1 files changed, 90 insertions, 0 deletions
diff --git a/m4/getdelim.m4 b/m4/getdelim.m4
new file mode 100644
index 0000000..bf17c57
--- /dev/null
+++ b/m4/getdelim.m4
@@ -0,0 +1,90 @@
+# getdelim.m4 serial 12
+
+dnl Copyright (C) 2005-2007, 2009-2019 Free Software Foundation, 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])
+
+AC_DEFUN([gl_FUNC_GETDELIM],
+[
+  AC_REQUIRE([gl_STDIO_H_DEFAULTS])
+
+  dnl Persuade glibc <stdio.h> to declare getdelim().
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_CHECK_DECLS_ONCE([getdelim])
+
+  AC_CHECK_FUNCS_ONCE([getdelim])
+  if test $ac_cv_func_getdelim = yes; then
+    HAVE_GETDELIM=1
+    dnl Found it in some library.  Verify that it works.
+    AC_CACHE_CHECK([for working getdelim function], [gl_cv_func_working_getdelim],
+    [echo fooNbarN | tr -d '\012' | tr N '\012' > conftest.data
+    AC_RUN_IFELSE([AC_LANG_SOURCE([[
+#    include <stdio.h>
+#    include <stdlib.h>
+#    include <string.h>
+    int main ()
+    {
+      FILE *in = fopen ("./conftest.data", "r");
+      if (!in)
+        return 1;
+      {
+        /* Test result for a NULL buffer and a zero size.
+           Based on a test program from Karl Heuer.  */
+        char *line = NULL;
+        size_t siz = 0;
+        int len = getdelim (&line, &siz, '\n', in);
+        if (!(len == 4 && line && strcmp (line, "foo\n") == 0))
+          { free (line); fclose (in); return 2; }
+      }
+      {
+        /* Test result for a NULL buffer and a non-zero size.
+           This crashes on FreeBSD 8.0.  */
+        char *line = NULL;
+        size_t siz = (size_t)(~0) / 4;
+        if (getdelim (&line, &siz, '\n', in) == -1)
+          { fclose (in); return 3; }
+        free (line);
+      }
+      fclose (in);
+      return 0;
+    }
+    ]])], [gl_cv_func_working_getdelim=yes] dnl The library version works.
+    , [gl_cv_func_working_getdelim=no] dnl The library version does NOT work.
+    , dnl We're cross compiling. Assume it works on glibc2 systems.
+      [AC_EGREP_CPP([Lucky GNU user],
+         [
+#include <features.h>
+#ifdef __GNU_LIBRARY__
+ #if (__GLIBC__ >= 2) && !defined __UCLIBC__
+  Lucky GNU user
+ #endif
+#endif
+         ],
+         [gl_cv_func_working_getdelim="guessing yes"],
+         [gl_cv_func_working_getdelim="guessing no"])]
+    )])
+    case "$gl_cv_func_working_getdelim" in
+      *no)
+        REPLACE_GETDELIM=1
+        ;;
+    esac
+  else
+    HAVE_GETDELIM=0
+  fi
+
+  if test $ac_cv_have_decl_getdelim = no; then
+    HAVE_DECL_GETDELIM=0
+  fi
+])
+
+# Prerequisites of lib/getdelim.c.
+AC_DEFUN([gl_PREREQ_GETDELIM],
+[
+  AC_CHECK_FUNCS([flockfile funlockfile])
+  AC_CHECK_DECLS([getc_unlocked])
+])