From 11beee855e29757a07320fd60e85de2e8da4e037 Mon Sep 17 00:00:00 2001
From: Werner Lemberg <wl@gnu.org>
Date: Wed, 8 Apr 2020 09:05:32 +0200
Subject: [PATCH] Allow setting `CC' in Unix build (#58051).

* builds/unix/unix-cc.in (CC): Use `override'.  The command line
  value of `CC' (if any) is stored already in `CCraw'.
---
 ChangeLog              | 7 +++++++
 builds/unix/unix-cc.in | 8 ++++++--
 2 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index a3a84ef25..f1ca56a85 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2020-04-08  Werner Lemberg  <wl@gnu.org>
+
+	Allow setting `CC' in Unix build (#58051).
+
+	* builds/unix/unix-cc.in (CC): Use `override'.  The command line
+	  value of `CC' (if any) is stored already in `CCraw'.
+
 2020-04-04  Nikhil Ramakrishnan  <ramakrishnan.nikhil@gmail.com>
 
 	[woff2] Return if single stream operation fails.
diff --git a/builds/unix/unix-cc.in b/builds/unix/unix-cc.in
index 42e5e8df0..470ac23d8 100644
--- a/builds/unix/unix-cc.in
+++ b/builds/unix/unix-cc.in
@@ -87,8 +87,12 @@ ANSIFLAGS := @XX_ANSIFLAGS@
 
 # C compiler to use -- we use libtool!
 #
-CCraw := $(CC)
-CC    := $(LIBTOOL) --mode=compile $(CCraw)
+# CC might be set on the command line; we store this value in `CCraw'.
+# Consequently, we use the `override' directive to ensure that the
+# libtool call is always prepended.
+#
+CCraw       := $(CC)
+override CC := $(LIBTOOL) --mode=compile $(CCraw)
 
 # Resource compiler to use on Cygwin/MinGW, usually windres.
 #