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c17253b9 MF |
1 | # getdelim.m4 serial 15 |
2 | ||
3 | dnl Copyright (C) 2005-2007, 2009-2021 Free Software Foundation, Inc. | |
4 | dnl | |
5 | dnl This file is free software; the Free Software Foundation | |
6 | dnl gives unlimited permission to copy and/or distribute it, | |
7 | dnl with or without modifications, as long as this notice is preserved. | |
8 | ||
9 | AC_PREREQ([2.59]) | |
10 | ||
11 | AC_DEFUN([gl_FUNC_GETDELIM], | |
12 | [ | |
13 | AC_REQUIRE([gl_STDIO_H_DEFAULTS]) | |
14 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles | |
15 | ||
16 | dnl Persuade glibc <stdio.h> to declare getdelim(). | |
17 | AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS]) | |
18 | ||
19 | AC_CHECK_DECLS_ONCE([getdelim]) | |
20 | ||
21 | AC_CHECK_FUNCS_ONCE([getdelim]) | |
22 | if test $ac_cv_func_getdelim = yes; then | |
23 | HAVE_GETDELIM=1 | |
24 | dnl Found it in some library. Verify that it works. | |
25 | AC_CACHE_CHECK([for working getdelim function], | |
26 | [gl_cv_func_working_getdelim], | |
27 | [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data | |
28 | AC_RUN_IFELSE([AC_LANG_SOURCE([[ | |
29 | # include <stdio.h> | |
30 | # include <stdlib.h> | |
31 | # include <string.h> | |
32 | int main () | |
33 | { | |
34 | FILE *in = fopen ("./conftest.data", "r"); | |
35 | if (!in) | |
36 | return 1; | |
37 | { | |
38 | /* Test result for a NULL buffer and a zero size. | |
39 | Based on a test program from Karl Heuer. */ | |
40 | char *line = NULL; | |
41 | size_t siz = 0; | |
42 | int len = getdelim (&line, &siz, '\n', in); | |
43 | if (!(len == 4 && line && strcmp (line, "foo\n") == 0)) | |
44 | { free (line); fclose (in); return 2; } | |
45 | free (line); | |
46 | } | |
47 | { | |
48 | /* Test result for a NULL buffer and a non-zero size. | |
49 | This crashes on FreeBSD 8.0. */ | |
50 | char *line = NULL; | |
51 | size_t siz = (size_t)(~0) / 4; | |
52 | if (getdelim (&line, &siz, '\n', in) == -1) | |
53 | { fclose (in); return 3; } | |
54 | free (line); | |
55 | } | |
56 | fclose (in); | |
57 | return 0; | |
58 | } | |
59 | ]])], | |
60 | [gl_cv_func_working_getdelim=yes], | |
61 | [gl_cv_func_working_getdelim=no], | |
62 | [dnl We're cross compiling. | |
63 | dnl Guess it works on glibc2 systems and musl systems. | |
64 | AC_EGREP_CPP([Lucky GNU user], | |
65 | [ | |
66 | #include <features.h> | |
67 | #ifdef __GNU_LIBRARY__ | |
68 | #if (__GLIBC__ >= 2) && !defined __UCLIBC__ | |
69 | Lucky GNU user | |
70 | #endif | |
71 | #endif | |
72 | ], | |
73 | [gl_cv_func_working_getdelim="guessing yes"], | |
74 | [case "$host_os" in | |
75 | *-musl*) gl_cv_func_working_getdelim="guessing yes" ;; | |
76 | *) gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;; | |
77 | esac | |
78 | ]) | |
79 | ]) | |
80 | ]) | |
81 | case "$gl_cv_func_working_getdelim" in | |
82 | *yes) ;; | |
83 | *) REPLACE_GETDELIM=1 ;; | |
84 | esac | |
85 | else | |
86 | HAVE_GETDELIM=0 | |
87 | fi | |
88 | ||
89 | if test $ac_cv_have_decl_getdelim = no; then | |
90 | HAVE_DECL_GETDELIM=0 | |
91 | fi | |
92 | ]) | |
93 | ||
94 | # Prerequisites of lib/getdelim.c. | |
95 | AC_DEFUN([gl_PREREQ_GETDELIM], | |
96 | [ | |
97 | AC_CHECK_FUNCS([flockfile funlockfile]) | |
98 | AC_CHECK_DECLS([getc_unlocked]) | |
99 | ]) |