Use the ARM assembly code in mpi_arm.c for iOS.

nss/nss.gyp

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     'conditions': [
       ['OS=="ios"', {
         'exclude_nss_root_certs%': 0,
         'exclude_nss_libpkix%': 0,
@@ skipping 522 matching lines @@
         'mozilla/security/nss/lib/dev/nssdevt.h',
         'mozilla/security/nss/lib/freebl/aeskeywrap.c',
         'mozilla/security/nss/lib/freebl/alg2268.c',
         'mozilla/security/nss/lib/freebl/alghmac.c',
         'mozilla/security/nss/lib/freebl/alghmac.h',
         'mozilla/security/nss/lib/freebl/arcfive.c',
         'mozilla/security/nss/lib/freebl/arcfour.c',
         'mozilla/security/nss/lib/freebl/blapi.h',
         'mozilla/security/nss/lib/freebl/blapii.h',
         'mozilla/security/nss/lib/freebl/blapit.h',
+        'mozilla/security/nss/lib/freebl/build_config_mac.h',
         'mozilla/security/nss/lib/freebl/camellia.c',
         'mozilla/security/nss/lib/freebl/camellia.h',
         'mozilla/security/nss/lib/freebl/ctr.c',
         'mozilla/security/nss/lib/freebl/ctr.h',
         'mozilla/security/nss/lib/freebl/cts.c',
         'mozilla/security/nss/lib/freebl/cts.h',
         'mozilla/security/nss/lib/freebl/des.c',
         'mozilla/security/nss/lib/freebl/des.h',
         'mozilla/security/nss/lib/freebl/desblapi.c',
         'mozilla/security/nss/lib/freebl/dh.c',
@@ skipping 22 matching lines @@
         'mozilla/security/nss/lib/freebl/jpake.c',
         'mozilla/security/nss/lib/freebl/md2.c',
         'mozilla/security/nss/lib/freebl/md5.c',
         'mozilla/security/nss/lib/freebl/mpi/logtab.h',
         'mozilla/security/nss/lib/freebl/mpi/mpcpucache.c',
         'mozilla/security/nss/lib/freebl/mpi/mpi-config.h',
         'mozilla/security/nss/lib/freebl/mpi/mpi-priv.h',
         'mozilla/security/nss/lib/freebl/mpi/mpi.c',
         'mozilla/security/nss/lib/freebl/mpi/mpi.h',
         'mozilla/security/nss/lib/freebl/mpi/mpi_amd64.c',
+        'mozilla/security/nss/lib/freebl/mpi/mpi_arm.c',
+        'mozilla/security/nss/lib/freebl/mpi/mpi_arm_mac.c',
         'mozilla/security/nss/lib/freebl/mpi/mpi_x86_asm.c',
         'mozilla/security/nss/lib/freebl/mpi/mplogic.c',
         'mozilla/security/nss/lib/freebl/mpi/mplogic.h',
         'mozilla/security/nss/lib/freebl/mpi/mpmontg.c',
         'mozilla/security/nss/lib/freebl/mpi/mpprime.c',
         'mozilla/security/nss/lib/freebl/mpi/mpprime.h',
         'mozilla/security/nss/lib/freebl/mpi/mp_gf2m-priv.h',
         'mozilla/security/nss/lib/freebl/mpi/mp_gf2m.c',
         'mozilla/security/nss/lib/freebl/mpi/mp_gf2m.h',
         'mozilla/security/nss/lib/freebl/mpi/primes.c',
@@ skipping 344 matching lines @@
         'mozilla/security/nss/lib/util/templates.c',
         'mozilla/security/nss/lib/util/utf8.c',
         'mozilla/security/nss/lib/util/utilmod.c',
         'mozilla/security/nss/lib/util/utilmodt.h',
         'mozilla/security/nss/lib/util/utilpars.c',
         'mozilla/security/nss/lib/util/utilpars.h',
         'mozilla/security/nss/lib/util/utilparst.h',
         'mozilla/security/nss/lib/util/utilrename.h',
       ],
       'sources!': [
+        # mpi_arm.c is included by mpi_arm_mac.c.
+        # NOTE: mpi_arm.c can be used directly on Linux. mpi_arm.c will need
+        # to be excluded conditionally if we start to build NSS on Linux.
