[compiler-rt] [compiler-rt] allow building with uefi (PR #131499)

[Saleem Abdulrasool via llvm-commits]

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@@ -49,7 +49,7 @@
 #define SYMBOL_NAME(name) XSTR(__USER_LABEL_PREFIX__) #name
 
 #if defined(__ELF__) || defined(__MINGW32__) || defined(__wasm__) ||           \
-    defined(_AIX)    || defined(__CYGWIN__)
+    defined(_AIX) || defined(__CYGWIN__) || defined(__UEFI__)
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compnerd wrote:

I'm not sure that this is the right branch to target UEFI. UEFI doesn't use ELF and doesn't guarantee the GNU syntax. What if you completely disable aliasing as per the Windows path on L67?

https://github.com/llvm/llvm-project/pull/131499