[PATCH] [OPENMP] Replace libgomp by libiomp5 in driver

[Alexey Bataev]

Hi doug.gregor, hfinkel, cbergstrom, gribozavr, fraggamuffin,

http://llvm-reviews.chandlerc.com/D2841

Files:
  test/OpenMP/linking.c
  lib/Driver/Tools.cpp

Index: test/OpenMP/linking.c
===================================================================
--- test/OpenMP/linking.c
+++ test/OpenMP/linking.c
@@ -5,12 +5,12 @@
 // RUN:     -fopenmp -target i386-unknown-linux \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-32 %s
 // CHECK-LD-32: "{{.*}}ld{{(.exe)?}}"
-// CHECK-LD-32: "-lgomp" "-lrt" "-lgcc"
-// CHECK-LD-32: "-lpthread" "-lc"
+// CHECK-LD-32: "-liomp5" "-lgcc"
+// CHECK-LD-32: "-lc"
 //
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -fopenmp -target x86_64-unknown-linux \
 // RUN:   | FileCheck --check-prefix=CHECK-LD-64 %s
 // CHECK-LD-64: "{{.*}}ld{{(.exe)?}}"
-// CHECK-LD-64: "-lgomp" "-lrt" "-lgcc"
-// CHECK-LD-64: "-lpthread" "-lc"
+// CHECK-LD-64: "-liomp5" "-lgcc"
+// CHECK-LD-64: "-lc"
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -5200,8 +5200,7 @@
   Args.AddAllArgs(CmdArgs, options::OPT_L);
 
   if (Args.hasArg(options::OPT_fopenmp))
-    // This is more complicated in gcc...
-    CmdArgs.push_back("-lgomp");
+    CmdArgs.push_back("-liomp5");
 
   AddLinkerInputs(getToolChain(), Inputs, Args, CmdArgs);
   
@@ -6797,19 +6796,13 @@
       if (Args.hasArg(options::OPT_static))
         CmdArgs.push_back("--start-group");
 
-      bool OpenMP = Args.hasArg(options::OPT_fopenmp);
-      if (OpenMP) {
-        CmdArgs.push_back("-lgomp");
-
-        // FIXME: Exclude this for platforms with libgomp that don't require
-        // librt. Most modern Linux platforms require it, but some may not.
-        CmdArgs.push_back("-lrt");
-      }
+      if (Args.hasArg(options::OPT_fopenmp))
+        CmdArgs.push_back("-liomp5");
 
       AddRunTimeLibs(ToolChain, D, CmdArgs, Args);
 
       if (Args.hasArg(options::OPT_pthread) ||
-          Args.hasArg(options::OPT_pthreads) || OpenMP)
+          Args.hasArg(options::OPT_pthreads))
         CmdArgs.push_back("-lpthread");
 
       CmdArgs.push_back("-lc");
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