+        'mozilla/security/nss/lib/freebl/mpi/mpi_arm.c',
         # primes.c is included by mpprime.c.
         'mozilla/security/nss/lib/freebl/mpi/primes.c',
         # unix_rand.c and win_rand.c are included by sysrand.c.
         'mozilla/security/nss/lib/freebl/unix_rand.c',
         'mozilla/security/nss/lib/freebl/win_rand.c',
         # debug_module.c is included by pk11load.c.
         'mozilla/security/nss/lib/pk11wrap/debug_module.c',
       ],
       'dependencies': [
         'nspr',
@@ skipping 90 matching lines @@
           ],
           'sources!': [
             'mozilla/security/nss/lib/certhigh/certvfypkix.c',
             'mozilla/security/nss/lib/certhigh/certvfypkixprint.c',
           ],
           'include_dirs/': [
             ['exclude', '^mozilla/security/nss/lib/libpkix/'],
           ],
         }],
         ['target_arch=="ia32"', {
-          'sources/': [
-            ['exclude', 'amd64'],
+          'sources!': [
+            'mozilla/security/nss/lib/freebl/mpi/mpi_amd64.c',
           ],
         }],
         ['OS=="mac" or OS=="ios"', {
           'defines': [
             'XP_UNIX',
             'DARWIN',
             'HAVE_STRERROR',
             'HAVE_BSD_FLOCK',
             'SHLIB_SUFFIX=\"dylib\"',
             'SHLIB_PREFIX=\"lib\"',
             'SOFTOKEN_LIB_NAME=\"libsoftokn3.dylib\"',
           ],
           'sources!': [
             'mozilla/security/nss/lib/freebl/mpi/mpi_amd64.c',
-            'mozilla/security/nss/lib/freebl/mpi/mpi_x86_asm.c',
           ],
+          'variables': {
+            'forced_include_file': '<(DEPTH)/third_party/nss/mozilla/security/nss/lib/freebl/build_config_mac.h',
+          },
           'xcode_settings': {
             'conditions': [
               ['component == "shared_library"', {
                 'GCC_SYMBOLS_PRIVATE_EXTERN': 'NO',  # no -fvisibility=hidden
               }],
             ],
-            # Can't use 'target_arch=="ia32"' conditional because that is
-            # only checked at GYP file generation time.
-            'GCC_PREPROCESSOR_DEFINITIONS[arch=i386]': [
-              '$(inherited)',
-              'NSS_X86_OR_X64',
-              'NSS_X86',
-              'i386',
-            ],
-            'GCC_PREPROCESSOR_DEFINITIONS[arch=x86_64]': [
-              '$(inherited)',
-              'NSS_USE_64',
-              'NSS_X86_OR_X64',
-              'NSS_X64',
+            # Define processor architecture specific macros in
+            # <(forced_include_file).
+            'OTHER_CFLAGS': [
+              '-include', '<(forced_include_file)',
             ],
           },
+        }, { # else: OS!="mac" and OS!="ios"
+          'sources!': [
+            'mozilla/security/nss/lib/freebl/mpi/mpi_arm_mac.c',
+          ],
         }],
         ['OS=="win"', {
           'defines': [
             'SHLIB_SUFFIX=\"dll\"',
             'SHLIB_PREFIX=\"\"',
             'SOFTOKEN_LIB_NAME=\"softokn3.dll\"',
             'XP_PC',
             'WIN32',
             'WIN95',
             '_WINDOWS',
@@ skipping 22 matching lines @@
                 'NSS_X86_OR_X64',
                 'NSS_X64',
                 'WIN64',
               ],
               'sources!': [
                 'mozilla/security/nss/lib/freebl/mpi/mpi_amd64.c',
                 'mozilla/security/nss/lib/freebl/mpi/mpi_x86_asm.c',
               ],
             }],
           ],
+        }, { # else: OS!="win"
+          'sources!': [
+            # mpi_x86_asm.c contains MSVC inline assembly code.
+            'mozilla/security/nss/lib/freebl/mpi/mpi_x86_asm.c',
+          ],
         }],
         ['clang==1', {
           'xcode_settings': {
             'WARNING_CFLAGS': [
               # nss doesn't explicitly cast between different enum types.
               '-Wno-conversion',
               # nss passes "const char*" through "void*".
               '-Wno-incompatible-pointer-types',
               # nss prefers `a && b || c` over `(a && b) || c`.
               '-Wno-logical-op-parentheses',
               # nss doesn't use exhaustive switches on enums
               '-Wno-switch',
               # nss has some `unsigned < 0` checks.
               '-Wno-tautological-compare',
             ],
           },
           'cflags': [
             '-Wno-conversion',
             '-Wno-incompatible-pointer-types',
             '-Wno-logical-op-parentheses',
             '-Wno-switch',
             '-Wno-tautological-compare',
           ],
         }],
       ],
     },
   ],
 }