@@ -471,6 +471,12 @@ mod c_system {
471471 output
472472 }
473473
474+ // This can be obtained by adding the line:
475+ // message(STATUS "All builtin supported architectures: ${ALL_BUILTIN_SUPPORTED_ARCH}")
476+ // to the bottom of compiler-rt/cmake/builtin-config-ix.cmake, then running
477+ // cmake and looking at the output.
478+ const ALL_SUPPORTED_ARCHES : & ' static str = "i386;x86_64;arm;armhf;armv6m;armv7m;armv7em;armv7;armv7s;armv7k;aarch64;hexagon;mips;mipsel;mips64;mips64el;powerpc64;powerpc64le;riscv32;riscv64;wasm32;wasm64" ;
479+ 474480 // This function recreates the logic of getArchNameForCompilerRTLib,
475481 // defined in clang/lib/Driver/ToolChain.cpp.
476482 fn get_arch_name_for_compiler_rtlib ( ) -> String {
@@ -499,6 +505,10 @@ mod c_system {
499505 let target_os = env:: var ( "CARGO_CFG_TARGET_OS" ) . unwrap ( ) ;
500506 let compiler_rt_arch = get_arch_name_for_compiler_rtlib ( ) ;
501507
508+ if ALL_SUPPORTED_ARCHES . split ( ";" ) . find ( |x| * x == compiler_rt_arch) == None {
509+ return ;
510+ }
511+ 502512 if let Ok ( clang) = env:: var ( "CLANG" ) {
503513 let output = success_output (
504514 "failed to find clang's compiler-rt" ,
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