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two autoconf bugs
From: |
Werner LEMBERG |
Subject: |
two autoconf bugs |
Date: |
Tue, 15 Apr 2003 20:52:11 +0200 (CEST) |
Akim,
almost three months ago I sent two bug reports (repeated below). At
least the second one is serious IMHO. Anything new here? I'd really
like to see this fixed.
Werner
======================================================================
Consider the following:
AC_DEFUN(GROFF_SRAND, [
AC_LANG_PUSH(C++)
AC_MSG_CHECKING([for return type of srand])
AC_COMPILE_IFELSE([
AC_LANG_PROGRAM([[
#include <stdlib.h>
extern "C" { void srand(unsigned int); }
]])
], [
AC_MSG_RESULT(void)
AC_DEFINE(RET_TYPE_SRAND_IS_VOID, 1,
[Define if srand() returns void not int.])
], [
AC_MSG_RESULT(int)
])
AC_LANG_POP(C++)
])
Look how `AC_LANG_PROGRAM' is indented by four spaces. After macro
expansion, you get
#line $LINENO "configure"
/* confdefs.h. */
...
which is incorrect, of course. I think the start of
AC_LANG_SOURCE(C) in c.m4 shouldn't be
m4_define([AC_LANG_SOURCE(C)],
[#line $LINENO "configure"
/* confdefs.h. */
but
m4_define([AC_LANG_SOURCE(C)],[
#line $LINENO "configure"
/* confdefs.h. */
to protect against indentation.
Werner
======================================================================
[autoconf 2.57]
With autoconf 2.54, a call to AC_DECL_SYS_SIGLIST gives
checking for sys_siglist declaration in signal.h or unistd.h... yes
With 2.57, I get
checking whether sys_siglist is declared... no
Reason is that `signal.h' is no longer included; only the default
set of header files is used.
Werner
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