1 files changed, 3 insertions, 0 deletions
diff --git a/SCons/cpp.py b/SCons/cpp.py
index 353aa70..144f498 100644
--- a/SCons/cpp.py
+++ b/SCons/cpp.py
@@ -591,6 +591,9 @@ class PreProcessor:
         while not s[0] in '<"':
             try:
                 s = self.cpp_namespace[s]
+                # strip backslashes from the computed include (-DFOO_H=\"foo.h\")
+                for c in '<">':
+                    s = s.replace(f"\\{c}", c)
             except KeyError:
                 m = function_name.search(s)