NicolÃs Lichtmaier <jnl@xxxxxxxxxxxxxxxxxx> writes: > $ cc -o test test.c > ./test > 3158136 > $ cc -std -o test test.c > ./test > 0 That's odd. The standards(5) man page for Tru64 5.1 <http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V51_HTML/MAN/MAN5/0001____.HTM> says "the cc command includes the -std flag by default". Is this incorrect? At any rate, I don't see how it hurts to use -std rather than -std1, given the described symptoms, so I installed the following patch. 2004-01-15 Paul Eggert <eggert@xxxxxxxxxxx> * lib/autoconf/c.m4 (_AC_PROG_CC_STDC): Try -std, not -std1, since -std1 disables some useful extensions on Tru64. Problem reported by N. Lichtmaier in <http://mail.gnu.org/archive/html/autoconf/2004-01/msg00100.html>. Index: lib/autoconf/c.m4 =================================================================== RCS file: /cvsroot/autoconf/autoconf/lib/autoconf/c.m4,v retrieving revision 1.183 diff -p -u -r1.183 c.m4 --- lib/autoconf/c.m4 23 Sep 2003 23:05:11 -0000 1.183 +++ lib/autoconf/c.m4 15 Jan 2004 18:17:15 -0000 @@ -1,6 +1,6 @@ # This file is part of Autoconf. -*- Autoconf -*- # Programming languages support. -# Copyright (C) 2001, 2002, 2003 Free Software Foundation, Inc. +# Copyright (C) 2001, 2002, 2003, 2004 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 @@ -824,10 +824,10 @@ static char *f (char * (*g) (char **, in /* OSF 4.0 Compaq cc is some sort of almost-ANSI by default. It has function prototypes and stuff, but not '\xHH' hex character constants. These don't provoke an error unfortunately, instead are silently treated - as 'x'. The following induces an error, until -std1 is added to get + as 'x'. The following induces an error, until -std is added to get proper ANSI mode. Curiously '\x00'!='x' always comes out true, for an array size at least. It's necessary to write '\x00'==0 to get something - that's true only with -std1. */ + that's true only with -std. */ int osf4_cc_array ['\x00' == 0 ? 1 : -1]; int test (int i, double x); @@ -840,11 +840,11 @@ char **argv;]], # Don't try gcc -ansi; that turns off useful extensions and # breaks some systems' header files. # AIX -qlanglvl=ansi -# Ultrix and OSF/1 -std1 +# Ultrix, OSF/1, Tru64 -std # HP-UX 10.20 and later -Ae # HP-UX older versions -Aa -D_HPUX_SOURCE # SVR4 -Xc -D__EXTENSIONS__ -for ac_arg in "" -qlanglvl=ansi -std1 -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__" +for ac_arg in "" -qlanglvl=ansi -std -Ae "-Aa -D_HPUX_SOURCE" "-Xc -D__EXTENSIONS__" do CC="$ac_save_CC $ac_arg" _AC_COMPILE_IFELSE([],
