[libunwind] Only include cet.h if __CET__ defined

nikic · nikic · commit 2d2ef384b2f6 · 2022-02-16T09:45:54.000+01:00
We should not assume that the cet.h header exists just because we're on x86 linux. Only include it if __CET__ is defined. This makes the code more similar to what compiler-rt does in https://github.com/llvm/llvm-project/blob/ee423d93ead39e94c2970b3cc7ef6e6faa75d10b/compiler-rt/lib/builtins/assembly.h#L17 (though that one also has a __has_include() check -- I've not found that to be necessary). Differential Revision: https://reviews.llvm.org/D119697
diff --git a/libunwind/src/assembly.h b/libunwind/src/assembly.h
@@ -15,7 +15,7 @@
 #ifndef UNWIND_ASSEMBLY_H
 #define UNWIND_ASSEMBLY_H
 
-#if (defined(__i386__) || defined(__x86_64__)) && defined(__linux__)
+#if defined(__linux__) && defined(__CET__)
 #include <cet.h>
 #define _LIBUNWIND_CET_ENDBR _CET_ENDBR
 #else
