mirror of https://github.com/moparisthebest/wget
81 lines
2.3 KiB
Plaintext
81 lines
2.3 KiB
Plaintext
# getline.m4 serial 19
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dnl Copyright (C) 1998-2003, 2005-2007, 2009 Free Software Foundation, Inc.
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dnl
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_PREREQ([2.59])
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dnl See if there's a working, system-supplied version of the getline function.
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dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
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dnl have a function by that name in -linet that doesn't have anything
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dnl to do with the function we need.
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AC_DEFUN([gl_FUNC_GETLINE],
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[
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AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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dnl Persuade glibc <stdio.h> to declare getline().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_DECLS_ONCE([getline])
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gl_getline_needs_run_time_check=no
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AC_CHECK_FUNC([getline],
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dnl Found it in some library. Verify that it works.
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gl_getline_needs_run_time_check=yes,
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am_cv_func_working_getline=no)
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if test $gl_getline_needs_run_time_check = yes; then
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AC_CACHE_CHECK([for working getline function], [am_cv_func_working_getline],
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[echo fooN |tr -d '\012'|tr N '\012' > conftest.data
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AC_TRY_RUN([
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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int main ()
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{ /* Based on a test program from Karl Heuer. */
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char *line = NULL;
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size_t siz = 0;
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int len;
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FILE *in = fopen ("./conftest.data", "r");
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if (!in)
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return 1;
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len = getline (&line, &siz, in);
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exit ((len == 4 && line && strcmp (line, "foo\n") == 0) ? 0 : 1);
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}
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], am_cv_func_working_getline=yes dnl The library version works.
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, am_cv_func_working_getline=no dnl The library version does NOT work.
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, dnl We're cross compiling. Assume it works on glibc2 systems.
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[AC_EGREP_CPP([Lucky GNU user],
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[
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#include <features.h>
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#ifdef __GNU_LIBRARY__
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#if (__GLIBC__ >= 2)
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Lucky GNU user
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#endif
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#endif
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],
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[am_cv_func_working_getline=yes],
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[am_cv_func_working_getline=no])]
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)])
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fi
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if test $ac_cv_have_decl_getline = no; then
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HAVE_DECL_GETLINE=0
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fi
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if test $am_cv_func_working_getline = no; then
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REPLACE_GETLINE=1
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AC_LIBOBJ([getline])
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gl_PREREQ_GETLINE
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fi
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])
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# Prerequisites of lib/getline.c.
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AC_DEFUN([gl_PREREQ_GETLINE],
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[
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gl_FUNC_GETDELIM
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])
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