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f6ea5628 | 1 | # gnulib-common.m4 serial 3 |
4c38e0a4 | 2 | dnl Copyright (C) 2007, 2009, 2010 Free Software Foundation, Inc. |
f6ea5628 DJ |
3 | dnl This file is free software; the Free Software Foundation |
4 | dnl gives unlimited permission to copy and/or distribute it, | |
5 | dnl with or without modifications, as long as this notice is preserved. | |
6 | ||
7 | # gl_MODULE_INDICATOR([modulename]) | |
8 | # defines a C macro indicating the presence of the given module. | |
9 | AC_DEFUN([gl_MODULE_INDICATOR], | |
10 | [ | |
11 | AC_DEFINE([GNULIB_]translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___]), [1], | |
12 | [Define to 1 when using the gnulib module ]$1[.]) | |
13 | ]) | |
14 | ||
15 | # AC_PROG_MKDIR_P | |
16 | # is a backport of autoconf-2.60's AC_PROG_MKDIR_P. | |
17 | # Remove this macro when we can assume autoconf >= 2.60. | |
18 | m4_ifdef([AC_PROG_MKDIR_P], [], [ | |
19 | AC_DEFUN([AC_PROG_MKDIR_P], | |
20 | [AC_REQUIRE([AM_PROG_MKDIR_P])dnl defined by automake | |
21 | MKDIR_P='$(mkdir_p)' | |
22 | AC_SUBST([MKDIR_P])])]) | |
23 | ||
24 | # AC_C_RESTRICT | |
25 | # This definition overrides the AC_C_RESTRICT macro from autoconf 2.60..2.61, | |
26 | # so that mixed use of GNU C and GNU C++ and mixed use of Sun C and Sun C++ | |
27 | # works. | |
28 | # This definition can be removed once autoconf >= 2.62 can be assumed. | |
29 | AC_DEFUN([AC_C_RESTRICT], | |
30 | [AC_CACHE_CHECK([for C/C++ restrict keyword], ac_cv_c_restrict, | |
31 | [ac_cv_c_restrict=no | |
32 | # The order here caters to the fact that C++ does not require restrict. | |
33 | for ac_kw in __restrict __restrict__ _Restrict restrict; do | |
34 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM( | |
35 | [[typedef int * int_ptr; | |
36 | int foo (int_ptr $ac_kw ip) { | |
37 | return ip[0]; | |
38 | }]], | |
39 | [[int s[1]; | |
40 | int * $ac_kw t = s; | |
41 | t[0] = 0; | |
42 | return foo(t)]])], | |
43 | [ac_cv_c_restrict=$ac_kw]) | |
44 | test "$ac_cv_c_restrict" != no && break | |
45 | done | |
46 | ]) | |
47 | AH_VERBATIM([restrict], | |
48 | [/* Define to the equivalent of the C99 'restrict' keyword, or to | |
49 | nothing if this is not supported. Do not define if restrict is | |
50 | supported directly. */ | |
51 | #undef restrict | |
52 | /* Work around a bug in Sun C++: it does not support _Restrict, even | |
53 | though the corresponding Sun C compiler does, which causes | |
54 | "#define restrict _Restrict" in the previous line. Perhaps some future | |
55 | version of Sun C++ will work with _Restrict; if so, it'll probably | |
56 | define __RESTRICT, just as Sun C does. */ | |
57 | #if defined __SUNPRO_CC && !defined __RESTRICT | |
58 | # define _Restrict | |
59 | #endif]) | |
60 | case $ac_cv_c_restrict in | |
61 | restrict) ;; | |
62 | no) AC_DEFINE([restrict], []) ;; | |
63 | *) AC_DEFINE_UNQUOTED([restrict], [$ac_cv_c_restrict]) ;; | |
64 | esac | |
65 | ]) |