Support for ARM NaCl untrusted runtime build.

ppapi/native_client/native_client.gyp

Index: ppapi/native_client/native_client.gyp
diff --git a/ppapi/native_client/native_client.gyp b/ppapi/native_client/native_client.gyp
index f9ffdb95d6f47722081d3831831555fed8c9997b..c54fae487926e42b94219ff8c0b1d797e381d3ff 100644
--- a/ppapi/native_client/native_client.gyp
+++ b/ppapi/native_client/native_client.gyp
@@ -29,6 +29,12 @@
                   '<(DEPTH)/native_client/src/untrusted/irt_stub/libppapi.a',
               ],
             },
+            {
+              'destination': '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm',
+              'files': [
+                '<(DEPTH)/native_client/src/untrusted/irt_stub/libppapi.a',
+              ],
+            },
           ],
         },
         {
@@ -38,6 +44,7 @@
             'nexe_target': 'nacl_irt',
             'out64': '<(PRODUCT_DIR)/nacl_irt_x86_64.nexe',
             'out32': '<(PRODUCT_DIR)/nacl_irt_x86_32.nexe',
+            'out_arm': '<(PRODUCT_DIR)/nacl_irt_arm.nexe',
             'build_glibc': 0,
             'build_newlib': 1,
             'include_dirs': [
@@ -53,8 +60,27 @@
               '-lplatform',
               '-lgio',
               '-lm',
-              '-Wl,--section-start,.rodata=<(NACL_IRT_DATA_START)',
-              '-Wl,-Ttext-segment=<(NACL_IRT_TEXT_START)',
+              '-lpthread',
+            ],
+            'conditions': [
+              ['target_arch!="arm"',
+               {
+                 'link_flags': [
+                   '-Wl,--section-start,.rodata=<(NACL_IRT_DATA_START)',
+                   '-Wl,-Ttext-segment=<(NACL_IRT_TEXT_START)',
+                 ]
+               }, { # target_arch == "arm"
+                 'link_flags': [
+                   '-Wl,--section-start,.rodata=<(NACL_IRT_DATA_START)',
+                   '-Wl,-Ttext=<(NACL_IRT_TEXT_START)',

[robertm, 2012/03/26 14:30:44]

it would be nice to see whether arm would would work with
-Wl,-Ttext-segment=<(NACL_IRT_TEXT_START)'

so that the x86 and arm version are more similar

[Nikolay, 2012/03/26 14:59:56]

See comment in native_client/src/untrusted/irt/nacl.scons regarding this switch.
It's ugly, and indeed better be unified.

On 2012/03/26 14:30:44, robertm wrote:

+                   '--pnacl-allow-native',
+                   '-arch', 'arm',
+                   '-Wt,-mtls-use-call',

[robertm, 2012/03/26 14:30:44]

Can you double check the -Wt,-mtls-use-call setting
I think I saw the opposite in another CL where we were uisng
'-Wt,-mtls-use-call' for x86 but not for arm.

I will also ping jvoung about this 

[Nikolay, 2012/03/26 14:59:56]

Hmm, I tried to model after scons

On 2012/03/26 14:30:44, robertm wrote:

+                   # TODO(olonho): rethink
+                   '-L<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm',
+                 ],
+               },
+             ],
             ],
             'sources': [
             ],
@@ -77,6 +103,15 @@
               '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libimc_syscalls.a',
               '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/lib32/libgio.a',
             ],
+            'extra_deps_arm': [
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libppruntime.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libirt_browser.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libsrpc.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libplatform.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libimc_syscalls.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libgio.a',
+              '<(SHARED_INTERMEDIATE_DIR)/tc_newlib/libarm/libpthread.a',
+            ],
           },
           'dependencies': [
             'src/shared/ppapi_proxy/ppapi_proxy_untrusted.gyp:ppruntime_lib',
@@ -84,6 +119,7 @@
             '../../native_client/src/shared/srpc/srpc.gyp:srpc_lib',
             '../../native_client/src/shared/platform/platform.gyp:platform_lib',
             '../../native_client/src/untrusted/nacl/nacl.gyp:imc_syscalls_lib',
+            '../../native_client/src/untrusted/pthread/pthread.gyp:pthread_lib',
             '../../native_client/src/shared/gio/gio.gyp:gio_lib',
           ],
         },