bitbang: Fix FTBFS with GCC 10

GCC 10 defaults to -fno-common which breaks the sharing of bitbang_swd
struct between bitbang drivers due to a missing extern.

Change-Id: I2b4122f7939cec91a72284006748f99a23548324
Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>
Reviewed-on: http://openocd.zylin.com/5592
Tested-by: jenkins
Reviewed-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-by: Jonathan McDowell <noodles-openocd@earth.li>

diff --git a/src/jtag/drivers/bitbang.h b/src/jtag/drivers/bitbang.h
index edb779cad9409bde4d308ec3b718ef5e3b53db7c..bbbc693df5634fcffca85a33950b619937a4f17c 100644 (file)
--- a/src/jtag/drivers/bitbang.h
+++ b/src/jtag/drivers/bitbang.h
@@ -56,7 +56,7 @@ struct bitbang_interface {
        void (*swdio_drive)(bool on);
 };
 
-const struct swd_driver bitbang_swd;
+extern const struct swd_driver bitbang_swd;
 
 extern bool swd_mode;