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
78
79
80
81
82
83
84
85
86
87
88
89
90
|
# stack-trace.m4
# serial 4
dnl Copyright (C) 2024-2025 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 This file is offered as-is, without any warranty.
AC_DEFUN([gl_STACK_TRACE_EARLY],
[
AC_MSG_CHECKING([whether to enable debugging facilities])
AC_ARG_ENABLE([debug],
[AS_HELP_STRING([[--disable-debug]],
[turn off debugging facilities])],
[case "$enableval" in
yes | no) ;;
*) AC_MSG_WARN([invalid argument supplied to --enable-debug])
enable_debug=yes
;;
esac
],
[enable_debug=yes])
AC_MSG_RESULT([$enable_debug])
AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
if test $enable_debug = yes; then
dnl The first choice is libbacktrace by Ian Lance Taylor.
dnl Maintained at https://github.com/ianlancetaylor/libbacktrace,
dnl mirrored into GCC, installed as part of GCC by a few distros.
dnl It produces source file names and line numbers, if the binary
dnl is compiled with debug information.
AC_CACHE_CHECK([for libbacktrace], [gl_cv_lib_backtrace], [
gl_saved_LIBS="$LIBS"
LIBS="$gl_saved_LIBS -lbacktrace"
AC_LINK_IFELSE(
[AC_LANG_PROGRAM(
[[#include <backtrace.h>
]],
[[struct backtrace_state *state =
backtrace_create_state (NULL, 0, NULL, NULL);
]])],
[gl_cv_lib_backtrace=yes],
[gl_cv_lib_backtrace=no])
LIBS="$gl_saved_LIBS"
])
if test $gl_cv_lib_backtrace = yes; then
AC_DEFINE([HAVE_LIBBACKTRACE], [1],
[Define if you have the libbacktrace library.])
CAN_PRINT_STACK_TRACE=1
LIBS="$LIBS -lbacktrace"
else
dnl The second choice is libexecinfo.
dnl It does not produce source file names and line numbers, only addresses
dnl (which are mostly useless due to ASLR) and _sometimes_ function names.
AC_REQUIRE([AC_CANONICAL_HOST])
case "$host_os" in
*-gnu* | gnu* | darwin* | freebsd* | dragonfly* | netbsd* | openbsd* | solaris*)
dnl execinfo might be implemented on this platform.
CAN_PRINT_STACK_TRACE=1
dnl On *BSD system, link all programs with -lexecinfo, provided that
dnl libexecinfo actually exists. Cf. m4/execinfo.m4.
case "$host_os" in
freebsd* | dragonfly* | netbsd* | openbsd*)
AC_SEARCH_LIBS([backtrace_symbols_fd], [execinfo],
[], [CAN_PRINT_STACK_TRACE=0])
if test $CAN_PRINT_STACK_TRACE = 1; then
LIBS="$LIBS -lexecinfo"
fi
;;
esac
if test $CAN_PRINT_STACK_TRACE = 1; then
dnl Link all programs in such a way that the stack trace includes
dnl the function names.
dnl '-rdynamic' is equivalent to '-Wl,-export-dynamic'.
case "$host_os" in
*-gnu* | gnu* | openbsd*)
LDFLAGS="$LDFLAGS -rdynamic"
;;
esac
fi
;;
esac
fi
fi
])
AC_DEFUN([gl_STACK_TRACE],
[
AC_REQUIRE([AC_C_INLINE])
])
|
