3
dnl Copyright (C) 1998-2003, 2005-2007, 2009-2010 Free Software Foundation,
6
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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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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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 fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
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AC_RUN_IFELSE([AC_LANG_SOURCE([[
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FILE *in = fopen ("./conftest.data", "r");
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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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int len = getline (&line, &siz, in);
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if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
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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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size_t siz = (size_t)(~0) / 4;
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if (getline (&line, &siz, in) == -1)
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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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#ifdef __GNU_LIBRARY__
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[am_cv_func_working_getline=yes],
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[am_cv_func_working_getline=no])]
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if test $ac_cv_have_decl_getline = no; then
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if test $am_cv_func_working_getline = no; then
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dnl Set REPLACE_GETLINE always: Even if we have not found the broken
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dnl getline function among $LIBS, it may exist in libinet and the
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dnl executable may be linked with -linet.
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# Prerequisites of lib/getline.c.
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AC_DEFUN([gl_PREREQ_GETLINE],