diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake
index ba740af9e1d60..42edbe15edafb 100644
--- a/compiler-rt/cmake/config-ix.cmake
+++ b/compiler-rt/cmake/config-ix.cmake
@@ -127,6 +127,7 @@ check_cxx_compiler_flag("-Werror -Wframe-larger-than=512" COMPILER_RT_HAS_WFRAME
 check_cxx_compiler_flag("-Werror -Wglobal-constructors"   COMPILER_RT_HAS_WGLOBAL_CONSTRUCTORS_FLAG)
 check_cxx_compiler_flag("-Werror -Wc99-extensions"     COMPILER_RT_HAS_WC99_EXTENSIONS_FLAG)
 check_cxx_compiler_flag("-Werror -Wgnu"                COMPILER_RT_HAS_WGNU_FLAG)
+check_cxx_compiler_flag("-Werror -Wgnu-anonymous-struct" COMPILER_RT_HAS_WGNU_ANONYMOUS_STRUCT_FLAG)
 check_cxx_compiler_flag("-Werror -Wvariadic-macros"    COMPILER_RT_HAS_WVARIADIC_MACROS_FLAG)
 check_cxx_compiler_flag("-Werror -Wunused-parameter"   COMPILER_RT_HAS_WUNUSED_PARAMETER_FLAG)
 check_cxx_compiler_flag("-Werror -Wcovered-switch-default" COMPILER_RT_HAS_WCOVERED_SWITCH_DEFAULT_FLAG)
diff --git a/compiler-rt/lib/ctx_profile/CMakeLists.txt b/compiler-rt/lib/ctx_profile/CMakeLists.txt
index d69cdf56df8fd..ce491fc7e8bf0 100644
--- a/compiler-rt/lib/ctx_profile/CMakeLists.txt
+++ b/compiler-rt/lib/ctx_profile/CMakeLists.txt
@@ -15,6 +15,9 @@ include_directories(../../include)
 # We don't use the C++ Standard Library here, so avoid including it by mistake.
 append_list_if(COMPILER_RT_HAS_NOSTDINCXX_FLAG -nostdinc++ EXTRA_FLAGS)
 
+# __sanitizer_siginfo
+append_list_if(COMPILER_RT_HAS_WGNU_ANONYMOUS_STRUCT_FLAG -Wno-gnu-anonymous-struct EXTRA_FLAGS)
+
 if(COMPILER_RT_INCLUDE_TESTS)
   add_subdirectory(tests)
 endif()