From 4c8c9935eb23bfbabf311ad2e27498227f4ee932 Mon Sep 17 00:00:00 2001
From: Tyler Steele <tsteele@openjdk.org>
Date: Mon, 20 Mar 2023 17:13:35 +0000
Subject: [PATCH] 8304364: [AIX] Build erroneously determines build disk is
 non-local when using GNU-utils df on AIX

Reviewed-by: erikj
---
 make/autoconf/basic.m4 | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/make/autoconf/basic.m4 b/make/autoconf/basic.m4
index 7e8c7bb8bed..2ec792f78b4 100644
--- a/make/autoconf/basic.m4
+++ b/make/autoconf/basic.m4
@@ -477,7 +477,11 @@ AC_DEFUN([BASIC_CHECK_DIR_ON_LOCAL_DISK],
     # df on AIX does not understand -l. On modern AIXes it understands "-T local" which
     # is the same. On older AIXes we just continue to live with a "not local build" warning.
     if test "x$OPENJDK_TARGET_OS" = xaix; then
-      DF_LOCAL_ONLY_OPTION='-T local'
+      if "$DF -T local > /dev/null 2>&1"; then
+        DF_LOCAL_ONLY_OPTION='-T local'
+      else # AIX may use GNU-utils instead
+        DF_LOCAL_ONLY_OPTION='-l'
+      fi
     elif test "x$OPENJDK_BUILD_OS_ENV" = "xwindows.wsl1"; then
       # In WSL1, we can only build on a drvfs file system (that is, a mounted real Windows drive)
       DF_LOCAL_ONLY_OPTION='-t drvfs'