[Driver] add -lresolv for all but Android.

As there 3 intercepts that depend on libresolv, link tests in ./configure scripts may be confuse by the presence of resolv symbols (i.e. dn_expand) even with -lresolv and get a runtime error. Android provides the functionality in libc. https://reviews.llvm.org/D122849 https://reviews.llvm.org/D126851 Reviewed By: eugenis, MaskRay Differential Revision: https://reviews.llvm.org/D127145

Author: kda

clang/lib/Driver/ToolChains/CommonArgs.cpp

@@ -838,6 +838,9 @@ void tools::linkSanitizerRuntimeDeps(const ToolChain &TC,
  TC.getTriple().isOSNetBSD() ||
  TC.getTriple().isOSOpenBSD())
  CmdArgs.push_back("-lexecinfo");
+ // There is no libresolv on Android.
+ if (!TC.getTriple().isAndroid())
+ CmdArgs.push_back("-lresolv");
 }
 
 static void

compiler-rt/test/msan/Linux/b64.cpp

@@ -1,4 +1,4 @@
-// RUN: %clangxx_msan -O0 %s -o %t -lresolv && %run %t
+// RUN: %clangxx_msan -O0 %s -o %t && %run %t
 // RUN: not %run %t NTOP_READ 2>&1 | FileCheck %s --check-prefix=NTOP_READ
 // RUN: not %run %t PTON_READ 2>&1 | FileCheck %s --check-prefix=PTON_READ
 

compiler-rt/test/msan/Linux/dn_expand.cpp

@@ -1,4 +1,4 @@
-// RUN: %clangxx_msan -O0 %s -o %t -lresolv && %run %t
+// RUN: %clangxx_msan -O0 %s -o %t && %run %t
 
 #include <assert.h>
 #include <resolv.h>

compiler-rt/test/sanitizer_common/TestCases/Linux/b64.cpp

@@ -1,7 +1,4 @@
-// RUN: %clangxx %s -o %t -lresolv && %run %t %p
-
-// -lresolv fails on Android.
-// UNSUPPORTED: android
+// RUN: %clangxx %s -o %t && %run %t %p
 
 #include <assert.h>
 #include <resolv.h>

compiler-rt/test/sanitizer_common/TestCases/Linux/dn_expand.cpp

@@ -1,7 +1,4 @@
-// RUN: %clangxx %s -o %t -lresolv && %run %t %p
-
-// -lresolv fails on Android.
-// UNSUPPORTED: android
+// RUN: %clangxx %s -o %t && %run %t %p
 
 #include <assert.h>
 #include <resolv.h>