From 156e745be9f6a1b19b0f8e2a931148786d7acad4 Mon Sep 17 00:00:00 2001
From: Dan Cross <cross@gajendra.net>
Date: Wed, 23 Jul 2025 06:47:21 -0400
Subject: all: remove need for `-fcommon`

Use `extern` where appropriate so that we can remove `-fcommon`
on macOS and others.  On macOS, `-fcommon` generates a number of
linker warnings.

I've tested building on macOS, Linux, FreeBSD, NetBSD, OpenBSD
and illumos.  I am not in a position to test on AIX or other
more esoteric platforms, however.
---
 bin/9c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

(limited to 'bin')

diff --git a/bin/9c b/bin/9c
index 195fec81..656ba84d 100755
--- a/bin/9c
+++ b/bin/9c
@@ -23,7 +23,7 @@ usegcc()
 		-Wno-deprecated-declarations \
 		-fno-omit-frame-pointer \
 		-fsigned-char \
-		-fcommon \
+		-fno-common \
 		-std=gnu11 \
 	"
 	# want to put -fno-optimize-sibling-calls here but
@@ -85,7 +85,7 @@ useclang()
 		-Wno-unused-but-set-variable \
 		-fsigned-char \
 		-fno-caret-diagnostics \
-		-fcommon \
+		-fno-common \
 	"
 	cflags="$cflags -g"
 	cflags="$cflags $CC9FLAGS"
-- 
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