build: add --shared-highway configure flag

.github/workflows/test-shared.yml

@@ -33,6 +33,7 @@ on:
       - deps/sqlite/**
       - deps/uv/**
       - deps/uvwasi/**
+      - deps/v8/third_party/highway/**
       - deps/zlib/**
       - deps/zstd/**
       - doc/**
@@ -86,6 +87,7 @@ on:
       - deps/sqlite/**
       - deps/uv/**
       - deps/uvwasi/**
+      - deps/v8/third_party/highway/**
       - deps/zlib/**
       - deps/zstd/**
       - doc/**

Makefile

@@ -1316,6 +1316,7 @@ ifeq ($(SKIP_SHARED_DEPS), 1)
 	$(RM) -r $(TARNAME)/deps/sqlite
 	$(RM) -r $(TARNAME)/deps/uv
 	$(RM) -r $(TARNAME)/deps/uvwasi
+	$(RM) -r $(TARNAME)/deps/v8/third_party/highway
 	$(RM) -r $(TARNAME)/deps/zlib
 	$(RM) -r $(TARNAME)/deps/zstd
 else

configure.py

@@ -326,6 +326,28 @@
     dest='shared_hdr_histogram_libpath',
     help='a directory to search for the shared HdrHistogram DLL')
 
+shared_optgroup.add_argument('--shared-highway',
+    action='store_true',
+    dest='shared_highway',
+    default=None,
+    help='link to a shared Highway (hwy) DLL instead of static linking')
+
+shared_optgroup.add_argument('--shared-highway-includes',
+    action='store',
+    dest='shared_highway_includes',
+    help='directory containing Highway header files')
+
+shared_optgroup.add_argument('--shared-highway-libname',
+    action='store',
+    dest='shared_highway_libname',
+    default='hwy',
+    help='alternative lib name to link to [default: %(default)s]')
+
+shared_optgroup.add_argument('--shared-highway-libpath',
+    action='store',
+    dest='shared_highway_libpath',
+    help='a directory to search for the shared Highway DLL')
+
 shared_optgroup.add_argument('--shared-http-parser',
     action='store_true',
     dest='shared_http_parser',
@@ -2821,6 +2843,7 @@ def make_bin_override():
 configure_library('cares', output, pkgname='libcares')
 configure_library('gtest', output)
 configure_library('hdr_histogram', output)
+configure_library('highway', output, pkgname='libhwy')
 configure_library('merve', output)
 configure_library('nbytes', output)
 configure_library('nghttp2', output, pkgname='libnghttp2')

node.gyp

@@ -19,6 +19,7 @@
     'node_shared_cares%': 'false',
     'node_shared_gtest%': 'false',
     'node_shared_hdr_histogram%': 'false',
+    'node_shared_highway%': 'false',
     'node_shared_http_parser%': 'false',
     'node_shared_libuv%': 'false',
     'node_shared_lief%': 'false',

shell.nix

@@ -63,6 +63,7 @@ let
     ];
   buildInputs =
     pkgs.lib.optional useSharedICU icu
+    ++ pkgs.lib.optional (builtins.hasAttr "highway" sharedLibDeps) sharedLibDeps.highway
     ++ pkgs.lib.optional (withTemporal && useSharedTemporal) sharedLibDeps.temporal_capi;
 
   # Put here only the configure flags that affect the V8 build
@@ -75,6 +76,7 @@ let
     )
     "--v8-${if withTemporal then "enable" else "disable"}-temporal-support"
   ]
+  ++ pkgs.lib.optional (builtins.hasAttr "highway" sharedLibDeps) "--shared-highway"
   ++ pkgs.lib.optional (withTemporal && useSharedTemporal) "--shared-temporal_capi"
   ++ pkgs.lib.optional withPerfetto "--with-perfetto";
 in
@@ -132,6 +134,7 @@ pkgs.mkShell {
             builtins.attrNames (
               if (useSeparateDerivationForV8 != false) then
                 builtins.removeAttrs sharedLibDeps [
+                  "highway"
                   "simdutf"
                   "temporal_capi"
                 ]

tools/nix/sharedLibDeps.nix

@@ -23,6 +23,7 @@
     ;
   cares = pkgs.c-ares;
   hdr-histogram = pkgs.hdrhistogram_c;
+  highway = pkgs.libhwy;
   http-parser = pkgs.llhttp;
   nghttp2 = pkgs.nghttp2.overrideAttrs {
     version = "1.69.0";

tools/nix/v8.nix

@@ -23,6 +23,7 @@
 }:
 
