From 14bfba54a7633ca504c0dadc53cca37a4d2222a2 Mon Sep 17 00:00:00 2001
From: Harald Welte <laforge@osmocom.org>
Date: Wed, 29 Dec 2021 23:41:35 +0100
Subject: [PATCH] fix compilation with modern gcc-11

This addresses missing 'extern'' declarations in header filesr

/usr/bin/ld: lmsim.o:/space/home/laforge/projects/git/linmodem/v34priv.h:179: multiple definition of `trellis_trans_16'; lm.o:/space/home/laforge/projects/git/linmodem/v34priv.h:179: first defined here
---
 v34priv.h | 6 +++---
 v90priv.h | 4 ++--
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/v34priv.h b/v34priv.h
index 1c11e41..ca1a638 100644
--- a/v34priv.h
+++ b/v34priv.h
@@ -174,9 +174,9 @@ typedef struct V34DSPState {
     int JP_received;
 } V34DSPState;
 
-u8 trellis_trans_4[256][4];
-u8 trellis_trans_8[256][4];
-u8 trellis_trans_16[256][4];
+extern u8 trellis_trans_4[256][4];
+extern u8 trellis_trans_8[256][4];
+extern u8 trellis_trans_16[256][4];
 
 /* V34 states */
 enum {
diff --git a/v90priv.h b/v90priv.h
index c0e81f8..f99fbf8 100644
--- a/v90priv.h
+++ b/v90priv.h
@@ -38,8 +38,8 @@ typedef struct V90EncodeState {
     const s16 *ucode_to_linear;    /* table to retrieve the linear values from ucodes */
 } V90EncodeState;
 
-const s16 v90_ulaw_ucode_to_linear[128];
-const s16 v90_alaw_ucode_to_linear[128];
+extern const s16 v90_ulaw_ucode_to_linear[128];
+extern const s16 v90_alaw_ucode_to_linear[128];
 
 typedef struct V90DecodeState {
     struct sm_state *sm;