[compiler-rt] Disable WPD/VFE if LTO is disabled

WPD/VFE requires LTO, so if LTO is disabled, we should also disable WPD/VFE to avoid build failure

Author: Andarwinux

compiler-rt/CMakeLists.txt

@@ -363,8 +363,11 @@ append_list_if(COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG -fvisibility=hidden SANIT
 if(NOT COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG)
   append_list_if(COMPILER_RT_HAS_FVISIBILITY_INLINES_HIDDEN_FLAG -fvisibility-inlines-hidden SANITIZER_COMMON_CFLAGS)
 endif()
-append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SANITIZER_COMMON_CFLAGS)
-
+if(NOT COMPILER_RT_ENABLE_LTO)
+  append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SANITIZER_COMMON_CFLAGS)
+  append_list_if(COMPILER_RT_HAS_FNO_WPD_FLAG -fno-whole-program-vtables SANITIZER_COMMON_CFLAGS)
+  append_list_if(COMPILER_RT_HAS_FNO_VFE_FLAG -fno-virtual-function-elimination SANITIZER_COMMON_CFLAGS)
+endif()
 # By default do not instrument or use profdata for compiler-rt.
 if(NOT COMPILER_RT_ENABLE_PGO)
   if(LLVM_PROFDATA_FILE AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG)

compiler-rt/cmake/Modules/AddCompilerRT.cmake

@@ -178,8 +178,14 @@ function(add_compiler_rt_runtime name type)
   # Until we support this some other way, build compiler-rt runtime without LTO
   # to allow non-LTO projects to link with it. GPU targets can currently only be
   # distributed as LLVM-IR and ignore this.
-  if(COMPILER_RT_HAS_FNO_LTO_FLAG AND NOT COMPILER_RT_GPU_BUILD)
+  if(COMPILER_RT_HAS_FNO_LTO_FLAG AND NOT COMPILER_RT_GPU_BUILD OR NOT COMPILER_RT_ENABLE_LTO)
     set(NO_LTO_FLAGS "-fno-lto")
+    if(COMPILER_RT_HAS_FNO_WPD_FLAG)
+      list(APPEND NO_LTO_FLAGS "-fno-whole-program-vtables")
+    endif()
+    if(COMPILER_RT_HAS_FNO_VFE_FLAG)
+      list(APPEND NO_LTO_FLAGS "-fno-virtual-function-elimination")
+    endif()
   else()
     set(NO_LTO_FLAGS "")
   endif()

compiler-rt/cmake/Modules/CheckSectionExists.cmake

@@ -17,7 +17,11 @@ function(check_section_exists section output)
   if(CMAKE_C_COMPILER_ID MATCHES Clang AND CMAKE_C_COMPILER_TARGET)
     list(APPEND try_compile_flags "-target ${CMAKE_C_COMPILER_TARGET}")
   endif()
-  append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto try_compile_flags)
+  if(NOT COMPILER_RT_ENABLE_LTO)
+    append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto try_compile_flags)
+    append_list_if(COMPILER_RT_HAS_FNO_WPD_FLAG -fno-whole-program-vtables try_compile_flags)
+    append_list_if(COMPILER_RT_HAS_FNO_VFE_FLAG -fno-virtual-function-elimination try_compile_flags)
+  endif()
   if(NOT COMPILER_RT_ENABLE_PGO)
     if(LLVM_PROFDATA_FILE AND COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG)
       list(APPEND try_compile_flags "-fno-profile-instr-use")

