Hi there,
I hope this is a simple question. I'm working with v8 version 8.2.297.1.
And I would like to use the system libc++ from /usr/lib/llvm-10 and not the
one bundled with v8.
My args look like this:
# cat out/x64.release/args.gn
is_component_build = false
is_debug = false
target_cpu = "x64"
use_goma = false
goma_dir = "None"
v8_enable_backtrace = true
v8_enable_disassembler = true
v8_enable_object_print = true
v8_enable_verify_heap = true
v8_enable_embedded_builtins = false
v8_use_external_startup_data = false
v8_use_snapshot = false
*use_custom_libcxx = false*
is_clang = true
v8_monolithic = true
My motivation is that with *use_comst_libcxx* set to *true* I experienced
some conflicts with other libraries that link against the system libc++.
That's why I wanted to set this flag to *false*, but I think in that case
it's falling back to glibc++ ?
nm -C /opt/cppse/build/v8pp/lib/libv8_monolith.a | grep
v8::platform::NewDefaultPlatform
0000000000000000 T v8::platform::NewDefaultPlatform(int,
v8::platform::IdleTaskSupport, v8::platform::InProcessStackDumping,
std::unique_ptr<v8::TracingController,
std::default_delete<v8::TracingController> >)
I am expecting something like:
0000000000000000 T v8::platform::NewDefaultPlatform(int,
v8::platform::IdleTaskSupport, v8::platform::InProcessStackDumping,
std::__1::unique_ptr<v8::TracingController,
std::__1::default_delete<v8::TracingController> >)
If I create a component built, I can also see it seems it's not using
libc++:
root@79ce32aeae6f:/mnt2/NAS/projects/build-config/v8pp/v8# ldd
./out/x64.release/libv8.so
linux-vdso.so.1 (0x00007fff65bed000)
libicui18n.so =>
/mnt2/NAS/projects/build-config/v8pp/v8/./out/x64.release/libicui18n.so
(0x00007f2f84bc4000)
libicuuc.so =>
/mnt2/NAS/projects/build-config/v8pp/v8/./out/x64.release/libicuuc.so
(0x00007f2f84a02000)
libv8_libbase.so =>
/mnt2/NAS/projects/build-config/v8pp/v8/./out/x64.release/libv8_libbase.so
(0x00007f2f849e0000)
libchrome_zlib.so =>
/mnt2/NAS/projects/build-config/v8pp/v8/./out/x64.release/libchrome_zlib.so
(0x00007f2f849c2000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0
(0x00007f2f8479d000)
librt.so.1 => /lib/x86_64-linux-gnu/librt.so.1 (0x00007f2f84595000)
libstdc++.so.6 => */usr/lib/x86_64-linux-gnu/libstdc++.so.6*
(0x00007f2f8420a000)
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f2f83e6c000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f2f83a7b000)
/lib64/ld-linux-x86-64.so.2 (0x000055d51e2ae000)
libgcc_s.so.1 => /lib/x86_64-linux-gnu/libgcc_s.so.1
(0x00007f2f83863000)
Here I would like to have seen:
/usr/lib/llvm-10/lib/libc++abi.so.1.0
/usr/lib/llvm-10/lib/libc++.so.1.0
It is not clear to me after googling and trying to understand how this GN
stuff works what I could do to achieve this?
Is it supported at all?
Thanks in advance,
Ray
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