v8 static library on windows gives linker errors

[Mike Moening]

Trying to get the latest version of V8 on windows to successfully link with my application.

I've got VC 2017 on a Windows 7 box.

I'm trying to build an x64 debug static library.

I've managed to get V8 to build but I'm running into the following linker errors:

1>v8_base_1.lib(isolate.obj) : error LNK2001: unresolved external symbol "public: virtual void __cdecl v8::internal::SetupIsolateDelegate::SetupBuiltins(class v8::internal::Isolate *)" (?SetupBuiltins@SetupIsolateDelegate@internal@v8@@UEAAXPEAVIsolate@23@@Z)

1>v8_base_1.lib(isolate.obj) : error LNK2001: unresolved external symbol "public: virtual bool __cdecl v8::internal::SetupIsolateDelegate::SetupHeap(class v8::internal::Heap *)" (?SetupHeap@SetupIsolateDelegate@internal@v8@@UEAA_NPEAVHeap@23@@Z)

My args.gn file looks like this:

is_debug = true

is_clang = false

v8_target_cpu = "x64"

target_cpu = "x64"

v8_enable_backtrace = true

v8_enable_slow_dchecks = true

v8_optimized_debug = false

is_component_build = false

v8_static_library = true

use_custom_libcxx = false

use_custom_libcxx_for_host = false

treat_warnings_as_errors = false

v8_enable_i18n_support = false

v8_use_external_startup_data = false

When the V8 build is complete I end up with no less than 36 separate .lib files being generated!

Of those 36 I link with the following in my app:

v8_base_0.lib

v8_base_1.lib

v8_libbase.lib

v8_libplatform.lib

v8_initializers.lib

v8_nosnapshot.lib

v8_libsampler.lib

I've tried removing and adding different v8 lib files in the hope of getting a clean link.

No such luck.

Any ideas as to why it's producing so many output .lib files or which ones I need to successfully link?

 

Mike M.

[Mike Moening]

Here's the build command i'm using:

ninja -C out.gn/x64.debug

[Mike Moening]

I tried linking in the v8_init.lib file to my project.

The same error still exists but under another library?

1>v8_init.lib(setup-isolate-full.obj) : error LNK2019: unresolved external symbol "protected: static void __cdecl v8::internal::SetupIsolateDelegate::SetupBuiltinsInternal(class v8::internal::Isolate *)" (?SetupBuiltinsInternal@SetupIsolateDelegate@internal@v8@@KAXPEAVIsolate@23@@Z) referenced in function "public: virtual void __cdecl v8::internal::SetupIsolateDelegate::SetupBuiltins(class v8::internal::Isolate *)" (?SetupBuiltins@SetupIsolateDelegate@internal@v8@@UEAAXPEAVIsolate@23@@Z)

1>v8_init.lib(setup-isolate-full.obj) : error LNK2019: unresolved external symbol "protected: static bool __cdecl v8::internal::SetupIsolateDelegate::SetupHeapInternal(class v8::internal::Heap *)" (?SetupHeapInternal@SetupIsolateDelegate@internal@v8@@KA_NPEAVHeap@23@@Z) referenced in function "public: virtual bool __cdecl v8::internal::SetupIsolateDelegate::SetupHeap(class v8::internal::Heap *)" (?SetupHeap@SetupIsolateDelegate@internal@v8@@UEAA_NPEAVHeap@23@@Z)

[Jakob Kummerow]

The set of required libraries should be:

v8_base

v8_snapshot

v8_libbase

v8_libplatform

v8_libsampler

Does that work?

As a simpler alternative, the instructions recommend to use the "v8_monolith" target, which should include everything you need in one convenient bundle.

On Sun, Oct 7, 2018 at 3:50 PM Mike Moening <mike.m...@gmail.com> wrote:

Here's the build command i'm using:

ninja -C out.gn/x64.debug

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[Mike Moening]

I like the idea of a single library.

I tried the following based on the instructions I saw:

ninja -C out.gn/x64.debug v8_monolith

but got this error:

ninja: Entering directory `out.gn/x64.debug'

ninja: error: unknown target 'v8_monolith'

[Mike Moening]

Did a little more googling and found this option for the args.gn file:

v8_monolithic = true

is_debug = true

is_clang = false

v8_target_cpu = "x64"

target_cpu = "x64"

v8_enable_backtrace = true

v8_enable_slow_dchecks = true

v8_optimized_debug = false

is_component_build = false

v8_static_library = true

use_custom_libcxx = false

use_custom_libcxx_for_host = false

treat_warnings_as_errors = false

v8_enable_i18n_support = false

v8_use_external_startup_data = false

Which is producing a single output file named: v8_monolith.lib

Which when linked with my application finally has no errors!

The v8_monolith.lib is unbelievably huge (nearly a gig) but at least it works.

[Jakob Kummerow]

The v8_monolith.lib is unbelievably huge (nearly a gig) 

That's probably mostly debug info. Try Release mode ("is_debug = false").