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
*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 *
*__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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