From 02153cb0b2d1083dcd587798d9ef7ce963739622 Mon Sep 17 00:00:00 2001
From: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Date: Wed, 19 Aug 2020 18:46:17 +0200
Subject: [PATCH] dump1090.h: fix build with gcc 10

Fix the following build failures on gcc 10 (where -fno-common is enabled
by default):

/home/test/autobuild/run/instance-0/output-1/per-package/dump1090/host/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: interactive.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:373: multiple definition of `Modes'; /home/test/autobuild/run/instance-0/output-1/per-package/dump1090/host/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: interactive.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:373: multiple definition of `Modes'; dump1090.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:373: first defined here

/home/test/autobuild/run/instance-0/output-1/per-package/dump1090/host/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: interactive.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:238: multiple definition of `tDF'; dump1090.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:238: first defined here
/home/test/autobuild/run/instance-0/output-1/per-package/dump1090/host/bin/../lib/gcc/arm-buildroot-linux-gnueabihf/10.2.0/../../../../arm-buildroot-linux-gnueabihf/bin/ld: view1090.o:/home/test/autobuild/run/instance-0/output-1/build/dump1090-bff92c4ad772a0a8d433f788d39dae97e00e4dbe/dump1090.h:373: first defined here

Fixes:
 - http://autobuild.buildroot.org/results/88dc97fcaa649014edb3b54a5dd4bd8ec4715bbd

Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
[Upstream status: https://github.com/MalcolmRobb/dump1090/pull/96]
---
 dump1090.c | 3 +++
 dump1090.h | 4 ++--
 view1090.c | 3 +++
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/dump1090.c b/dump1090.c
index 60882fc..1482224 100644
--- a/dump1090.c
+++ b/dump1090.c
@@ -29,6 +29,9 @@
 //
 #include "coaa.h"
 #include "dump1090.h"
+
+struct modes Modes;
+
 //
 // ============================= Utility functions ==========================
 //
diff --git a/dump1090.h b/dump1090.h
index 9ad4de0..283e760 100644
--- a/dump1090.h
+++ b/dump1090.h
@@ -235,10 +235,10 @@ struct stDF {
     uint64_t         llTimestamp;                // Timestamp at which the this packet was received
     uint32_t         addr;                       // Timestamp at which the this packet was received
     unsigned char    msg[MODES_LONG_MSG_BYTES];  // the binary
-} tDF;
+};
 
 // Program global state
-struct {                             // Internal state
+extern struct modes {                             // Internal state
     pthread_t       reader_thread;
 
     pthread_mutex_t data_mutex;      // Mutex to synchronize buffer access
diff --git a/view1090.c b/view1090.c
index 0b9b8b9..cc072fc 100644
--- a/view1090.c
+++ b/view1090.c
@@ -29,6 +29,9 @@
 //
 #include "coaa.h"
 #include "view1090.h"
+
+struct modes Modes;
+
 //
 // ============================= Utility functions ==========================
 //
-- 
2.27.0