Attempt to fix issue with HEADER file sets basedir

CMakeLists.txt

@@ -228,7 +228,12 @@ list(TRANSFORM CPARSE_LLVM_SRCS PREPEND "${CMAKE_SOURCE_DIR}/src/")
 # If we refactor into a library that executables link against it will simplify this and reduce repitition
 add_executable(cparse-llvm)
 target_sources(cparse-llvm PUBLIC ${CPARSE_LLVM_SRCS})
-target_sources(cparse-llvm PUBLIC FILE_SET headers TYPE HEADERS FILES ${SALT_HEADER_FILES})
+target_sources(cparse-llvm
+  PUBLIC
+  FILE_SET headers
+  TYPE HEADERS
+  FILES ${SALT_HEADER_FILES}
+  BASE_DIRS ${CMAKE_SOURCE_DIR}/include;${CMAKE_BINARY_DIR}/include)
 target_include_directories(cparse-llvm PUBLIC "${CMAKE_SOURCE_DIR}/include" "${CMAKE_BINARY_DIR}/include")
 target_compile_features(cparse-llvm PUBLIC cxx_std_17)
 target_link_libraries(cparse-llvm PUBLIC SALT_LLVM_TOOLING) # Inherit definitions, compile features, etc.
@@ -310,7 +315,11 @@ if(MLIR_FOUND AND Flang_FOUND)
 
     add_library(salt-flang-plugin SHARED)
     target_sources(salt-flang-plugin PUBLIC ${SALT_FLANG_PLUGIN_SRCS})
-    target_sources(salt-flang-plugin PUBLIC FILE_SET headers TYPE HEADERS FILES ${SALT_FLANG_PLUGIN_HEADER_FILES})
+    target_sources(salt-flang-plugin
+      PUBLIC
+      FILE_SET headers
+      TYPE HEADERS
+      FILES ${SALT_FLANG_PLUGIN_HEADER_FILES})
     target_include_directories(salt-flang-plugin PUBLIC "${CMAKE_SOURCE_DIR}/include" "${CMAKE_BINARY_DIR}/include" )
     target_compile_features(salt-flang-plugin PUBLIC cxx_std_17)
     target_link_libraries(salt-flang-plugin PUBLIC SALT_FLANG_FRONTEND)