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comparison m4/ptsname_r.m4 @ 40140:81f075eaa990

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ptsname_r: Work around bug on Android 4.3. * m4/ptsname_r.m4 (gl_FUNC_PTSNAME_R): Define HAVE_ESSENTIALLY_WORKING_PTSNAME_R. Test whether the return value is correct. * lib/ptsname_r.c (__ptsname_r): If HAVE_ESSENTIALLY_WORKING_PTSNAME_R is defined, just fix the return value. * doc/glibc-functions/ptsname_r.texi: Mention the Android bug. Reword: The behaviour of musl libc is nothing to be "fixed", since it is compliant with the next POSIX standard.
author Bruno Haible <bruno@clisp.org>
date Sat, 26 Jan 2019 15:23:19 +0100
parents b06060465f09
children
comparison
equal deleted inserted replaced
40139:3bacbf659cc9 40140:81f075eaa990
1 # ptsname_r.m4 serial 5 1 # ptsname_r.m4 serial 6
2 dnl Copyright (C) 2010-2019 Free Software Foundation, Inc. 2 dnl Copyright (C) 2010-2019 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation 3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it, 4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved. 5 dnl with or without modifications, as long as this notice is preserved.
6 6
38 [gl_cv_func_ptsname_r_signature_ok=yes], 38 [gl_cv_func_ptsname_r_signature_ok=yes],
39 [gl_cv_func_ptsname_r_signature_ok=no]) 39 [gl_cv_func_ptsname_r_signature_ok=no])
40 ]) 40 ])
41 if test $gl_cv_func_ptsname_r_signature_ok = no; then 41 if test $gl_cv_func_ptsname_r_signature_ok = no; then
42 REPLACE_PTSNAME_R=1 42 REPLACE_PTSNAME_R=1
43 else
44 AC_DEFINE([HAVE_ESSENTIALLY_WORKING_PTSNAME_R], [1],
45 [Define to 1 if ptsname_r() is essentially working.])
46 dnl On Android 4.3, when ptsname_r fails, it returns -1 instead of the
47 dnl error code.
48 AC_REQUIRE([AC_CANONICAL_HOST])
49 AC_CACHE_CHECK([whether ptsname_r returns an error code],
50 [gl_cv_func_ptsname_r_retval_ok],
51 [AC_RUN_IFELSE(
52 [AC_LANG_SOURCE([[
53 #include <stdlib.h>
54 int
55 main (void)
56 {
57 char buf[80];
58 return ptsname_r (-1, buf, sizeof buf) == -1;
59 }]])],
60 [gl_cv_func_ptsname_r_retval_ok=yes],
61 [gl_cv_func_ptsname_r_retval_ok=no],
62 [case "$host_os" in
63 dnl Guess no on Android.
64 linux*-android*) gl_cv_func_ptsname_r_retval_ok="guessing no" ;;
65 dnl Guess yes otherwise.
66 *) gl_cv_func_ptsname_r_retval_ok="guessing yes" ;;
67 esac
68 ])
69 ])
70 case "$gl_cv_func_ptsname_r_retval_ok" in
71 *yes) ;;
72 *) REPLACE_PTSNAME_R=1 ;;
73 esac
43 fi 74 fi
44 fi 75 fi
45 76
46 AC_REQUIRE([AC_HEADER_MAJOR]) 77 AC_REQUIRE([AC_HEADER_MAJOR])
47 ]) 78 ])