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-rw-r--r--clang/lib/Frontend/CompilerInvocation.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 080320cf608..56f66537557 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -3315,6 +3315,9 @@ static void ParsePreprocessorArgs(PreprocessorOptions &Opts, ArgList &Args,
for (const auto *A : Args.filtered(OPT_error_on_deserialized_pch_decl))
Opts.DeserializedPCHDeclsToErrorOn.insert(A->getValue());
+ for (const auto &A : Args.getAllArgValues(OPT_fmacro_prefix_map_EQ))
+ Opts.MacroPrefixMap.insert(StringRef(A).split('='));
+
if (const Arg *A = Args.getLastArg(OPT_preamble_bytes_EQ)) {
StringRef Value(A->getValue());
size_t Comma = Value.find(',');
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