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Annotation of embedaddon/libiconv/srcm4/lock.m4, revision 1.1

1.1     ! misho       1: # lock.m4 serial 10 (gettext-0.18)
        !             2: dnl Copyright (C) 2005-2009 Free Software Foundation, Inc.
        !             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: dnl From Bruno Haible.
        !             8: 
        !             9: AC_DEFUN([gl_LOCK],
        !            10: [
        !            11:   AC_REQUIRE([gl_THREADLIB])
        !            12:   if test "$gl_threads_api" = posix; then
        !            13:     # OSF/1 4.0 and MacOS X 10.1 lack the pthread_rwlock_t type and the
        !            14:     # pthread_rwlock_* functions.
        !            15:     AC_CHECK_TYPE([pthread_rwlock_t],
        !            16:       [AC_DEFINE([HAVE_PTHREAD_RWLOCK], [1],
        !            17:          [Define if the POSIX multithreading library has read/write locks.])],
        !            18:       [],
        !            19:       [#include <pthread.h>])
        !            20:     # glibc defines PTHREAD_MUTEX_RECURSIVE as enum, not as a macro.
        !            21:     AC_TRY_COMPILE([#include <pthread.h>],
        !            22:       [#if __FreeBSD__ == 4
        !            23: error "No, in FreeBSD 4.0 recursive mutexes actually don't work."
        !            24: #else
        !            25: int x = (int)PTHREAD_MUTEX_RECURSIVE;
        !            26: return !x;
        !            27: #endif],
        !            28:       [AC_DEFINE([HAVE_PTHREAD_MUTEX_RECURSIVE], [1],
        !            29:          [Define if the <pthread.h> defines PTHREAD_MUTEX_RECURSIVE.])])
        !            30:   fi
        !            31:   gl_PREREQ_LOCK
        !            32: ])
        !            33: 
        !            34: # Prerequisites of lib/lock.c.
        !            35: AC_DEFUN([gl_PREREQ_LOCK], [
        !            36:   AC_REQUIRE([AC_C_INLINE])
        !            37: ])