compiler-rt/cmake/builtin-config-ix.cmake

@@ -15,6 +15,8 @@ builtin_check_c_compiler_flag(-fomit-frame-pointer  COMPILER_RT_HAS_OMIT_FRAME_P
 builtin_check_c_compiler_flag(-ffreestanding        COMPILER_RT_HAS_FFREESTANDING_FLAG)
 builtin_check_c_compiler_flag(-fxray-instrument     COMPILER_RT_HAS_XRAY_COMPILER_FLAG)
 builtin_check_c_compiler_flag(-fno-lto              COMPILER_RT_HAS_FNO_LTO_FLAG)
+builtin_check_c_compiler_flag(-fno-whole-program-vtables COMPILER_RT_HAS_FNO_WPD_FLAG)
+builtin_check_c_compiler_flag(-fno-virtual-function-elimination COMPILER_RT_HAS_FNO_VFE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-generate COMPILER_RT_HAS_FNO_PROFILE_GENERATE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-instr-generate COMPILER_RT_HAS_FNO_PROFILE_INSTR_GENERATE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-instr-use COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG)

compiler-rt/cmake/config-ix.cmake

@@ -105,6 +105,8 @@ check_cxx_compiler_flag(-fno-rtti            COMPILER_RT_HAS_FNO_RTTI_FLAG)
 check_cxx_compiler_flag("-Werror -fno-function-sections" COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG)
 check_cxx_compiler_flag(-ftls-model=initial-exec COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC)
 check_cxx_compiler_flag(-fno-lto             COMPILER_RT_HAS_FNO_LTO_FLAG)
+check_cxx_compiler_flag(-fno-whole-program-vtables COMPILER_RT_HAS_FNO_WPD_FLAG)
+check_cxx_compiler_flag(-fno-virtual-function-elimination COMPILER_RT_HAS_FNO_VFE_FLAG)
 check_cxx_compiler_flag(-fno-profile-generate COMPILER_RT_HAS_FNO_PROFILE_GENERATE_FLAG)
 check_cxx_compiler_flag(-fno-profile-instr-generate COMPILER_RT_HAS_FNO_PROFILE_INSTR_GENERATE_FLAG)
 check_cxx_compiler_flag(-fno-profile-instr-use COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG)

compiler-rt/cmake/crt-config-ix.cmake

@@ -8,6 +8,8 @@ builtin_check_c_compiler_flag(-fPIC                 COMPILER_RT_HAS_FPIC_FLAG)
 builtin_check_c_compiler_flag(-std=c11              COMPILER_RT_HAS_STD_C11_FLAG)
 builtin_check_c_compiler_flag(-Wno-pedantic         COMPILER_RT_HAS_WNO_PEDANTIC)
 builtin_check_c_compiler_flag(-fno-lto              COMPILER_RT_HAS_FNO_LTO_FLAG)
+builtin_check_c_compiler_flag(-fno-whole-program-vtables COMPILER_RT_HAS_FNO_WPD_FLAG)
+builtin_check_c_compiler_flag(-fno-virtual-function-elimination COMPILER_RT_HAS_FNO_VFE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-generate COMPILER_RT_HAS_FNO_PROFILE_GENERATE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-instr-generate COMPILER_RT_HAS_FNO_PROFILE_INSTR_GENERATE_FLAG)
 builtin_check_c_compiler_flag(-fno-profile-instr-use COMPILER_RT_HAS_FNO_PROFILE_INSTR_USE_FLAG)

compiler-rt/lib/scudo/standalone/CMakeLists.txt

@@ -23,6 +23,8 @@ append_list_if(COMPILER_RT_HAS_WNO_PEDANTIC -Wno-pedantic SCUDO_CFLAGS)
 
 # FIXME: find cleaner way to agree with GWPAsan flags
 append_list_if(COMPILER_RT_HAS_FNO_LTO_FLAG -fno-lto SCUDO_CFLAGS)
+append_list_if(COMPILER_RT_HAS_FNO_WPD_FLAG -fno-whole-program-vtables SCUDO_CFLAGS)
+append_list_if(COMPILER_RT_HAS_FNO_VFE_FLAG -fno-virtual-function-elimination SCUDO_CFLAGS)
 
 if(COMPILER_RT_DEBUG)
   list(APPEND SCUDO_CFLAGS -O0 -DSCUDO_DEBUG=1 -DSCUDO_ENABLE_HOOKS=1)