 let
+  useSharedHighway = builtins.elem "--shared-highway" configureFlags;
   src =
     let
       inherit (lib) fileset;
@@ -63,12 +64,15 @@ let
       potentiallyAlreadyRemovedFiles =
         # Files that are removed in the release tarball (see Makefile $(TARBALL) target)
         [ (fileset.difference ../../deps/v8/test ../../deps/v8/test/torque) ]
-        ++ (builtins.filter builtins.pathExists [
-          ../../deps/v8/samples
-          ../../deps/v8/tools/profviz
-          ../../deps/v8/tools/run-tests.py
-          ../../deps/v8/third_party/ittapi
-        ]);
+        ++ (builtins.filter builtins.pathExists (
+          [
+            ../../deps/v8/samples
+            ../../deps/v8/tools/profviz
+            ../../deps/v8/tools/run-tests.py
+            ../../deps/v8/third_party/ittapi
+          ]
+          ++ lib.optional useSharedHighway ../../deps/v8/third_party/highway
+        ));
       trackedFiles =
         ({
           # This line is being modified by Makefile $(TARBALL) target, any change to it should be sync

tools/v8_gypfiles/v8.gyp

@@ -2444,10 +2444,35 @@
       'target_name': 'highway',
       'type': 'static_library',
       'toolsets': ['host', 'target'],
-      'variables': {
-        'HIGHWAY_ROOT': '../../deps/v8/third_party/highway',
-      },
-      'all_dependent_settings': {
+      'conditions': [['node_shared_highway=="false"', {
+        'variables': {
+          'HIGHWAY_ROOT': '../../deps/v8/third_party/highway',
+        },
+        'all_dependent_settings': {
+          'include_dirs': [
+            '<(HIGHWAY_ROOT)/src',
+          ],
+          'conditions': [
+            ['v8_target_arch=="ia32"', {
+              'defines': ['HWY_BROKEN_TARGETS=(HWY_AVX2|HWY_AVX3)',],
+            }],
+            ['v8_target_arch=="arm64"', {
+              'defines': ['HWY_BROKEN_TARGETS=HWY_ALL_SVE',],
+            }],
+            ['v8_target_arch=="ppc64" or v8_target_arch=="s390x"', {
+              'defines': ['TOOLCHAIN_MISS_ASM_HWCAP_H',],
+            }],
+            ['v8_target_arch=="s390x"', {
+              'defines': ['HWY_BROKEN_EMU128=0',],
+            }],
+            ['OS in "aix os400"', {
+              'defines': ['HWY_BROKEN_EMU128=0',],
+            }],
+            ['v8_target_arch=="arm" and arm_version==7', {
+              'defines': ['HWY_BROKEN_EMU128=0',],
+            }],
+          ],
+        },
         'include_dirs': [
           '<(HIGHWAY_ROOT)/src',
         ],
@@ -2461,34 +2486,11 @@
           ['v8_target_arch=="ppc64" or v8_target_arch=="s390x"', {
             'defines': ['TOOLCHAIN_MISS_ASM_HWCAP_H',],
           }],
-          ['v8_target_arch=="s390x"', {
-            'defines': ['HWY_BROKEN_EMU128=0',],
-          }],
-          ['OS in "aix os400"', {
-            'defines': ['HWY_BROKEN_EMU128=0',],
-          }],
-          ['v8_target_arch=="arm" and arm_version==7', {
-            'defines': ['HWY_BROKEN_EMU128=0',],
-          }],
         ],
-      },
-      'include_dirs': [
-        '<(HIGHWAY_ROOT)/src',
-      ],
-      'conditions': [
-        ['v8_target_arch=="ia32"', {
-          'defines': ['HWY_BROKEN_TARGETS=(HWY_AVX2|HWY_AVX3)',],
-        }],
-        ['v8_target_arch=="arm64"', {
-          'defines': ['HWY_BROKEN_TARGETS=HWY_ALL_SVE',],
-        }],
-        ['v8_target_arch=="ppc64" or v8_target_arch=="s390x"', {
-          'defines': ['TOOLCHAIN_MISS_ASM_HWCAP_H',],
-        }],
-      ],
-      'sources': [
-        '<!@pymod_do_main(GN-scraper "<(HIGHWAY_ROOT)/BUILD.gn"  "source_set.\\"libhwy.*?sources = ")',
-      ],
+        'sources': [
+          '<!@pymod_do_main(GN-scraper "<(HIGHWAY_ROOT)/BUILD.gn"  "source_set.\\"libhwy.*?sources = ")',
+        ],
+      }]],
     },  # highway
     {
       'target_name': 'simdutf',