[PATCH] D56288: [ELF] Do not enable 'new dtags' on NetBSD by default

[Michał Górny via Phabricator via cfe-commits]

mgorny created this revision.
mgorny added reviewers: ruiu, krytarowski, joerg.
Herald added subscribers: llvm-commits, arichardson, emaste.
Herald added a reviewer: espindola.

NetBSD strongly prefers using 'old' dtag (RPATH) over Linux-specific
RUNPATH, and did not support the latter until very recently.  Therefore,
defaulting to RUNPATH causes lld to produce non-working executables
by default.  Switch the default appropriately when building on NetBSD.


Repository:
  rLLD LLVM Linker

https://reviews.llvm.org/D56288

Files:
  ELF/Driver.cpp


Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -766,6 +766,14 @@
 
 // Initializes Config members by the command line options.
 void LinkerDriver::readConfigs(opt::InputArgList &Args) {
+#if defined(__NetBSD__)
+// NetBSD prefers RPATH, and does not allow RUNPATH until very recently
+#  define DEFAULT_NEW_DTAGS false
+#else
+#  define DEFAULT_NEW_DTAGS true
+#endif
+
+
   errorHandler().Verbose = Args.hasArg(OPT_verbose);
   errorHandler().FatalWarnings =
       Args.hasFlag(OPT_fatal_warnings, OPT_no_fatal_warnings, false);
@@ -797,7 +805,8 @@
   Config->CallGraphProfileSort = Args.hasFlag(
       OPT_call_graph_profile_sort, OPT_no_call_graph_profile_sort, true);
   Config->EnableNewDtags =
-      Args.hasFlag(OPT_enable_new_dtags, OPT_disable_new_dtags, true);
+      Args.hasFlag(OPT_enable_new_dtags, OPT_disable_new_dtags,
+                   DEFAULT_NEW_DTAGS);
   Config->Entry = Args.getLastArgValue(OPT_entry);
   Config->ExecuteOnly =
       Args.hasFlag(OPT_execute_only, OPT_no_execute_only, false);


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