Is "monolithic" build of v8 for static linking incompatible with "v8_use_snapshot=true"?

[Ben Ernst]

Following some frustrations with dynamic linking to V8, I thought I'd try the static linked build.

My platform is VS2017, Windows 10.

My arguments to "gn" (via "v8gen") are as follows:

treat_warnings_as_errors=false

is_component_build=false

v8_enable_i18n_support=false

v8_use_snapshot=true

v8_monolithic=true

When I try to build V8, I get this error:

     [exec] **********************************************************************

     [exec] ** Visual Studio 2017 Developer Command Prompt v15.9.11

     [exec] ** Copyright (c) 2017 Microsoft Corporation

     [exec] **********************************************************************

     [exec] [vcvarsall.bat] Environment initialized for: 'x64'

     [exec] ninja: Entering directory `out.gn/x64.release'

     [exec] [1/1] Regenerating ninja files

     [exec] FAILED: build.ninja

     [exec] ../../buildtools/win/gn.exe --root=../.. -q --check gen .

     [exec] ERROR at //BUILD.gn:3779:3: Assertion failed.

     [exec]   assert(!v8_use_external_startup_data)

     [exec]   ^-----

     [exec] ninja: error: rebuilding 'build.ninja': subcommand failed

Is "v8_monolith" incompatible with "v8_use_snapshot"? How does one get around this problem?

[Jakob Gruber]

Set 

v8_use_external_startup_data = false

to compile the snapshot into the binary. I don't think there's any reason external snapshots would not work in monolithic builds. The assert is likely guarding the fact that the build produces exactly one single file.

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[Ben Ernst]

Thank you Jakob, it built successfully with your change, now I just have to link to it.

To view this discussion on the web visit https://groups.google.com/d/msgid/v8-users/CAH3p7oPKpFHd7xBtmuoS6Pj_jhcXSVTBTCPMO-qnDhAsiE0trQ%40mail.gmail.com.

[Ben Ernst]

Jakob, your tip has helped, thank you. That flag seemed to do the trick.

Ben