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Annotation of embedaddon/libiconv/srcm4/unlocked-io.m4, revision 1.1.1.3

1.1       misho       1: # unlocked-io.m4 serial 15
                      2: 
1.1.1.3 ! misho       3: # Copyright (C) 1998-2006, 2009-2019 Free Software Foundation, Inc.
1.1       misho       4: #
                      5: # This file is free software; the Free Software Foundation
                      6: # gives unlimited permission to copy and/or distribute it,
                      7: # with or without modifications, as long as this notice is preserved.
                      8: 
                      9: dnl From Jim Meyering.
                     10: dnl
                     11: dnl See if the glibc *_unlocked I/O macros or functions are available.
                     12: dnl Use only those *_unlocked macros or functions that are declared
                     13: dnl (because some of them were declared in Solaris 2.5.1 but were removed
                     14: dnl in Solaris 2.6, whereas we want binaries built on Solaris 2.5.1 to run
                     15: dnl on Solaris 2.6).
                     16: 
                     17: AC_DEFUN([gl_FUNC_GLIBC_UNLOCKED_IO],
                     18: [
                     19:   AC_DEFINE([USE_UNLOCKED_IO], [1],
                     20:     [Define to 1 if you want getc etc. to use unlocked I/O if available.
                     21:      Unlocked I/O can improve performance in unithreaded apps,
                     22:      but it is not safe for multithreaded apps.])
                     23: 
                     24:   dnl Persuade glibc and Solaris <stdio.h> to declare
                     25:   dnl fgets_unlocked(), fputs_unlocked() etc.
                     26:   AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
                     27: 
                     28:   AC_CHECK_DECLS_ONCE([clearerr_unlocked])
                     29:   AC_CHECK_DECLS_ONCE([feof_unlocked])
                     30:   AC_CHECK_DECLS_ONCE([ferror_unlocked])
                     31:   AC_CHECK_DECLS_ONCE([fflush_unlocked])
                     32:   AC_CHECK_DECLS_ONCE([fgets_unlocked])
                     33:   AC_CHECK_DECLS_ONCE([fputc_unlocked])
                     34:   AC_CHECK_DECLS_ONCE([fputs_unlocked])
                     35:   AC_CHECK_DECLS_ONCE([fread_unlocked])
                     36:   AC_CHECK_DECLS_ONCE([fwrite_unlocked])
                     37:   AC_CHECK_DECLS_ONCE([getc_unlocked])
                     38:   AC_CHECK_DECLS_ONCE([getchar_unlocked])
                     39:   AC_CHECK_DECLS_ONCE([putc_unlocked])
                     40:   AC_CHECK_DECLS_ONCE([putchar_unlocked])
                     41: ])