Implement a CLANG_PREREQUISITE macro

cms-sw · Jun 7, 2024 · 4f141ff · 4f141ff
1 parent 695ed78
commit 4f141ff
Showing 1 changed file with 18 additions and 0 deletions.
diff --git a/FWCore/Utilities/interface/ClangPrerequisite.h b/FWCore/Utilities/interface/ClangPrerequisite.h
@@ -0,0 +1,18 @@
+#ifndef FWCore_Utilities_interface_ClangPrerequisite_h
+#define FWCore_Utilities_interface_ClangPrerequisite_h
+
+/* Convenience macro to test the version of clang.
+   Use it like this:
+   #if CLANG_PREREQUISITE(9,0,1)
+   ... code requiring clang 9.0.1 or later ...
+   #endif
+   */
+
+#if defined __clang__ && defined __clang_major__ && defined __clang_minor__ && defined __clang_patchlevel__
+#define CLANG_PREREQUISITE(maj, min, patch) \
+  ((__clang_major__ << 16) + (__clang_minor__ << 8) + __clang_patchlevel__ >= ((maj) << 16) + ((min) << 8) + (patch))
+#else
+#define CLANG_PREREQUISITE(maj, min, patch) 0
+#endif
+
+#endif  // FWCore_Utilities_interface_ClangPrerequisite_h