[PATCH] D15455: [Driver] Let -static override the toolchain default PIC setting.

[Frederic Riss via cfe-commits]

friss created this revision.
friss added reviewers: jyknight, rnk, joerg.
friss added a subscriber: cfe-commits.

In r245667 -static was changed not to disable -fPIC as they control
2 different concepts. On toolchains that enable -fPIC by default,
this means that now you have to pass "-static -fno-PIC" to get the
previous behavior.

As static usually means that we do not need PIC, this patches allows
-static to override the toolchain default. You can still build all the
combinations, but -static doesn't require -fno-PIC anymore on default-PIC
toolchains.

http://reviews.llvm.org/D15455

Files:
  lib/Driver/Tools.cpp
  test/Driver/pic.c

Index: test/Driver/pic.c
===================================================================
--- test/Driver/pic.c
+++ test/Driver/pic.c
@@ -217,7 +217,7 @@
 // RUN: %clang -c %s -target armv7-apple-ios -fapple-kext -miphoneos-version-min=5.0.0 -### 2>&1 \
 // RUN:   | FileCheck %s --check-prefix=CHECK-NO-PIC
 // RUN: %clang -c %s -target armv7-apple-ios -fapple-kext -miphoneos-version-min=6.0.0 -static -### 2>&1 \
-// RUN:   | FileCheck %s --check-prefix=CHECK-PIC2
+// RUN:   | FileCheck %s --check-prefix=CHECK-NO-PIC
 //
 // On OpenBSD, PIE is enabled by default, but can be disabled.
 // RUN: %clang -c %s -target amd64-pc-openbsd -### 2>&1 \
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -3121,8 +3121,9 @@
              const ArgList &Args) {
   // FIXME: why does this code...and so much everywhere else, use both
   // ToolChain.getTriple() and Triple?
-  bool PIE = ToolChain.isPIEDefault();
-  bool PIC = PIE || ToolChain.isPICDefault();
+  bool isStatic = Args.hasArg(options::OPT_static);
+  bool PIE = ToolChain.isPIEDefault() && !isStatic;
+  bool PIC = PIE || (ToolChain.isPICDefault() && !isStatic);
   bool IsPICLevelTwo = PIC;
 
   bool KernelOrKext =


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