Add extern to *_main global variable declarations in header files.

- Global variables declared in header files without
  the use of the 'extern' keword will result in multiple
  instances of the variable to be created by the compiler
  -- one for each different source file in which the
  the header file is included.  This results in wasted
  memory allocated in the BSS segments as well as
  potentially introducing bugs in the application.

Change-Id: I6ef1790b60a0bd9dd3994f8510723decf258b0cc
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

2 files changed, 3 insertions, 1 deletions

diff --git a/src/plugins/dpdk/ipsec/ipsec.c b/src/plugins/dpdk/ipsec/ipsec.c
index 4bae8c1b0f4..6aa5fae8b26 100644
--- a/src/plugins/dpdk/ipsec/ipsec.c
+++ b/src/plugins/dpdk/ipsec/ipsec.c
@@ -21,6 +21,8 @@
 #include <dpdk/device/dpdk.h>
 #include <dpdk/ipsec/ipsec.h>
 
+dpdk_crypto_main_t dpdk_crypto_main;
+
 #define EMPTY_STRUCT {0}
 
 static void
diff --git a/src/plugins/dpdk/ipsec/ipsec.h b/src/plugins/dpdk/ipsec/ipsec.h
index 98e5ad53acb..22890628ec6 100644
--- a/src/plugins/dpdk/ipsec/ipsec.h
+++ b/src/plugins/dpdk/ipsec/ipsec.h
@@ -144,7 +144,7 @@ typedef struct
   u8 enabled;
 } dpdk_crypto_main_t;
 
-dpdk_crypto_main_t dpdk_crypto_main;
+extern dpdk_crypto_main_t dpdk_crypto_main;
 
 static const u8 pad_data[] =
   { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 0 };