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maint: Run 'make update-copyright'
author Paul Eggert <eggert@cs.ucla.edu>
date Tue, 01 Jan 2019 00:25:11 +0100
parents 10eb9086bea0
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
17857
d5c1be666ecc Fix check for pthreads.h pollution on Mingw64
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1 # pthread.m4 serial 10
40057
b06060465f09 maint: Run 'make update-copyright'
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2 dnl Copyright (C) 2009-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_PTHREAD_CHECK],
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8 [
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9 AC_REQUIRE([gl_PTHREAD_DEFAULTS])
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10 gl_CHECK_NEXT_HEADERS([pthread.h])
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11 if test $ac_cv_header_pthread_h = yes; then
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12 HAVE_PTHREAD_H=1
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13 # mingw 3.0 uses winpthreads which installs broken macros via <pthread.h>
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14 AC_CACHE_CHECK([whether <pthread.h> pollutes the namespace],
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15 [gl_cv_header_pthread_h_pollution],
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16 [AC_COMPILE_IFELSE(
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17 [AC_LANG_PROGRAM(
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18 [[#include <pthread.h>
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19 #if defined strtok_r || defined localtime_r
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20 #error
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21 break me
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22 #endif
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23 ]])],
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24 [gl_cv_header_pthread_h_pollution=no],
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25 [gl_cv_header_pthread_h_pollution=yes])])
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26 else
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27 HAVE_PTHREAD_H=0
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28 fi
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29
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30 AC_CHECK_TYPES([pthread_t, pthread_spinlock_t], [], [],
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31 [AC_INCLUDES_DEFAULT[
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32 #if HAVE_PTHREAD_H
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33 #include <pthread.h>
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34 #endif]])
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35 if test $ac_cv_type_pthread_t != yes; then
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36 HAVE_PTHREAD_T=0
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37 fi
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38 if test $ac_cv_type_pthread_spinlock_t != yes; then
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39 HAVE_PTHREAD_SPINLOCK_T=0
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40 fi
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41
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42 if test $ac_cv_header_pthread_h != yes ||
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43 test $ac_cv_type_pthread_t != yes ||
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44 test $ac_cv_type_pthread_spinlock_t != yes; then
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45 PTHREAD_H='pthread.h'
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46 AC_LIBOBJ([pthread])
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47 elif test $gl_cv_header_pthread_h_pollution = yes; then
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48 PTHREAD_H=pthread.h
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49 else
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50 PTHREAD_H=
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51 fi
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52 AC_SUBST([PTHREAD_H])
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53 AM_CONDITIONAL([GL_GENERATE_PTHREAD_H], [test -n "$PTHREAD_H"])
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54
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55 LIB_PTHREAD=
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56 if test $ac_cv_header_pthread_h = yes; then
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57 dnl We cannot use AC_SEARCH_LIBS here, because on OSF/1 5.1 pthread_join
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58 dnl is defined as a macro which expands to __phread_join, and libpthread
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59 dnl contains a definition for __phread_join but none for pthread_join.
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60 dnl Also, FreeBSD 9 puts pthread_create in libpthread and pthread_join
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61 dnl in libc, whereas on IRIX 6.5 the reverse is true; so check for both.
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62 AC_CACHE_CHECK([for library containing pthread_create and pthread_join],
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63 [gl_cv_lib_pthread],
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64 [gl_saved_libs=$LIBS
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65 gl_cv_lib_pthread=
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66 for gl_lib_prefix in '' '-pthread' '-lpthread'; do
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67 LIBS="$gl_lib_prefix $gl_saved_libs"
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68 AC_LINK_IFELSE(
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69 [AC_LANG_PROGRAM(
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70 [[#include <pthread.h>
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71 void *noop (void *p) { return p; }]],
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72 [[pthread_t pt;
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73 void *arg = 0;
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74 pthread_create (&pt, 0, noop, arg);
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75 pthread_join (pthread_self (), &arg);]])],
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76 [if test -z "$gl_lib_prefix"; then
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77 gl_cv_lib_pthread="none required"
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78 else
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79 gl_cv_lib_pthread=$gl_lib_prefix
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80 fi])
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81 test -n "$gl_cv_lib_pthread" && break
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82 done
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83 LIBS="$gl_saved_libs"
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84 ])
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85 if test "$gl_cv_lib_pthread" != "none required"; then
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86 LIB_PTHREAD="$gl_cv_lib_pthread"
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87 fi
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88 fi
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89 AC_SUBST([LIB_PTHREAD])
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90
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91 AC_REQUIRE([AC_C_RESTRICT])
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92 ])
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93
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94 AC_DEFUN([gl_PTHREAD_DEFAULTS],
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95 [
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96 dnl Assume proper GNU behavior unless another module says otherwise.
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97 HAVE_PTHREAD_H=1; AC_SUBST([HAVE_PTHREAD_H])
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98 HAVE_PTHREAD_T=1; AC_SUBST([HAVE_PTHREAD_T])
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99 HAVE_PTHREAD_SPINLOCK_T=1; AC_SUBST([HAVE_PTHREAD_SPINLOCK_T])
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100 ])