cmake: Add 3rd party public include directories

Add the possibility to distinguish between public and
non-public include directories. Public directories are
the one to use to access definitions of 3rd party code
interfaces.

Signed-off-by: Ronald Cron <ronald.cron@arm.com>

3rdparty/CMakeLists.txt

@@ -1,5 +1,6 @@
 list (APPEND thirdparty_src)
 list (APPEND thirdparty_lib)
+list (APPEND thirdparty_inc_public)
 list (APPEND thirdparty_inc)
 list (APPEND thirdparty_def)
 
@@ -11,5 +12,6 @@ endif()
 
 set(thirdparty_src ${thirdparty_src} PARENT_SCOPE)
 set(thirdparty_lib ${thirdparty_lib} PARENT_SCOPE)
+set(thirdparty_inc_public ${thirdparty_inc_public} PARENT_SCOPE)
 set(thirdparty_inc ${thirdparty_inc} PARENT_SCOPE)
 set(thirdparty_def ${thirdparty_def} PARENT_SCOPE)

3rdparty/everest/CMakeLists.txt

@@ -1,4 +1,5 @@
 list (APPEND everest_src)
+list (APPEND everest_inc_public)
 list (APPEND everest_inc)
 list (APPEND everest_def)
 
@@ -8,7 +9,8 @@ set(everest_src
   ${CMAKE_CURRENT_SOURCE_DIR}/library/Hacl_Curve25519_joined.c
 )
 
-list(APPEND everest_inc ${CMAKE_CURRENT_SOURCE_DIR}/include ${CMAKE_CURRENT_SOURCE_DIR}/include/everest ${CMAKE_CURRENT_SOURCE_DIR}/include/everest/kremlib)
+list(APPEND everest_inc_public ${CMAKE_CURRENT_SOURCE_DIR}/include)
+list(APPEND everest_inc ${CMAKE_CURRENT_SOURCE_DIR}/include/everest ${CMAKE_CURRENT_SOURCE_DIR}/include/everest/kremlib)
 
 if(INSTALL_MBEDTLS_HEADERS)
 
@@ -21,5 +23,6 @@ if(INSTALL_MBEDTLS_HEADERS)
 endif(INSTALL_MBEDTLS_HEADERS)
 
 set(thirdparty_src ${thirdparty_src} ${everest_src} PARENT_SCOPE)
+set(thirdparty_inc_public ${thirdparty_inc_public} ${everest_inc_public} PARENT_SCOPE)
 set(thirdparty_inc ${thirdparty_inc} ${everest_inc} PARENT_SCOPE)
 set(thirdparty_def ${thirdparty_def} ${everest_def} PARENT_SCOPE)

CMakeLists.txt

@@ -219,6 +219,7 @@ endif(ENABLE_ZLIB_SUPPORT)
 add_subdirectory(include)
 
 add_subdirectory(3rdparty)
+include_directories(${thirdparty_inc_public})
 include_directories(${thirdparty_inc})
 list(APPEND libs ${thirdparty_lib})
 add_definitions(${thirdparty_def})