cmake : fix transient definitions in find pkg (#3411)

Author: bandoti

CMakeLists.txt

@@ -705,6 +705,7 @@ set(LLAMA_BIN_INSTALL_DIR ${CMAKE_INSTALL_BINDIR}
 set(LLAMA_BUILD_NUMBER ${BUILD_NUMBER})
 set(LLAMA_BUILD_COMMIT ${BUILD_COMMIT})
 set(LLAMA_INSTALL_VERSION 0.0.${BUILD_NUMBER})
+get_directory_property(LLAMA_TRANSIENT_DEFINES COMPILE_DEFINITIONS)
 
 configure_package_config_file(
         ${CMAKE_CURRENT_SOURCE_DIR}/scripts/LlamaConfig.cmake.in

examples/main-cmake-pkg/CMakeLists.txt

@@ -28,6 +28,16 @@ configure_file(${_common_path}/../build-info.h
 target_include_directories(common PUBLIC ${LLAMA_INCLUDE_DIR}
     ${CMAKE_CURRENT_BINARY_DIR})
 
+# If the common project was part of "main-cmake-pkg" the transient
+# defines would automatically be attached. Because the common func-
+# tionality is separate, but dependent upon the defines, it must be
+# explicitly extracted from the "llama" target.
+#
+get_target_property(_llama_transient_defines llama
+    INTERFACE_COMPILE_DEFINITIONS)
+
+target_compile_definitions(common PRIVATE "${_llama_transient_defines}")
+
 add_executable(${TARGET} ${CMAKE_CURRENT_LIST_DIR}/../main/main.cpp)
 target_include_directories(${TARGET} PRIVATE ${_common_path})
 install(TARGETS ${TARGET} RUNTIME)

scripts/LlamaConfig.cmake.in

@@ -56,11 +56,13 @@ find_library(llama_LIBRARY llama
     HINTS ${LLAMA_LIB_DIR})
 
 set(_llama_link_deps "Threads::Threads" "@LLAMA_EXTRA_LIBS@")
+set(_llama_transient_defines "@LLAMA_TRANSIENT_DEFINES@")
 add_library(llama UNKNOWN IMPORTED)
 set_target_properties(llama
     PROPERTIES
         INTERFACE_INCLUDE_DIRECTORIES "${LLAMA_INCLUDE_DIR}"
         INTERFACE_LINK_LIBRARIES "${_llama_link_deps}"
+        INTERFACE_COMPILE_DEFINITIONS "${_llama_transient_defines}"
         IMPORTED_LINK_INTERFACE_LANGUAGES "CXX"
         IMPORTED_LOCATION "${llama_LIBRARY}"
         INTERFACE_COMPILE_FEATURES cxx_std_11