100 lines
2.8 KiB
Text
100 lines
2.8 KiB
Text
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# getdelim.m4 serial 15
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dnl Copyright (C) 2005-2007, 2009-2021 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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AC_DEFUN([gl_FUNC_GETDELIM],
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[
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AC_REQUIRE([gl_STDIO_H_DEFAULTS])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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dnl Persuade glibc <stdio.h> to declare getdelim().
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AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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AC_CHECK_DECLS_ONCE([getdelim])
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AC_CHECK_FUNCS_ONCE([getdelim])
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if test $ac_cv_func_getdelim = yes; then
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HAVE_GETDELIM=1
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dnl Found it in some library. Verify that it works.
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AC_CACHE_CHECK([for working getdelim function],
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[gl_cv_func_working_getdelim],
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[echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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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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{
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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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{
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/* Test result for a NULL buffer and a zero size.
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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 = getdelim (&line, &siz, '\n', in);
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if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
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{ free (line); fclose (in); return 2; }
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free (line);
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}
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{
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/* Test result for a NULL buffer and a non-zero size.
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This crashes on FreeBSD 8.0. */
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char *line = NULL;
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size_t siz = (size_t)(~0) / 4;
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if (getdelim (&line, &siz, '\n', in) == -1)
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{ fclose (in); return 3; }
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free (line);
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}
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fclose (in);
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return 0;
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}
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]])],
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[gl_cv_func_working_getdelim=yes],
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[gl_cv_func_working_getdelim=no],
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[dnl We're cross compiling.
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dnl Guess it works on glibc2 systems and musl 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) && !defined __UCLIBC__
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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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[gl_cv_func_working_getdelim="guessing yes"],
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[case "$host_os" in
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*-musl*) gl_cv_func_working_getdelim="guessing yes" ;;
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*) gl_cv_func_working_getdelim="$gl_cross_guess_normal" ;;
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esac
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])
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])
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])
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case "$gl_cv_func_working_getdelim" in
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*yes) ;;
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*) REPLACE_GETDELIM=1 ;;
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esac
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else
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HAVE_GETDELIM=0
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fi
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if test $ac_cv_have_decl_getdelim = no; then
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HAVE_DECL_GETDELIM=0
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fi
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])
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# Prerequisites of lib/getdelim.c.
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AC_DEFUN([gl_PREREQ_GETDELIM],
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[
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AC_CHECK_FUNCS([flockfile funlockfile])
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AC_CHECK_DECLS([getc_unlocked])
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])
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