Thanks so much for the response, Ben! I think that may be the issue -- I'm trying to compile 13.0 and am trying to build with apple clang c++20, and it's just continually tripping up on itself. It seems that apple clang doesn't support enable_view.
I've since switched to trying to build 12.9 but I think I was still trying to build with c++20. Is there a way to specify within gn.args that c++17 should be used? I couldn't find a relevant flag in the list of available flags. Unless 12.9 is indeed c++20? I'm seeing -std=c++20 being passed in as an argument during the build (and I'm not passing it myself, so I'm guessing its coming from ninja or somewhere else in v8). Apologies for any ignorance on my part -- I've only recently started working with c++ so I'm not deeply familiar with the tooling. Cheers, Alex On Friday, September 20, 2024 at 4:53:30 AM UTC-4 Ben Noordhuis wrote: > On Thu, Sep 19, 2024 at 9:15 PM Alex Dovzhanyn <dovzhan...@gmail.com> > wrote: > > > > Hey all, I'm trying to follow the steps listed here in the V8 docs to > build V8 on OSX. > > > > gn args out.gn/x64.release.sample > > shows the generated arguments as: > > > > is_component_build = false > > is_debug = false > > target_cpu = "x64" > > use_custom_libcxx = false > > v8_monolithic = true > > v8_use_external_startup_data = false > > > > However, when I run ninja -C out.gn/x64.release.sample v8_monolith > > the build runs about halfway but ultimately fails with the following > error: > > > > In file included from ../../src/codegen/external-reference-table.h:8: > ../../include/v8-memory-span.h:44:36: error: no member named 'enable_view' > in namespace 'std::ranges' 44 | inline constexpr bool > std::ranges::enable_view<v8::MemorySpan<T>> = true; | ~~~~~~~~~~~~~^ > ../../include/v8-memory-span.h:44:47: error: expected ';' after top level > declarator 44 | inline constexpr bool > std::ranges::enable_view<v8::MemorySpan<T>> = true; | ^ | ; In file > included from ../../src/codegen/external-reference-table.cc:5: In file > included from ../../src/codegen/external-reference-table.h:9: In file > included from ../../src/builtins/accessors.h:9: In file included from > ../../src/base/bit-field.h:12: In file included from > ../../src/base/macros.h:13: In file included from > ../../src/base/logging.h:11: In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/sstream:184: > > In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/istream:163: > > In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/ostream:137: > > In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/bitset:122: > > In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/string:532: > > In file included from > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/string_view:191: > > ../../../../../../../../../Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX12.3.sdk/usr/include/c++/v1/__ranges/enable_view.h:32:23: > > error: redefinition of 'enable_view' 32 | inline constexpr bool enable_view > = derived_from<_Tp, view_base>; | ^ ../../include/v8-memory-span.h:44:36: > note: previous definition is here 44 | inline constexpr bool > std::ranges::enable_view<v8::MemorySpan<T>> = true; | ^ 3 errors generated. > > > > I am building on OSX 12.5 with Xcode 13.4 installed -- using Apple clang > version 13.1.6 (clang-1316.0.21.2.5). > > > > Any help would be very greatly appreciated! > > For building 13.0 or the main branch a C++20-capable compiler and > standard library are required; enable_view is a C++20-ism. Your > options are: > > 1. Set use_custom_libcxx=true and use the bundled libc++ (assuming > Xcode can handle C++20; I don't know) > > 2. Build an older version. I believe 12.9 is still C++17. > -- -- v8-users mailing list v8-users@googlegroups.com http://groups.google.com/group/v8-users --- You received this message because you are subscribed to the Google Groups "v8-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to v8-users+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/3b58ea5f-acfb-4440-abe5-f2571f060d1en%40googlegroups.com.
