COFF: Implement /merge option.
/merge:.foo=.bar makes the linker to merge section .foo with section .bar.
llvm-svn: 241396
diff --git a/lld/COFF/DriverUtils.cpp b/lld/COFF/DriverUtils.cpp
index 2cd3684..1542256 100644
--- a/lld/COFF/DriverUtils.cpp
+++ b/lld/COFF/DriverUtils.cpp
@@ -172,6 +172,23 @@
return std::error_code();
}
+// Parse a string of the form of "<from>=<to>".
+// Results are directly written to Config.
+std::error_code parseMerge(StringRef S) {
+ StringRef From, To;
+ std::tie(From, To) = S.split('=');
+ if (From.empty() || To.empty()) {
+ llvm::errs() << "/merge: invalid argument: " << S << "\n";
+ return make_error_code(LLDError::InvalidOption);
+ }
+ auto Pair = Config->Merge.insert(std::make_pair(From, To));
+ bool Inserted = Pair.second;
+ if (!Inserted)
+ llvm::errs() << "warning: " << S << ": already merged into "
+ << Pair.first->second << "\n";
+ return std::error_code();
+}
+
// Parses a string in the form of "EMBED[,=<integer>]|NO".
// Results are directly written to Config.
std::error_code parseManifest(StringRef Arg) {