GYP changes for Clang/Android build.

build/common.gypi

Index: build/common.gypi
diff --git a/build/common.gypi b/build/common.gypi
index 3f64fa96e10e8cb83e6fac866efed49dcd81935c..cf7b92b767eb957aac1031cc96512c698deb1f05 100644
--- a/build/common.gypi
+++ b/build/common.gypi
@@ -2222,7 +2222,7 @@
                         'cflags': [ '-mfpu=neon', ],
                       }, {
                         'cflags': [ '-mfpu=<(arm_fpu)', ],
-                      }]
+                      }],
                     ],
                   }],
                   ['OS=="android"', {
@@ -2267,6 +2267,15 @@
                           '__ARM_ARCH_5TE__',
                         ],
                       }],
+                      ['clang==1', {
+                        'cflags!': [
+                          # Clang does not support the following options.
+                          '-mthumb-interwork',
+                          '-finline-limit=64',
+                          '-fno-tree-sra',
+                          '-Wno-psabi',
+                        ],
+                      }],
                     ],
                   }],
                 ],
@@ -2583,6 +2592,33 @@
               ['android_upstream_bringup==1', {
                 'defines': ['ANDROID_UPSTREAM_BRINGUP=1',],
               }],
+              ['clang==1', {
+                'cflags': [
+                  # Work around incompatibilities between bionic and clang
+                  # headers.
+                  '-D__compiler_offsetof=__builtin_offsetof',
+                  '-Dnan=__builtin_nan',
+                ],
+                'conditions': [
+                  ['target_arch=="arm"', {
+                    'cflags': [
+                      '-target arm-linux-androideabi',
+                      '-mllvm -arm-enable-ehabi',
+                    ],
+                    'ldflags': [
+                      '-target arm-linux-androideabi',
+                    ],
+                  }],
+                  ['target_arch=="ia32"', {
+                    'cflags': [
+                      '-target x86-linux-androideabi',
+                    ],
+                    'ldflags': [
+                      '-target x86-linux-androideabi',
+                    ],
+                  }],
+                ],
+              }],
               ['android_build_type==0', {
                 'defines': [
                   # The NDK has these things, but doesn't define the constants
@@ -3284,7 +3320,7 @@
         ],
       },
     }],
-    ['clang==1 and OS!="android"', {
+    ['clang==1', {
       'make_global_settings': [
         ['CC', '<(make_clang_dir)/bin/clang'],
         ['CXX', '<(make_clang_dir)/bin/clang++'],
@@ -3294,7 +3330,7 @@
         ['LINK.host', '$(LINK)'],
       ],
     }],
-    ['OS=="android" and "<(GENERATOR)"!="ninja"', {
+    ['OS=="android" and clang==0 and "<(GENERATOR)"!="ninja"', {
       # Hardcode the compiler names in the Makefile so that
       # it won't depend on the environment at make time.
       'make_global_settings': [