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annotate m4/getline.m4 @ 40158:383f7a766b7c

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test-framework-sh: Improve maintainability. * tests/init.sh: Clarify what belongs together. Reorder definitions.
author Bruno Haible <bruno@clisp.org>
date Sun, 27 Jan 2019 16:55:27 +0100
parents b06060465f09
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 # getline.m4 serial 28
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2
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3 dnl Copyright (C) 1998-2003, 2005-2007, 2009-2019 Free Software Foundation,
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4 dnl Inc.
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5 dnl
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6 dnl This file is free software; the Free Software Foundation
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7 dnl gives unlimited permission to copy and/or distribute it,
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8 dnl with or without modifications, as long as this notice is preserved.
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9
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10 AC_PREREQ([2.59])
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11
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12 dnl See if there's a working, system-supplied version of the getline function.
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13 dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
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14 dnl have a function by that name in -linet that doesn't have anything
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15 dnl to do with the function we need.
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16 AC_DEFUN([gl_FUNC_GETLINE],
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17 [
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18 AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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19
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20 dnl Persuade glibc <stdio.h> to declare getline().
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21 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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22
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23 AC_CHECK_DECLS_ONCE([getline])
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24
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25 gl_getline_needs_run_time_check=no
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26 AC_CHECK_FUNC([getline],
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27 [dnl Found it in some library. Verify that it works.
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28 gl_getline_needs_run_time_check=yes],
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29 [am_cv_func_working_getline=no])
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30 if test $gl_getline_needs_run_time_check = yes; then
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31 AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
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32 [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
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33 AC_RUN_IFELSE([AC_LANG_SOURCE([[
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34 # include <stdio.h>
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35 # include <stdlib.h>
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36 # include <string.h>
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37 int main ()
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38 {
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39 FILE *in = fopen ("./conftest.data", "r");
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40 if (!in)
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41 return 1;
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42 {
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43 /* Test result for a NULL buffer and a zero size.
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44 Based on a test program from Karl Heuer. */
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45 char *line = NULL;
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46 size_t siz = 0;
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47 int len = getline (&line, &siz, in);
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48 if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
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49 { free (line); fclose (in); return 2; }
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50 free (line);
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51 }
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52 {
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53 /* Test result for a NULL buffer and a non-zero size.
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54 This crashes on FreeBSD 8.0. */
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55 char *line = NULL;
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56 size_t siz = (size_t)(~0) / 4;
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57 if (getline (&line, &siz, in) == -1)
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58 { fclose (in); return 3; }
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59 free (line);
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60 }
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61 fclose (in);
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62 return 0;
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63 }
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64 ]])], [am_cv_func_working_getline=yes] dnl The library version works.
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65 , [am_cv_func_working_getline=no] dnl The library version does NOT work.
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66 , dnl We're cross compiling. Assume it works on glibc2 systems.
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67 [AC_EGREP_CPP([Lucky GNU user],
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68 [
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69 #include <features.h>
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70 #ifdef __GNU_LIBRARY__
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71 #if (__GLIBC__ >= 2) && !defined __UCLIBC__
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72 Lucky GNU user
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73 #endif
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74 #endif
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75 ],
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76 [am_cv_func_working_getline="guessing yes"],
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77 [am_cv_func_working_getline="guessing no"])]
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78 )])
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79 fi
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80
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81 if test $ac_cv_have_decl_getline = no; then
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82 HAVE_DECL_GETLINE=0
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83 fi
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84
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85 case "$am_cv_func_working_getline" in
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86 *no)
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87 dnl Set REPLACE_GETLINE always: Even if we have not found the broken
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88 dnl getline function among $LIBS, it may exist in libinet and the
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89 dnl executable may be linked with -linet.
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90 REPLACE_GETLINE=1
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91 ;;
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92 esac
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93 ])
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94
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95 # Prerequisites of lib/getline.c.
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96 AC_DEFUN([gl_PREREQ_GETLINE],
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97 [
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98 :
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99 ])