[CMake] Add options to enable exceptions and enable RTTI

Co-authored-by: Marc Auberer <marc.auberer@sap.com>

Author: aengelke

CMakeLists.txt

@@ -23,16 +23,21 @@ else ()
     option(TPDE_ENABLE_ASSERTIONS "Enable assertions" ON)
 endif ()
 option(TPDE_BUILD_DOCS "Build documentation" OFF)
+option(TPDE_ENABLE_EH "Build with exception handling" OFF)
 
 # warnings
 if (MSVC)
     add_compile_options(/W4 /WX)
-    # disable RTTI and exceptions
-    add_compile_options(/GR- /EHsc /D_HAS_EXCEPTIONS=0)
+
+    # enable/disable exceptions
+    if (NOT TPDE_ENABLE_EH)
+        add_compile_options(/GR-)
+    endif ()
 else ()
     add_compile_options(-Wall -Wextra -Wpedantic)
-    # disable RTTI and exceptions
-    add_compile_options("$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti;-fno-exceptions>")
+    if (NOT TPDE_ENABLE_EH)
+        add_compile_options("$<$<COMPILE_LANGUAGE:CXX>:-fno-exceptions>")
+    endif ()
 
     # this is annoying
     add_compile_options(-Wno-missing-field-initializers)

tpde-encodegen/CMakeLists.txt

@@ -14,6 +14,7 @@ set(TPDE_LINK_LLVM_STATIC FALSE CACHE BOOL "Should LLVM be linked statically?")
 
 target_include_directories(tpde_encodegen SYSTEM PRIVATE ${LLVM_INCLUDE_DIRS})
 target_compile_definitions(tpde_encodegen PRIVATE ${LLVM_DEFINITIONS})
+target_compile_options(tpde_encodegen PRIVATE "$<$<COMPILE_LANGUAGE:CXX>:-fno-rtti;-fno-exceptions>")
 if (TPDE_LINK_LLVM_STATIC)
     llvm_map_components_to_libnames(TPDE_ENCODEGEN_LLVM_LIBS
         core X86 AArch64 CodeGen irreader irprinter passes mc support targetparser asmparser asmprinter bitreader bitstreamreader

tpde-llvm/CMakeLists.txt

@@ -30,6 +30,9 @@ set(TPDE_LINK_LLVM_STATIC FALSE CACHE BOOL "Should LLVM be linked statically?")
 
 target_include_directories(tpde_llvm SYSTEM PUBLIC ${LLVM_INCLUDE_DIRS})
 target_compile_definitions(tpde_llvm PUBLIC ${LLVM_DEFINITIONS})
+if (NOT LLVM_ENABLE_RTTI)
+    target_compile_options(tpde_llvm PUBLIC -fno-rtti)
+endif ()
 if (TPDE_LINK_LLVM_STATIC)
     llvm_map_components_to_libnames(TPDE_LLVM_LIBS
         analysis core irreader irprinter jitlink orcjit passes support bitreader bitstreamreader targetparser