Fix include directories in build interface

src/dcuhre/CMakeLists.txt

@@ -148,4 +148,7 @@ list(TRANSFORM DCUHRE_LIB_SOURCES PREPEND "${DCUHRE_SOURCE_DIR}/")
 
 target_sources(DCUHRE PRIVATE ${DCUHRE_LIB_SOURCES})
 
-target_include_directories(DCUHRE PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+target_include_directories(DCUHRE PUBLIC
+    "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)

src/dquad/CMakeLists.txt

@@ -136,4 +136,7 @@ list(TRANSFORM DQUAD_LIB_SOURCES PREPEND "${DQUAD_SOURCE_DIR}/")
 
 target_sources(DQUAD PRIVATE ${DQUAD_LIB_SOURCES})
 
-target_include_directories(DCUHRE PUBLIC $<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>)
+target_include_directories(DQUAD PUBLIC
+    "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)