[orc-rt] Add build options for EH and RTTI, and a config.h header.

orc-rt/CMakeLists.txt

@@ -30,6 +30,8 @@ option(ORC_RT_INCLUDE_DOCS "Build the ORC-RT documentation." ON)
 option(ORC_RT_ENABLE_ASSERTIONS "Enable assertions independent of build mode." ON)
 option(ORC_RT_ENABLE_PEDANTIC "Compile with pedantic enabled." ON)
 option(ORC_RT_ENABLE_WERROR "Fail and stop if a warning is triggered." OFF)
+option(ORC_RT_ENABLE_RTTI "Enable RTTI." ON)
+option(ORC_RT_ENABLE_EXCEPTIONS "Enable exceptions." ON)
 option(ORC_RT_INCLUDE_TESTS "Build ORC-RT tests." ${LLVM_INCLUDE_TESTS})
 
 set(CMAKE_CXX_STANDARD 17 CACHE STRING "C++ standard to conform to")
@@ -40,6 +42,23 @@ set(CMAKE_FOLDER "orc-rt")
 set(ORC_RT_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR})
 set(ORC_RT_BINARY_DIR ${CMAKE_CURRENT_BINARY_DIR})
 
+# Configure RTTI and exceptions compile flags
+set(ORC_RT_COMPILE_FLAGS)
+if(NOT ORC_RT_ENABLE_RTTI)
+  list(APPEND ORC_RT_COMPILE_FLAGS -fno-rtti)
+endif()
+
+if(NOT ORC_RT_ENABLE_EXCEPTIONS)
+  list(APPEND ORC_RT_COMPILE_FLAGS -fno-exceptions)
+endif()
+
+# Generate config header
+configure_file(
+  ${CMAKE_CURRENT_SOURCE_DIR}/include/orc-rt-c/config.h.in
+  ${CMAKE_CURRENT_BINARY_DIR}/include/orc-rt-c/config.h
+  @ONLY
+)
+
 #===============================================================================
 # Setup Source Code
 #===============================================================================

orc-rt/include/CMakeLists.txt

@@ -31,16 +31,28 @@ set(ORC_RT_HEADERS
     orc-rt/span.h
 )
 
+# Add generated config header
+set(ORC_RT_GENERATED_HEADERS
+    ${CMAKE_CURRENT_BINARY_DIR}/orc-rt-c/config.h
+)
+
 # TODO: Switch to filesets when we move to cmake-3.23.
 add_library(orc-rt-headers INTERFACE)
 target_include_directories(orc-rt-headers INTERFACE
     $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+    $<BUILD_INTERFACE:${PROJECT_BINARY_DIR}/include>
     $<INSTALL_INTERFACE:include>
 )
 set_property(TARGET orc-rt-headers
-    PROPERTY PUBLIC_HEADER ${ORC_RT_HEADERS}
+    PROPERTY PUBLIC_HEADER ${ORC_RT_HEADERS} ${ORC_RT_GENERATED_HEADERS}
 )
 install(TARGETS orc-rt-headers
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/
     COMPONENT OrcRT_Development
 )
+
+# Install generated config header
+install(FILES ${ORC_RT_GENERATED_HEADERS}
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/orc-rt-c/
+    COMPONENT OrcRT_Development
+)

orc-rt/lib/executor/CMakeLists.txt

@@ -12,6 +12,9 @@ add_library(orc-rt-executor STATIC ${files})
 target_link_libraries(orc-rt-executor
   PUBLIC orc-rt-headers
   )
+
+# Apply RTTI and exceptions compile flags
+target_compile_options(orc-rt-executor PRIVATE ${ORC_RT_COMPILE_FLAGS})
 install(TARGETS orc-rt-executor
   ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
           COMPONENT OrcRT_Development