From: Arthur Marble <arthur@info9.net>
Date: Wed, 16 Jul 2014 21:16:16 +0000 (+0000)
Subject: Typically linker options are protected with -Xlinker or -Wl,
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e8b35e1a75b0044239b1ac7b476d66352fafcb02;p=clang

Typically linker options are protected with -Xlinker or -Wl,
however certain sloppy Makefiles pass -z options directly to
the compiler. This patch enables clang to recognize these
options (because -z is not used by clang itself).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@213198 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index 3feee6ef18..5607626654 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -309,6 +309,8 @@ def Xassembler : Separate<["-"], "Xassembler">,
 def Xclang : Separate<["-"], "Xclang">,
   HelpText<"Pass <arg> to the clang compiler">, MetaVarName<"<arg>">,
   Flags<[DriverOption, CoreOption]>;
+def z : Separate<["-"], "z">, Flags<[LinkerInput, RenderAsInput]>,
+  HelpText<"Pass -z <arg> to the linker">, MetaVarName<"<arg>">;
 def Xlinker : Separate<["-"], "Xlinker">, Flags<[LinkerInput, RenderAsInput]>,
   HelpText<"Pass <arg> to the linker">, MetaVarName<"<arg>">;
 def Xpreprocessor : Separate<["-"], "Xpreprocessor">,
diff --git a/lib/Driver/Tools.cpp b/lib/Driver/Tools.cpp
index 60b8933821..e47db33803 100644
--- a/lib/Driver/Tools.cpp
+++ b/lib/Driver/Tools.cpp
@@ -201,8 +201,13 @@ static void AddLinkerInputs(const ToolChain &TC,
       TC.AddCXXStdlibLibArgs(Args, CmdArgs);
     else if (A.getOption().matches(options::OPT_Z_reserved_lib_cckext))
       TC.AddCCKextLibArgs(Args, CmdArgs);
-    else
-      A.renderAsInput(Args, CmdArgs);
+    else if (A.getOption().matches(options::OPT_z)) {
+      // Pass -z prefix for gcc linker compatibility.
+      A.claim();
+      A.render(Args, CmdArgs);
+    } else {
+       A.renderAsInput(Args, CmdArgs);
+    }
   }
 
   // LIBRARY_PATH - included following the user specified library paths.
diff --git a/test/Driver/Xlinker-args.c b/test/Driver/Xlinker-args.c
index 4285af7944..87b238b3b9 100644
--- a/test/Driver/Xlinker-args.c
+++ b/test/Driver/Xlinker-args.c
@@ -3,17 +3,17 @@
 
 // RUN: %clang -target i386-apple-darwin9 -### \
 // RUN:   -Xlinker one -Xlinker --no-demangle \
-// RUN:   -Wl,two,--no-demangle,three -Xlinker four %s 2> %t
+// RUN:   -Wl,two,--no-demangle,three -Xlinker four -z five %s 2> %t
 // RUN: FileCheck -check-prefix=DARWIN < %t %s
 //
 // RUN: %clang -target x86_64-pc-linux-gnu -### \
 // RUN:   -Xlinker one -Xlinker --no-demangle \
-// RUN:   -Wl,two,--no-demangle,three -Xlinker four %s 2> %t
+// RUN:   -Wl,two,--no-demangle,three -Xlinker four -z five %s 2> %t
 // RUN: FileCheck -check-prefix=LINUX < %t %s
 //
 // DARWIN-NOT: --no-demangle
-// DARWIN: "one" "two" "three" "four"
-// LINUX: "--no-demangle" "one" "two" "three" "four"
+// DARWIN: "one" "two" "three" "four" "-z" "five"
+// LINUX: "--no-demangle" "one" "two" "three" "four" "-z" "five"
 
 // Check that we forward '-Xlinker' and '-Wl,' on Windows.
 // RUN: %clang -target i686-pc-win32 -### \