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-rw-r--r--m4/getline.m4109
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diff --git a/m4/getline.m4 b/m4/getline.m4
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+# getline.m4 serial 30
+
+dnl Copyright (C) 1998-2003, 2005-2007, 2009-2022 Free Software Foundation,
+dnl Inc.
+dnl
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_PREREQ([2.59])
+
+dnl See if there's a working, system-supplied version of the getline function.
+dnl We can't just do AC_REPLACE_FUNCS([getline]) because some systems
+dnl have a function by that name in -linet that doesn't have anything
+dnl to do with the function we need.
+AC_DEFUN([gl_FUNC_GETLINE],
+[
+ AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+
+ dnl Persuade glibc <stdio.h> to declare getline().
+ AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_DECLS_ONCE([getline])
+
+ gl_getline_needs_run_time_check=no
+ AC_CHECK_FUNC([getline],
+ [dnl Found it in some library. Verify that it works.
+ gl_getline_needs_run_time_check=yes],
+ [am_cv_func_working_getline=no])
+ if test $gl_getline_needs_run_time_check = yes; then
+ AC_CACHE_CHECK([for working getline function],
+ [am_cv_func_working_getline],
+ [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+ AC_RUN_IFELSE([AC_LANG_SOURCE([[
+# include <stdio.h>
+# include <stdlib.h>
+# include <string.h>
+ int main ()
+ {
+ FILE *in = fopen ("./conftest.data", "r");
+ if (!in)
+ return 1;
+ {
+ /* Test result for a NULL buffer and a zero size.
+ Based on a test program from Karl Heuer. */
+ char *line = NULL;
+ size_t siz = 0;
+ int len = getline (&line, &siz, in);
+ if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
+ { free (line); fclose (in); return 2; }
+ free (line);
+ }
+ {
+ /* Test result for a NULL buffer and a non-zero size.
+ This crashes on FreeBSD 8.0. */
+ char *line = NULL;
+ size_t siz = (size_t)(~0) / 4;
+ if (getline (&line, &siz, in) == -1)
+ { fclose (in); return 3; }
+ free (line);
+ }
+ fclose (in);
+ return 0;
+ }
+ ]])],
+ [am_cv_func_working_getline=yes],
+ [am_cv_func_working_getline=no],
+ [dnl We're cross compiling.
+ dnl Guess it works on glibc2 systems and musl systems.
+ AC_EGREP_CPP([Lucky GNU user],
+ [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2) && !defined __UCLIBC__
+ Lucky GNU user
+ #endif
+#endif
+ ],
+ [am_cv_func_working_getline="guessing yes"],
+ [case "$host_os" in
+ *-musl*) am_cv_func_working_getline="guessing yes" ;;
+ *) am_cv_func_working_getline="$gl_cross_guess_normal" ;;
+ esac
+ ])
+ ])
+ ])
+ fi
+
+ if test $ac_cv_have_decl_getline = no; then
+ HAVE_DECL_GETLINE=0
+ fi
+
+ case "$am_cv_func_working_getline" in
+ *yes) ;;
+ *)
+ dnl Set REPLACE_GETLINE always: Even if we have not found the broken
+ dnl getline function among $LIBS, it may exist in libinet and the
+ dnl executable may be linked with -linet.
+ REPLACE_GETLINE=1
+ ;;
+ esac
+])
+
+# Prerequisites of lib/getline.c.
+AC_DEFUN([gl_PREREQ_GETLINE],
+[
+ :
+])