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9c9d63b1 PM |
1 | # setlocale_null.m4 serial 4 |
2 | dnl Copyright (C) 2019-2021 Free Software Foundation, Inc. | |
5df4cba6 SM |
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 | AC_DEFUN([gl_FUNC_SETLOCALE_NULL], | |
8 | [ | |
9 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
10 | AC_REQUIRE([gl_PTHREADLIB]) | |
11 | AC_CHECK_HEADERS_ONCE([threads.h]) | |
12 | ||
13 | AC_CACHE_CHECK([whether setlocale (LC_ALL, NULL) is multithread-safe], | |
14 | [gl_cv_func_setlocale_null_all_mtsafe], | |
15 | [case "$host_os" in | |
16 | # Guess no on musl libc, macOS, FreeBSD, NetBSD, OpenBSD, AIX, Haiku, Cygwin. | |
17 | *-musl* | darwin* | freebsd* | netbsd* | openbsd* | aix* | haiku* | cygwin*) | |
18 | gl_cv_func_setlocale_null_all_mtsafe=no ;; | |
19 | # Guess yes on glibc, HP-UX, IRIX, Solaris, native Windows. | |
20 | *-gnu* | gnu* | hpux* | irix* | solaris* | mingw*) | |
21 | gl_cv_func_setlocale_null_all_mtsafe=yes ;; | |
22 | # If we don't know, obey --enable-cross-guesses. | |
23 | *) | |
24 | gl_cv_func_setlocale_null_all_mtsafe="$gl_cross_guess_normal" ;; | |
25 | esac | |
26 | ]) | |
27 | dnl On platforms without multithreading, there is no issue. | |
28 | case "$host_os" in | |
29 | mingw*) ;; | |
30 | *) | |
31 | if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then | |
32 | gl_cv_func_setlocale_null_all_mtsafe="trivially yes" | |
33 | fi | |
34 | ;; | |
35 | esac | |
36 | case "$gl_cv_func_setlocale_null_all_mtsafe" in | |
37 | *yes) SETLOCALE_NULL_ALL_MTSAFE=1 ;; | |
38 | *) SETLOCALE_NULL_ALL_MTSAFE=0 ;; | |
39 | esac | |
40 | AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ALL_MTSAFE], [$SETLOCALE_NULL_ALL_MTSAFE], | |
41 | [Define to 1 if setlocale (LC_ALL, NULL) is multithread-safe.]) | |
42 | ||
43 | dnl This is about a single category (not LC_ALL). | |
44 | AC_CACHE_CHECK([whether setlocale (category, NULL) is multithread-safe], | |
45 | [gl_cv_func_setlocale_null_one_mtsafe], | |
46 | [case "$host_os" in | |
47 | # Guess no on OpenBSD, AIX. | |
48 | openbsd* | aix*) | |
49 | gl_cv_func_setlocale_null_one_mtsafe=no ;; | |
50 | # Guess yes on glibc, musl libc, macOS, FreeBSD, NetBSD, HP-UX, IRIX, Solaris, Haiku, Cygwin, native Windows. | |
51 | *-gnu* | gnu* | *-musl* | darwin* | freebsd* | netbsd* | hpux* | irix* | solaris* | haiku* | cygwin* | mingw*) | |
52 | gl_cv_func_setlocale_null_one_mtsafe=yes ;; | |
53 | # If we don't know, obey --enable-cross-guesses. | |
54 | *) | |
55 | gl_cv_func_setlocale_null_one_mtsafe="$gl_cross_guess_normal" ;; | |
56 | esac | |
57 | ]) | |
58 | dnl On platforms without multithreading, there is no issue. | |
59 | case "$host_os" in | |
60 | mingw*) ;; | |
61 | *) | |
62 | if test $gl_pthread_api = no && test $ac_cv_header_threads_h = no; then | |
63 | gl_cv_func_setlocale_null_one_mtsafe="trivially yes" | |
64 | fi | |
65 | ;; | |
66 | esac | |
67 | case "$gl_cv_func_setlocale_null_one_mtsafe" in | |
68 | *yes) SETLOCALE_NULL_ONE_MTSAFE=1 ;; | |
69 | *) SETLOCALE_NULL_ONE_MTSAFE=0 ;; | |
70 | esac | |
71 | AC_DEFINE_UNQUOTED([SETLOCALE_NULL_ONE_MTSAFE], [$SETLOCALE_NULL_ONE_MTSAFE], | |
72 | [Define to 1 if setlocale (category, NULL) is multithread-safe.]) | |
73 | ||
74 | dnl Determine link dependencies of lib/setlocale_null.c and lib/setlocale-lock.c. | |
75 | if test $SETLOCALE_NULL_ALL_MTSAFE = 0 || test $SETLOCALE_NULL_ONE_MTSAFE = 0; then | |
76 | case "$host_os" in | |
77 | mingw*) LIB_SETLOCALE_NULL= ;; | |
78 | *) | |
79 | gl_WEAK_SYMBOLS | |
80 | case "$gl_cv_have_weak" in | |
81 | *yes) LIB_SETLOCALE_NULL= ;; | |
82 | *) LIB_SETLOCALE_NULL="$LIBPTHREAD" ;; | |
83 | esac | |
84 | ;; | |
85 | esac | |
86 | else | |
87 | LIB_SETLOCALE_NULL= | |
88 | fi | |
89 | dnl LIB_SETLOCALE_NULL is expected to be '-pthread' or '-lpthread' on AIX | |
90 | dnl with gcc or xlc, and empty otherwise. | |
91 | AC_SUBST([LIB_SETLOCALE_NULL]) | |
92 | ]) | |
93 | ||
94 | # Prerequisites of lib/setlocale-lock.c. | |
95 | AC_DEFUN([gl_PREREQ_SETLOCALE_LOCK], | |
96 | [ | |
97 | gl_VISIBILITY | |
98 | ]) |