Fix #152, adjust subscription table based on apps present

Create an inclusion preprocessor macro for each app referred to in the
subscription table, and only include that line if the app is present in
the current configuration.

In particular, do not assume that sample_app will always be there.

CMakeLists.txt

@@ -1,13 +1,20 @@
 cmake_minimum_required(VERSION 3.5)
 project(CFS_TO_LAB C)
 
+set(TO_TABLE_COMPILE_DEFS)
+
 # These references are specifically needed for the table build
 # it is easiest to add them as directory properties so they won't
-# be considered include directories for TO_LAB itself.
-include_directories(
-    $<TARGET_PROPERTY:ci_lab,INTERFACE_INCLUDE_DIRECTORIES>
-    $<TARGET_PROPERTY:sample_app,INTERFACE_INCLUDE_DIRECTORIES>
-)
+# be considered include directories for TO_LAB itself.  Each one
+# gets a macro for conditional inclusion in the subscription table.
+foreach(EXT_APP ci_lab sample_app hs fm ds sc lc)
+  list (FIND TGTSYS_${SYSVAR}_APPS ${EXT_APP} HAVE_APP)
+  if (HAVE_APP GREATER_EQUAL 0)
+    include_directories($<TARGET_PROPERTY:${EXT_APP},INTERFACE_INCLUDE_DIRECTORIES>)
+    string(TOUPPER "HAVE_${EXT_APP}" APP_MACRO)
+    add_definitions(-D${APP_MACRO})
+  endif()
+endforeach()
 
 set(APP_SRC_FILES
     fsw/src/to_lab_app.c

fsw/tables/to_lab_sub.c

@@ -28,37 +28,39 @@
 /*
 ** Add the proper include file for the message IDs below
 */
-
-/*
-** Common CFS app includes below are commented out
-*/
 #include "to_lab_msgids.h"
+
+#ifdef HAVE_CI_LAB
 #include "ci_lab_msgids.h"
+#endif
 
+#ifdef HAVE_SAMPLE_APP
 #include "sample_app_msgids.h"
+#endif
 
-#if 0
+#ifdef HAVE_HS_APP
 #include "hs_msgids.h"
+#endif
+
+#ifdef HAVE_FM_APP
 #include "fm_msgids.h"
+#endif
+
+#ifdef HAVE_SC_APP
 #include "sc_msgids.h"
+#endif
+
+#ifdef HAVE_DS_APP
 #include "ds_msgids.h"
+#endif
+
+#ifdef HAVE_LC_APP
 #include "lc_msgids.h"
 #endif
 
 TO_LAB_Subs_t TO_LAB_Subs = {.Subs = {/* CFS App Subscriptions */
                                       {CFE_SB_MSGID_WRAP_VALUE(TO_LAB_HK_TLM_MID), {0, 0}, 4},
                                       {CFE_SB_MSGID_WRAP_VALUE(TO_LAB_DATA_TYPES_MID), {0, 0}, 4},
-                                      {CFE_SB_MSGID_WRAP_VALUE(CI_LAB_HK_TLM_MID), {0, 0}, 4},
-                                      {CFE_SB_MSGID_WRAP_VALUE(SAMPLE_APP_HK_TLM_MID), {0, 0}, 4},
-
-#if 0
-        /* Add these if needed */
-        {CFE_SB_MSGID_WRAP_VALUE(HS_HK_TLM_MID), {0,0}, 4},
-        {CFE_SB_MSGID_WRAP_VALUE(FM_HK_TLM_MID), {0,0}, 4},
-        {CFE_SB_MSGID_WRAP_VALUE(SC_HK_TLM_MID), {0,0}, 4},
-        {CFE_SB_MSGID_WRAP_VALUE(DS_HK_TLM_MID), {0,0}, 4},
-        {CFE_SB_MSGID_WRAP_VALUE(LC_HK_TLM_MID), {0,0}, 4},
-#endif
 
                                       /* cFE Core subscriptions */
                                       {CFE_SB_MSGID_WRAP_VALUE(CFE_ES_HK_TLM_MID), {0, 0}, 4},
@@ -74,6 +76,28 @@ TO_LAB_Subs_t TO_LAB_Subs = {.Subs = {/* CFS App Subscriptions */
                                       {CFE_SB_MSGID_WRAP_VALUE(CFE_ES_APP_TLM_MID), {0, 0}, 4},
                                       {CFE_SB_MSGID_WRAP_VALUE(CFE_ES_MEMSTATS_TLM_MID), {0, 0}, 4},
 
+#ifdef HAVE_CI_LAB
+                                      {CFE_SB_MSGID_WRAP_VALUE(CI_LAB_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_SAMPLE_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(SAMPLE_APP_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_HS_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(HS_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_HS_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(FM_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_HS_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(SC_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_HS_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(DS_HK_TLM_MID), {0, 0}, 4},
+#endif
+#ifdef HAVE_HS_APP
+                                      {CFE_SB_MSGID_WRAP_VALUE(LC_HK_TLM_MID), {0, 0}, 4},
+#endif
+
                                       /* CFE_SB_MSGID_RESERVED entry to mark the end of valid MsgIds */
                                       {CFE_SB_MSGID_RESERVED, {0, 0}, 0}}};