build: Fix setting configuration definitions

Variable in cache need to be explicitly unset else they will remain in
the cache and still be defined by #cmakedefine.

Signed-off-by: Dimitri Staessens <[email protected]>
Signed-off-by: Sander Vrijders <[email protected]>

2 files changed, 9 insertions, 2 deletions

diff --git a/src/ipcpd/shim-eth-llc/CMakeLists.txt b/src/ipcpd/shim-eth-llc/CMakeLists.txt
index e9c34bbd..c3e954f7 100644
--- a/src/ipcpd/shim-eth-llc/CMakeLists.txt
+++ b/src/ipcpd/shim-eth-llc/CMakeLists.txt
@@ -28,6 +28,8 @@ if (CMAKE_SYSTEM_NAME STREQUAL "Linux")
     set(HAVE_LLC TRUE)
   else ()
     message(STATUS "Raw socket support for shim-eth-llc disabled by user")
+    unset(HAVE_RAW_SOCKETS)
+    unset(HAVE_LLC)
   endif ()
 endif ()
 
@@ -50,6 +52,8 @@ if (NOT CMAKE_SYSTEM_NAME STREQUAL "Linux")
     else ()
       message(STATUS "Berkeley Packet Filter support "
                      "for shim-eth-llc disabled by user")
+      unset(HAVE_BPF)
+      unset(HAVE_LLC)
     endif ()
   endif ()
 endif ()
@@ -64,6 +68,8 @@ if (NETMAP_C_INCLUDE_DIR)
     set(HAVE_LLC TRUE)
   else ()
     message(STATUS "Netmap support for shim-eth-llc disabled by user")
+    unset(HAVE_NETMAP)
+    unset(HAVE_LLC)
   endif ()
 endif ()
 
diff --git a/src/ipcpd/shim-udp/CMakeLists.txt b/src/ipcpd/shim-udp/CMakeLists.txt
index 2bc68154..0319e63d 100644
--- a/src/ipcpd/shim-udp/CMakeLists.txt
+++ b/src/ipcpd/shim-udp/CMakeLists.txt
@@ -43,9 +43,10 @@ if (NSLOOKUP_EXECUTABLE AND NSUPDATE_EXECUTABLE)
   if (NOT DISABLE_DNS)
     message(STATUS "DDNS support enabled")
     set(HAVE_DDNS TRUE CACHE INTERNAL "")
- else ()
+  else ()
     message(STATUS "DDNS support disabled by user")
- endif ()
+    unset(HAVE_DDNS CACHE)
+  endif ()
 else ()
   if (NSLOOKUP_EXECUTABLE)
     message(STATUS "Install nsupdate to enable DDNS support")