Driver/Darwin: Pass -pie/-no_pie to the linker when -fpie/-fno-pie and friends

are explicitly given.

llvm-svn: 108297

clang/include/clang/Driver/ArgList.h

@@ -179,6 +179,8 @@ namespace driver {
     Arg *getLastArg(OptSpecifier Id) const;
     Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1) const;
     Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2) const;
+    Arg *getLastArg(OptSpecifier Id0, OptSpecifier Id1, OptSpecifier Id2,
+                    OptSpecifier Id3) const;
 
     /// getArgString - Return the input argument string at \arg Index.
     virtual const char *getArgString(unsigned Index) const = 0;

clang/include/clang/Driver/Options.td

@@ -230,6 +230,7 @@ def exported__symbols__list : Separate<"-exported_symbols_list">;
 def e : JoinedOrSeparate<"-e">;
 def fPIC : Flag<"-fPIC">, Group<f_Group>;
 def fPIE : Flag<"-fPIE">, Group<f_Group>;
+def fno_PIE : Flag<"-fno-PIE">, Group<f_Group>;
 def faccess_control : Flag<"-faccess-control">, Group<f_Group>;
 def fapple_kext : Flag<"-fapple-kext">, Group<f_Group>;
 def fasm : Flag<"-fasm">, Group<f_Group>;
@@ -356,6 +357,7 @@ def fpascal_strings : Flag<"-fpascal-strings">, Group<f_Group>;
 def fpch_preprocess : Flag<"-fpch-preprocess">, Group<f_Group>;
 def fpic : Flag<"-fpic">, Group<f_Group>;
 def fpie : Flag<"-fpie">, Group<f_Group>;
+def fno_pie : Flag<"-fno-pie">, Group<f_Group>;
 def fprofile_arcs : Flag<"-fprofile-arcs">, Group<f_Group>;
 def fprofile_generate : Flag<"-fprofile-generate">, Group<f_Group>;
 def framework : Separate<"-framework">, Flags<[LinkerInput]>;

clang/lib/Driver/ArgList.cpp

@@ -95,6 +95,25 @@ Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
   return Res;
 }
 
+Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
+                         OptSpecifier Id2, OptSpecifier Id3) const {
+  Arg *Res = 0;
+  for (const_reverse_iterator it = rbegin(), ie = rend(); it != ie; ++it) {
+    if ((*it)->getOption().matches(Id0) ||
+        (*it)->getOption().matches(Id1) ||
+        (*it)->getOption().matches(Id2) ||
+        (*it)->getOption().matches(Id3)) {
+      Res = *it;
+      break;
+    }
+  }
+
+  if (Res)
+    Res->claim();
+
+  return Res;
+}
+
 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default) const {
   if (Arg *A = getLastArg(Pos, Neg))
     return A->getOption().matches(Pos);

clang/lib/Driver/Tools.cpp

@@ -2356,8 +2356,15 @@ void darwin::Link::AddLinkArgs(const ArgList &Args,
   Args.AddAllArgs(CmdArgs, options::OPT_multiply__defined);
   Args.AddAllArgs(CmdArgs, options::OPT_multiply__defined__unused);
 
-  if (Args.hasArg(options::OPT_fpie))
-    CmdArgs.push_back("-pie");
+  if (const Arg *A = Args.getLastArg(options::OPT_fpie, options::OPT_fPIE,
+                                     options::OPT_fno_pie,
+                                     options::OPT_fno_PIE)) {
+    if (A->getOption().matches(options::OPT_fpie) ||
+        A->getOption().matches(options::OPT_fPIE))
+      CmdArgs.push_back("-pie");
+    else
+      CmdArgs.push_back("-no_pie");
+  }
 
   Args.AddLastArg(CmdArgs, options::OPT_prebind);
   Args.AddLastArg(CmdArgs, options::OPT_noprebind);

clang/test/Driver/darwin-ld.c

@@ -70,3 +70,15 @@
 // LINK_IPHONE_3_1: ld"
 // LINK_IPHONE_3_1-NOT: -lbundle1.o
 // LINK_IPHONE_3_1: -lSystem
+
+// RUN: %clang -ccc-host-triple i386-apple-darwin9 -### -fpie %t.o 2> %t.log
+// RUN: FileCheck -check-prefix=LINK_EXPLICIT_PIE %s < %t.log
+//
+// LINK_EXPLICIT_PIE: ld"
+// LINK_EXPLICIT_PIE: "-pie"
+
+// RUN: %clang -ccc-host-triple i386-apple-darwin9 -### -fno-pie %t.o 2> %t.log
+// RUN: FileCheck -check-prefix=LINK_EXPLICIT_NO_PIE %s < %t.log
+//
+// LINK_EXPLICIT_NO_PIE: ld"
+// LINK_EXPLICIT_NO_PIE: "-no_pie"