ln: add the --relative option

[platform/upstream/coreutils.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index a174178..5a4860e 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1,7 +1,7 @@
 # -*- autoconf -*-
 # Process this file with autoconf to produce a configure script.
 
-# Copyright (C) 1991, 1993-2011 Free Software Foundation, Inc.
+# Copyright (C) 1991-2012 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
@@ -35,6 +35,20 @@ AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
 AM_INIT_AUTOMAKE([1.11.1 no-dist-gzip dist-xz color-tests parallel-tests])
 AM_SILENT_RULES([yes]) # make --enable-silent-rules the default.
 
+dnl POSIXCHECK is worthwhile for maintainers, but adds several seconds
+dnl (more than 10% execution time) to ./configure, with no benefit for
+dnl most users.  Using it to look for bugs requires:
+dnl   GNULIB_POSIXCHECK=1 autoreconf -f
+dnl   ./configure
+dnl   make
+dnl   make -C src clean
+dnl   make CFLAGS=-DGNULIB_POSIXCHECK=1
+dnl FIXME: Once we figure out how to avoid false positives, we should
+dnl have 'make my-distcheck' in dist-check.mk exercise this.
+m4_syscmd([test "${GNULIB_POSIXCHECK+set}" = set])
+m4_if(m4_sysval, [0], [], [dnl
+gl_ASSERT_NO_GNULIB_POSIXCHECK])
+
 AC_PROG_CC_STDC
 AM_PROG_CC_C_O
 AC_PROG_CPP
@@ -122,7 +136,6 @@ if test "$gl_gcc_warnings" = yes; then
   gl_WARN_ADD([-Wsuggest-attribute=const])
   gl_WARN_ADD([-Wsuggest-attribute=noreturn])
   gl_WARN_ADD([-Wno-format-nonliteral])
-  gl_WARN_ADD([-Wno-unsuffixed-float-constants])
 
   # Enable this warning only with gcc-4.7 and newer.  With 4.6.2 20111027,
   # it suggests test.c's advance function may be pure, even though it
@@ -156,15 +169,15 @@ if test "$gl_gcc_warnings" = yes; then
   # FIXME: it may be easy to remove this, since it affects only one file:
   # the snprintf call at ftoastr.c:132.
   nw="$nw -Wdouble-promotion"
-  # FIXME: remove/reenable the following two, once gnulib is adjusted.
-  nw="$nw -Wsuggest-attribute=const"
-  nw="$nw -Wsuggest-attribute=pure"
   gl_MANYWARN_COMPLEMENT([GNULIB_WARN_CFLAGS], [$WARN_CFLAGS], [$nw])
   AC_SUBST([GNULIB_WARN_CFLAGS])
 
   # For gnulib-tests, the set is slightly smaller still.
   nw=
   nw="$nw -Wstrict-prototypes"
+  # It's not worth being this picky about test programs.
+  nw="$nw -Wsuggest-attribute=const"
+  nw="$nw -Wsuggest-attribute=pure"
   gl_MANYWARN_COMPLEMENT([GNULIB_TEST_WARN_CFLAGS],
                          [$GNULIB_WARN_CFLAGS], [$nw])
   AC_SUBST([GNULIB_TEST_WARN_CFLAGS])