build: remove mips support

Upstream V8 is dropping support for mips/mipsel/mips64/mips64el.
This commit removes the build flags from the configure script
and some loose ends from the documentation.

PR-URL: nodejs#26192
Fixes: nodejs#26179
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Yang Guo <yangguo@chromium.org>
Reviewed-By: Refael Ackermann <refack@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>

configure.py

@@ -45,13 +45,10 @@
 
 valid_os = ('win', 'mac', 'solaris', 'freebsd', 'openbsd', 'linux',
             'android', 'aix', 'cloudabi')
-valid_arch = ('arm', 'arm64', 'ia32', 'mips', 'mipsel', 'mips64el', 'ppc',
+valid_arch = ('arm', 'arm64', 'ia32', 'ppc',
               'ppc64', 'x32','x64', 'x86', 'x86_64', 's390', 's390x')
 valid_arm_float_abi = ('soft', 'softfp', 'hard')
 valid_arm_fpu = ('vfp', 'vfpv3', 'vfpv3-d16', 'neon')
-valid_mips_arch = ('loongson', 'r1', 'r2', 'r6', 'rx')
-valid_mips_fpu = ('fp32', 'fp64', 'fpxx')
-valid_mips_float_abi = ('soft', 'hard')
 valid_intl_modes = ('none', 'small-icu', 'full-icu', 'system-icu')
 with open ('tools/icu/icu_versions.json') as f:
   icu_versions = json.load(f)
@@ -368,30 +365,6 @@
     help='ARM FPU mode ({0}) [default: %default]'.format(
         ', '.join(valid_arm_fpu)))
 
-parser.add_option('--with-mips-arch-variant',
-    action='store',
-    dest='mips_arch_variant',
-    default='r2',
-    choices=valid_mips_arch,
-    help='MIPS arch variant ({0}) [default: %default]'.format(
-        ', '.join(valid_mips_arch)))
-
-parser.add_option('--with-mips-fpu-mode',
-    action='store',
-    dest='mips_fpu_mode',
-    default='fp32',
-    choices=valid_mips_fpu,
-    help='MIPS FPU mode ({0}) [default: %default]'.format(
-        ', '.join(valid_mips_fpu)))
-
-parser.add_option('--with-mips-float-abi',
-    action='store',
-    dest='mips_float_abi',
-    default='hard',
-    choices=valid_mips_float_abi,
-    help='MIPS floating-point ABI ({0}) [default: %default]'.format(
-        ', '.join(valid_mips_float_abi)))
-
 parser.add_option('--with-dtrace',
     action='store_true',
     dest='with_dtrace',
@@ -851,8 +824,6 @@ def host_arch_cc():
     '__aarch64__' : 'arm64',
     '__arm__'     : 'arm',
     '__i386__'    : 'ia32',
-    '__MIPSEL__'  : 'mipsel',
-    '__mips__'    : 'mips',
     '__PPC64__'   : 'ppc64',
     '__PPC__'     : 'ppc64',
     '__x86_64__'  : 'x64',
@@ -868,9 +839,6 @@ def host_arch_cc():
       if rtn != 's390':
         break
 
-  if rtn == 'mipsel' and '_LP64' in k:
-    rtn = 'mips64el'
-
   return rtn
 
 
@@ -884,7 +852,6 @@ def host_arch_win():
     'AMD64'  : 'x64',
     'x86'    : 'ia32',
     'arm'    : 'arm',
-    'mips'   : 'mips',
   }
 
   return matchup.get(arch, 'ia32')
@@ -916,14 +883,6 @@ def configure_arm(o):
   o['variables']['arm_fpu'] = options.arm_fpu or arm_fpu
 
 
-def configure_mips(o):
-  can_use_fpu_instructions = (options.mips_float_abi != 'soft')
-  o['variables']['v8_can_use_fpu_instructions'] = b(can_use_fpu_instructions)
-  o['variables']['v8_use_mips_abi_hardfloat'] = b(can_use_fpu_instructions)
-  o['variables']['mips_arch_variant'] = options.mips_arch_variant
-  o['variables']['mips_fpu_mode'] = options.mips_fpu_mode
-
-
 def gcc_version_ge(version_checked):
   for compiler in [(CC, 'c'), (CXX, 'c++')]:
     ok, is_clang, clang_version, compiler_version = \
@@ -963,8 +922,6 @@ def configure_node(o):
 
   if target_arch == 'arm':
     configure_arm(o)
-  elif target_arch in ('mips', 'mipsel', 'mips64el'):
-    configure_mips(o)
 
   if flavor == 'aix':
     o['variables']['node_target_type'] = 'static_library'

doc/api/process.md

@@ -528,8 +528,8 @@ added: v0.5.0
 The `process.arch` property returns a string identifying the operating system
 CPU architecture for which the Node.js binary was compiled.
 
-The current possible values are: `'arm'`, `'arm64'`, `'ia32'`, `'mips'`,
-`'mipsel'`, `'ppc'`, `'ppc64'`, `'s390'`, `'s390x'`, `'x32'`, and `'x64'`.
+The current possible values are: `'arm'`, `'arm64'`, `'ia32'`,
+`'ppc'`, `'ppc64'`, `'s390'`, `'s390x'`, `'x32'`, and `'x64'`.
 
 ```js
 console.log(`This processor architecture is ${process.arch}`);

doc/onboarding-extras.md

@@ -81,5 +81,5 @@ need to be attached anymore, as only important bugfixes will be included.
   * `macos`, `windows`, `smartos`, `aix`
   * No linux, linux is the implied default
 * Architecture labels
-  * `arm`, `mips`, `s390`, `ppc`
+  * `arm`, `s390`, `ppc`
   * No x86{_64}, since that is the implied default