I thought this module might be useful for people trying to build
executables on systems like Solaris where the "-lrt" option causes the
executable to dynamically link to rt, even if the executable does not
need any of the rt routines.
I couldn't find any section for this in MODULES.html.sh, so I invented
a new one. Not sure if it's named well.
2006-01-09 Paul Eggert <[EMAIL PROTECTED]>
Sync from coreutils.
* MODULES.html.sh (build_lib): New section, with new lib-ignore module.
* modules/lib-ignore: New file.
* m4/lib-ignore.m4: New file.
--- MODULES.html.sh.~1.111.~ 2005-12-16 07:05:12.000000000 -0800
+++ MODULES.html.sh 2006-01-09 15:39:11.000000000 -0800
@@ -1,6 +1,6 @@
#!/bin/sh
#
-# Copyright (C) 2002-2005 Free Software Foundation, Inc.
+# Copyright (C) 2002-2006 Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
@@ -2042,6 +2042,15 @@ func_all_modules ()
func_module sysexits
func_module visibility
func_end_table
+
+ element="Support for building libraries and executables"
+ func_section_wrap build_lib
+ func_wrap H2
+ func_echo "$element"
+
+ func_begin_table
+ func_module lib-ignore
+ func_end_table
}
--- /dev/null 2005-09-24 22:00:15.000000000 -0700
+++ m4/lib-ignore.m4 2006-01-09 10:42:51.000000000 -0800
@@ -0,0 +1,43 @@
+# If possible, ignore libraries that are not depended on.
+
+dnl Copyright (C) 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+dnl Written by Paul Eggert.
+
+AC_DEFUN([gl_IGNORE_UNUSED_LIBRARIES],
+[
+ AC_CACHE_CHECK([for flag to ignore unused libraries],
+ [gl_cv_ignore_unused_libraries],
+ [gl_cv_ignore_unused_libraries=none
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ [gl_ldd_output0=`(ldd conftest$ac_exeext) 2>/dev/null` ||
+ gl_ldd_output0=])
+ if test "$gl_ldd_output0"; then
+ gl_saved_ldflags=$LDFLAGS
+ gl_saved_libs=$LIBS
+ LIBS="$LIBS -lm"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ [gl_ldd_output1=`(ldd conftest$ac_exeext) 2>/dev/null` ||
+ gl_ldd_output1=])
+ if test "$gl_ldd_output1" && test "$gl_ldd_output0" != "$gl_ldd_output1"
+ then
+ for gl_flags in '-Xlinker -zignore' '-zignore'; do
+ LDFLAGS="$gl_flags $LDFLAGS"
+ AC_LINK_IFELSE([AC_LANG_PROGRAM()],
+ [if gl_ldd_output2=`(ldd conftest$ac_exeext) 2>/dev/null` &&
+ test "$gl_ldd_output0" = "$gl_ldd_output2"; then
+ gl_cv_ignore_unused_libraries=$gl_flags
+ fi])
+ LDFLAGS=$gl_saved_ldflags
+ test "gl_cv_ignore_unused_libraries" != none && break
+ done
+ fi
+ LIBS=$gl_saved_LIBS
+ fi])
+
+ test "$gl_cv_ignore_unused_libraries" != none &&
+ LDFLAGS="$LDFLAGS $gl_cv_ignore_unused_libraries"
+])
--- /dev/null 2005-09-24 22:00:15.000000000 -0700
+++ modules/lib-ignore 2006-01-09 15:08:36.000000000 -0800
@@ -0,0 +1,20 @@
+Description:
+If possible, ignore libraries that are not depended on.
+
+Files:
+m4/lib-ignore.m4
+
+Depends-on:
+
+configure.ac:
+gl_IGNORE_UNUSED_LIBRARIES
+
+Makefile.am:
+
+Include:
+
+License:
+GPL
+
+Maintainer:
+Paul Eggert and Jim Meyering
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