[PATCH] D53344: [Driver] Use --warn-shared-textrel for Android.

[Dan Albert via Phabricator via cfe-commits]

danalbert created this revision.
danalbert added a reviewer: srhines.

Android does not allow shared text relocations. Enable the linker
warning to detect them by default.


Repository:
  rC Clang

https://reviews.llvm.org/D53344

Files:
  lib/Driver/ToolChains/Gnu.cpp
  test/Driver/linux-ld.c


Index: test/Driver/linux-ld.c
===================================================================
--- test/Driver/linux-ld.c
+++ test/Driver/linux-ld.c
@@ -989,7 +989,13 @@
 // RUN:   | FileCheck --check-prefix=CHECK-ANDROID-HASH-STYLE-M %s
 // CHECK-ANDROID-HASH-STYLE-M: "{{.*}}ld{{(.exe)?}}"
 // CHECK-ANDROID-HASH-STYLE-M: "--hash-style=gnu"
-//
+
+// RUN: %clang %s -### -o %t.o 2>&1 \
+// RUN:     --target=armv7-linux-android21 \
+// RUN:   | FileCheck --check-prefix=CHECK-ANDROID-WARN-SHARED-TEXTREL %s
+// CHECK-ANDROID-WARN-SHARED-TEXTREL: "{{.*}}ld{{(.exe)?}}"
+// CHECK-ANDROID-WARN-SHARED-TEXTREL: "--warn-shared-textrel"
+
 // RUN: %clang %s -### -o %t.o 2>&1 --target=mips64-linux-gnuabin32 \
 // RUN:   | FileCheck --check-prefix=CHECK-MIPS64EL-GNUABIN32 %s
 // CHECK-MIPS64EL-GNUABIN32: "{{.*}}ld{{(.exe)?}}"
Index: lib/Driver/ToolChains/Gnu.cpp
===================================================================
--- lib/Driver/ToolChains/Gnu.cpp
+++ lib/Driver/ToolChains/Gnu.cpp
@@ -375,6 +375,11 @@
       CmdArgs.push_back("--fix-cortex-a53-843419");
   }
 
+  // Android does not allow shared text relocations. Emit a warning if the
+  // user's code contains any.
+  if (isAndroid)
+      CmdArgs.push_back("--warn-shared-textrel");
+
   for (const auto &Opt : ToolChain.ExtraOpts)
     CmdArgs.push_back(Opt.c_str());
 


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