Make ATTRIBUTE_FALLTHROUGH work cross-compiler (hercules-team#836)

* Make ATTRIBUTE_FALLTHROUGH work cross-compiler Current code doesn't work on LLVM. This should fix it so it works on gcc and llvm. * Update internal.h
tupyy · Aug 13, 2024 · 8018934 · 8018934
1 parent 6ed6a28
commit 8018934
Showing 1 changed file with 6 additions and 2 deletions.
diff --git a/src/internal.h b/src/internal.h
@@ -191,8 +191,12 @@
 /* Allow falling through in switch statements for the few cases where that
    is needed */
 #ifndef ATTRIBUTE_FALLTHROUGH
-#  if __GNUC_PREREQ (7, 0)
-#    define ATTRIBUTE_FALLTHROUGH __attribute__ ((fallthrough))
+#  if defined __has_attribute
+#    if __has_attribute (fallthrough)
+#      define ATTRIBUTE_FALLTHROUGH __attribute__ ((fallthrough))
+#    else
+#      define ATTRIBUTE_FALLTHROUGH
+#    endif
 #  else
 #    define ATTRIBUTE_FALLTHROUGH
 #  endif