1 files changed, 51 insertions, 0 deletions
diff --git a/m4/strtoull.m4 b/m4/strtoull.m4
new file mode 100644
index 0000000..8c8e30c
--- /dev/null
+++ b/m4/strtoull.m4
@@ -0,0 +1,51 @@
+# strtoull.m4 serial 9
+dnl Copyright (C) 2002, 2004, 2006, 2008-2022 Free Software Foundation, Inc.
+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_DEFUN([gl_FUNC_STRTOULL],
+[
+  AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+  AC_REQUIRE([AC_CANONICAL_HOST])
+  AC_CHECK_FUNCS([strtoull])
+  if test $ac_cv_func_strtoull = yes; then
+    AC_CACHE_CHECK([whether strtoull works],
+      [gl_cv_func_strtoull_works],
+      [AC_RUN_IFELSE(
+         [AC_LANG_PROGRAM(
+            [[#include <stdlib.h>]],
+            [[int result = 0;
+              char *term;
+              /* This test fails on Minix and native Windows.  */
+              {
+                const char input[] = "0x";
+                (void) strtoull (input, &term, 16);
+                if (term != input + 1)
+                  result |= 1;
+              }
+              return result;
+            ]])
+         ],
+         [gl_cv_func_strtoull_works=yes],
+         [gl_cv_func_strtoull_works=no],
+         [case "$host_os" in
+                    # Guess no on native Windows.
+            mingw*) gl_cv_func_strtoull_works="guessing no" ;;
+            *)      gl_cv_func_strtoull_works="$gl_cross_guess_normal" ;;
+          esac
+         ])
+    ])
+    case "$gl_cv_func_strtoull_works" in
+      *yes) ;;
+      *)    REPLACE_STRTOULL=1 ;;
+    esac
+  else
+    HAVE_STRTOULL=0
+  fi
+])
+
+# Prerequisites of lib/strtoull.c.
+AC_DEFUN([gl_PREREQ_STRTOULL], [
+  :
+])