Define FOLLY_ELF_NATIVE_CLASS if not defined and __ELF_NATIVE_CLASS is available

Summary: Define FOLLY_ELF_NATIVE_CLASS if not defined and __ELF_NATIVE_CLASS is available

Reviewed By: yfeldblum

Differential Revision: D23307593

fbshipit-source-id: bb4b7a82a58a9ba9d4725dd770a2e5b7109b0318

folly/Portability.h

@@ -565,13 +565,3 @@ constexpr auto kCpplibVer = 0;
 #define FOLLY_HAS_STRING_VIEW 0
 #endif
 #endif // __has_include
-
-#if defined(__linux__)
-#define FOLLY_ELF_NATIVE_CLASS __ELF_NATIVE_CLASS
-#elif defined(__FreeBSD__)
-#if defined(__LP64__)
-#define FOLLY_ELF_NATIVE_CLASS 64
-#else // __linux__
-#define FOLLY_ELF_NATIVE_CLASS 32
-#endif
-#endif // __linux__

folly/experimental/symbolizer/Elf.cpp

@@ -34,6 +34,16 @@
 #define STT_GNU_IFUNC 10
 #endif
 
+#if defined(__ELF_NATIVE_CLASS)
+#define FOLLY_ELF_NATIVE_CLASS __ELF_NATIVE_CLASS
+#elif defined(__FreeBSD__)
+#if defined(__LP64__)
+#define FOLLY_ELF_NATIVE_CLASS 64
+#else
+#define FOLLY_ELF_NATIVE_CLASS 32
+#endif
+#endif // __ELF_NATIVE_CLASS
+
 namespace folly {
 namespace symbolizer {