[Driver][Linux] Pass --hash-style=gnu to ld unless special cased

To align with many Linux distributions which configure GCC with
--enable-default-hash-style=gnu or binutils with --with-linker-hash-style=gnu.
ld.lld does not support changed default, so passing the option in the driver is
better.

Note: there was a bug that Debian specified both --hash-style=gnu and
--hash-style=both. Actually its GCC has defaulted to --hash-style=gnu since 2007.

diff --git a/clang/lib/Driver/ToolChains/Linux.cpp b/clang/lib/Driver/ToolChains/Linux.cpp
index 169daa8..756994a 100644 (file)
--- a/clang/lib/Driver/ToolChains/Linux.cpp
+++ b/clang/lib/Driver/ToolChains/Linux.cpp
@@ -239,16 +239,12 @@ Linux::Linux(const Driver &D, const llvm::Triple &Triple, const ArgList &Args)
   // Android loader does not support .gnu.hash until API 23.
   // Hexagon linker/loader does not support .gnu.hash
   if (!IsMips && !IsHexagon) {
-    if (Distro.IsRedhat() || Distro.IsOpenSUSE() || Distro.IsAlpineLinux() ||
-        (Distro.IsUbuntu() && Distro >= Distro::UbuntuMaverick) ||
-        (IsAndroid && !Triple.isAndroidVersionLT(23)))
-      ExtraOpts.push_back("--hash-style=gnu");
-
-    if (Distro.IsDebian() || Distro.IsOpenSUSE() ||
-        Distro == Distro::UbuntuLucid || Distro == Distro::UbuntuJaunty ||
-        Distro == Distro::UbuntuKarmic ||
+    if (Distro.IsOpenSUSE() || Distro == Distro::UbuntuLucid ||
+        Distro == Distro::UbuntuJaunty || Distro == Distro::UbuntuKarmic ||
         (IsAndroid && Triple.isAndroidVersionLT(23)))
       ExtraOpts.push_back("--hash-style=both");
+    else
+      ExtraOpts.push_back("--hash-style=gnu");
   }
 
 #ifdef ENABLE_LINKER_BUILD_ID