1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
# Autoconf macros for xdvik.
# Copyright (C) 2002 - 2009 Paul Vojta <xdvi-core@lists.sourceforge.net>
# Copyright (C) 2009 Peter Breitenlohner <tex-live@tug.org>
#
# This file is free software; the copyright holders
# give unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# XDVI_LINKER_MULTIPLE_DEFNS
# --------------------------
# Check if the --allow-multiple-definition linker flag is
# available (assuming that we need to use it if it is).
# If it isn't, check if the linker accepts multiple definitions,
# and if it doesn't, don't define LD_ALLOWS_MULTIPLE_DEFINITIONS.
AC_DEFUN([XDVI_LINKER_MULTIPLE_DEFNS],
[AC_CACHE_CHECK([whether linker supports the --allow-multiple-definition flag],
[xdvi_cv_linker_multiple_defns],
[xdvi_save_LDFLAGS=$LDFLAGS
LDFLAGS="-Xlinker --allow-multiple-definition"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <stdio.h>]],
[[void foo(void);]])],
[xdvi_cv_linker_multiple_defns=yes],
[xdvi_cv_linker_multiple_defns=no])
LDFLAGS=$xdvi_save_LDFLAGS])
x_linker_options=""
AS_CASE([$xdvi_cv_linker_multiple_defns],
[yes], [x_linker_options="-Xlinker --allow-multiple-definition"],
["by default"], [],
[AC_MSG_CHECKING([whether linker supports multiple definitions])
xdvi_ld_save_LIBS=$LIBS
xdvi_ld_save_CFLAGS=$CFLAGS
xdvi_ld_save_CPPFLAGS=$CPPFLAGS
xdvi_ld_save_LDFLAGS=$LDFLAGS
LIBS="$X_PRE_LIBS -lXt -lX11 $X_EXTRA_LIBS $LIBS"
CFLAGS="$X_CFLAGS $CFLAGS"
CPPFLAGS="$X_CFLAGS $CPPFLAGS"
LDFLAGS="$X_LIBS $LDFLAGS"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[#include <X11/Intrinsic.h>
XtIntervalId XtAppAddTimeOut(XtAppContext app,
unsigned long interval,
XtTimerCallbackProc proc,
XtPointer closure)
{
(void)app; (void)interval; (void)proc; (void)closure;
return (XtIntervalId)0;
}
]],
[[XtIntervalId i = 0; XtRemoveTimeOut(i);]])],
[xdvi_cv_linker_multiple_defns="by default"])
LIBS=$xdvi_ld_save_LIBS
CFLAGS=$xdvi_ld_save_CFLAGS
CPPFLAGS=$xdvi_ld_save_CPPFLAGS
LDFLAGS=$xdvi_ld_save_LDFLAGS
AC_MSG_RESULT([$xdvi_cv_linker_multiple_defns])])
if test "x$xdvi_cv_linker_multiple_defns" != xno; then
AC_DEFINE([LD_ALLOWS_MULTIPLE_DEFINITIONS], 1,
[Define if your system allows multiple definitions of functions.])
else
AC_MSG_WARN([Linker does not allow multiple definitions.
*****************************************************************
* Warning: Your linker does not allow multiple definitions. *
* This does not make xdvik unusable, but it will cause problems *
* with event handling: Some widgets, e.g. the print log window, *
* tooltips, statusline messages and hyperlink location markers *
* will not be updated until the mouse is moved. *
*****************************************************************])
fi
AC_SUBST([x_linker_options])
]) # XDVI_LINKER_MULTIPLE_DEFNS
|
