macro that generates the unwanted GNULIB_TEST_ indicators.

This is a good enough solution, IMO.

>  * Define a new macro in gnulib that does the above AC_DEFUN, then
>    invoke that macro in configure.in.

This would be slightly better, indeed.

>  * Add an optional parameter to gl_EARLY that causes it to do the
>    above AC_DEFUN.

I'd like to reserve optional parameters to more important customizations than
this one.

>  * Modify gnulib-tool to generate the above AC_DEFUN if the user
>    is not importing any test modules.

This is not possible, because there may be multiple gnulib-tool invocations
in the scope of a single configure.ac; one of the invocations may import
test module while the other doesn't.

I'm applying this:


2011-01-20  Bruno Haible  <address@hidden>

        Allow the user to avoid the GNULIB_TEST_* macros.
        * m4/gnulib-common.m4 (gl_ASSERT_NO_GNULIB_TESTS): New macro.
        Suggested by Paul Eggert.

--- m4/gnulib-common.m4.orig    Thu Jan 20 10:31:02 2011
+++ m4/gnulib-common.m4 Thu Jan 20 10:30:11 2011
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 21
+# gnulib-common.m4 serial 22
 dnl Copyright (C) 2007-2011 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -102,6 +102,16 @@
     [Define to 1 when the gnulib module $1 should be tested.])
 ])
 
+# gl_ASSERT_NO_GNULIB_TESTS
+# asserts that there will be no gnulib tests in the scope of the configure.ac
+# and thereby enables an optimization of config.h.
+# Used by Emacs.
+AC_DEFUN([gl_ASSERT_NO_GNULIB_TESTS],
+[
+  dnl Override gl_MODULE_INDICATOR_FOR_TESTS.
+  AC_DEFUN([gl_MODULE_INDICATOR_FOR_TESTS], [])
+])
+
 # Test whether <features.h> exists.
 # Set HAVE_FEATURES_H.
 AC_DEFUN([gl_FEATURES_H],