PNaCl driver: Add libgcc to mixed native/bitcode links

tests/toolchain/nacl.scons

Index: tests/toolchain/nacl.scons
diff --git a/tests/toolchain/nacl.scons b/tests/toolchain/nacl.scons
index bc92a6087deb166ede62ab7ef5f16a683053e212..361e1e52227157518fec9cb8c68de069d841c680 100644
--- a/tests/toolchain/nacl.scons
+++ b/tests/toolchain/nacl.scons
@@ -552,3 +552,24 @@ nexe = env.ComponentProgram('wrap', ['wrap_main.c'],
 node = env.CommandSelLdrTestNacl('wrap.out', nexe,
                                  stdout_golden=env.File('wrap.stdout'))
 env.AddNodeToTestSuite(node, ['toolchain_tests','small_tests'], 'run_wrap_test')
+
+if (env.Bit('target_x86_32') and env.Bit('bitcode') and
+    not env.Bit('pnacl_generate_pexe') and
+    env['TOOLCHAIN_FEATURE_VERSION'] >= 7):
+  # This test compiles a file that will need to generate a call to a compiler-rt
+  # function (__udivdi3) on x86-32. Ensure that when we pre-translate to a
+  # native object file, libgcc is included in the bitcode link to satisfy the
+  # reference.
+  mixedlink_env = env.Clone()
+  mixedlink_env.Append(CCFLAGS=['--pnacl-allow-translate',
+                                '--pnacl-allow-native',
+                                '-arch', 'x86-32'])
+  mixedlink_env.Append(LINKFLAGS=['--pnacl-allow-translate',
+                                  '--pnacl-allow-native',
+                                  '-arch', 'x86-32'])
+  nexe = mixedlink_env.ComponentProgram('libgcc_mixed_link', 'needs_libgcc.c',
+                                        EXTRA_LIBS=['${NONIRT_LIBS}'])
+  node = mixedlink_env.CommandSelLdrTestNacl('libgcc_mixed_link.out', nexe,
+                                             ['9', '3'])
+  mixedlink_env.AddNodeToTestSuite(node, ['nonpexe_tests', 'small_tests'],
+                                   'run_libgcc_mixed_link_test')