From 52917b368fe204d0670f020d5f0f3ad9ec236e01 Mon Sep 17 00:00:00 2001
From: Tony Cook <tony@develop-help.com>
Date: Mon, 14 Nov 2022 11:20:15 +1100
Subject: configure.gnu forwards extra arguments to Configure

except when it doesn't (the -- arguments)

This came up during discussion of #20502, but is not a fix for it.
---
 INSTALL | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'INSTALL')

diff --git a/INSTALL b/INSTALL
index 2549148b32..af9d89fb25 100644
--- a/INSTALL
+++ b/INSTALL
@@ -1286,6 +1286,13 @@ options.  Try
 
 for a listing.
 
+Unrecognized arguments with a double dash prefix produce an error.
+
+Any other arguments are passed through to C<Configure>, so you could
+build a threaded perl with:
+
+        CC=gcc ./configure.gnu -Dusethreads
+
 (The file is called configure.gnu to avoid problems on systems
 that would not distinguish the files "Configure" and "configure".)
 
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