commit 36f6e408845c8c539128f3fb9cb132bf1845a2c8
Author: Florian Weimer <fweimer@redhat.com>
Date:   Tue Mar 9 21:07:24 2021 +0100

    <shlib-compat.h>: Support compat_symbol_reference for _ISOMAC
    
    This is helpful for testing compat symbols in cases where _ISOMAC
    is activated implicitly due to -DMODULE_NAME=testsuite and cannot
    be disabled easily.

diff --git a/include/libc-symbols.h b/include/libc-symbols.h
index 41436050d060b89f..44e12b63d40cc572 100644
--- a/include/libc-symbols.h
+++ b/include/libc-symbols.h
@@ -59,6 +59,19 @@
 # define IN_MODULE (-1)
 #endif
 
+/* Use symbol_version_reference to specify the version a symbol
+   reference should link to.  Use symbol_version or
+   default_symbol_version for the definition of a versioned symbol.
+   The difference is that the latter is a no-op in non-shared
+   builds.  */
+#ifdef __ASSEMBLER__
+# define symbol_version_reference(real, name, version) \
+     .symver real, name##@##version
+#else  /* !__ASSEMBLER__ */
+# define symbol_version_reference(real, name, version) \
+  __asm__ (".symver " #real "," #name "@" #version)
+#endif
+
 #ifndef _ISOMAC
 
 /* This is defined for the compilation of all C library code.  features.h
@@ -388,19 +401,6 @@ for linking")
    past the last element in SET.  */
 #define symbol_set_end_p(set, ptr) ((ptr) >= (void *const *) &__stop_##set)
 
-/* Use symbol_version_reference to specify the version a symbol
-   reference should link to.  Use symbol_version or
-   default_symbol_version for the definition of a versioned symbol.
-   The difference is that the latter is a no-op in non-shared
-   builds.  */
-#ifdef __ASSEMBLER__
-# define symbol_version_reference(real, name, version) \
-     .symver real, name##@##version
-#else  /* !__ASSEMBLER__ */
-# define symbol_version_reference(real, name, version) \
-  __asm__ (".symver " #real "," #name "@" #version)
-#endif
-
 #ifdef SHARED
 # define symbol_version(real, name, version) \
   symbol_version_reference(real, name, version)