Hello!
Could you please try to apply this patch https://crrev.com/c/6375266 and
add v8_monolithic_for_shared_library=true to your GN args?
On Thu, Mar 20, 2025 at 7:06 AM Pradish <pradis...@gmail.com> wrote:
> I am able to build V8 as a static library using the following args.gn
>
> *V8 Version: 13.4.114.19, *but when trying to link it statically with
> another shared libraray which is part of our application it is failing with
> errors
>
>
> On Linux RHEL 8
>
> the args.gn used is
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> *v8_static_library = true is_component_build = false is_debug = false
> target_cpu = "x64" use_custom_libcxx = false v8_monolithic = true
> v8_use_external_startup_data = false is_clang = false
> clang_use_chrome_plugins = false treat_warnings_as_errors = false
> v8_enable_fast_torque = false v8_enable_sandbox = false v8_enable_backtrace
> = false v8_enable_disassembler = false v8_enable_object_print = false
> v8_enable_verify_heap = false dcheck_always_on = false
> v8_enable_i18n_support = false use_sysroot = false v8_enable_webassembly =
> false*
>
> *Errors:*
> *release/libv8_monolith.a(api.o): relocation R_X86_64_TPOFF32 against
> symbol `_ZN2v88internal18g_current_isolate_E' can not be used when making a
> shared object; recompile with -fPIC*
>
>
> * /release/libv8_monolith.a(isolate.o): relocation R_X86_64_TPOFF32
> against symbol `_ZN2v88internal21g_current_local_heap_E' can not be used
> when making a shared object; recompile with -fPIC*
>
> on further exploring the errors, we found that this declaration in the
> isolate.h is causing the issue
>
> * in isolate.h*
>
> it is declared as
>
> __attribute__((tls_model(V8_TLS_MODEL))) extern thread_local Isolate*
> g_current_isolate_ V8_CONSTINIT;
>
> *in Isolate.cc*
>
> thread_local Isolate::PerIsolateThreadData*
> g_current_per_isolate_thread_data_
> V8_CONSTINIT = nullptr;
>
> thread_local Isolate* g_current_isolate_ V8_CONSTINIT = nullptr;
>
>
>
> After some google , i changed the code to the following
>
> *in Isolate.h*
> * __attribute__((tls_model("global-dynamic"))) extern thread_local
> Isolate* g_current_isolate_ V8_CONSTINIT;*
>
>
> *in isolate.cc *
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> *__attribute__((tls_model("global-dynamic")))thread_local
> Isolate::PerIsolateThreadData* g_current_per_isolate_thread_data_
> V8_CONSTINIT =
> nullptr;__attribute__((tls_model("global-dynamic")))thread_local Isolate*
> g_current_isolate_ V8_CONSTINIT = nullptr;*
>
> Still no success.
>
> also note that this was working earlier when the V8 libraries where shared
> libraires , but after moveing to static this issue is seen
>
> can anyone share some pointers or a fix to resolve the issue.
>
> regards
>
> Pradish
>
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--
Igor Sheludko
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ish...@google.com
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