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Update README.Linux.md common pitfalls

* recent V8 versions need to be compiled with snnapshot=off to be usable
* use more meaningful destination path
This commit is contained in:
Stefan Siegl 2015-08-19 10:46:48 +02:00
parent 94fb367b15
commit e07ea80805

View File

@ -28,8 +28,8 @@ cd v8
git checkout 3.32.6
gclient sync
# Build
make native library=shared -j8
# Build (disable snapshots for V8 > 4.4.9.1)
make native library=shared snapshot=off -j8
# Install to /usr
sudo mkdir -p /usr/lib /usr/include
@ -38,13 +38,16 @@ sudo cp -R include/* /usr/include
echo -e "create /usr/lib/libv8_libplatform.a\naddlib out/native/obj.target/tools/gyp/libv8_libplatform.a\nsave\nend" | sudo ar -M
```
If you don't want to overwrite the system copy of v8, replace `/usr` in
the above commands with `/tmp/v8-install` and then add
`--with-v8js=/tmp/v8-install` to the php-v8js `./configure` command below.
If you do that with a v8 library of 4.2 branch or newer, then you need
to fix the RUNPATH header in the v8js.so library so the libicui18n.so
is found. By default it is set to `$ORIGIN/lib.target/`, however the files
lie side by side. Use `chrpath -r '$ORIGIN' libv8.so` to fix.
* If the V8 library is newer than 4.4.9.1 you need to pass `snapshot=off` to
`make`, otherwise the V8 library will not be usable
(see V8 [Issue 4192](https://code.google.com/p/v8/issues/detail?id=4192))
* If you don't want to overwrite the system copy of v8, replace `/usr` in
the above commands with some other path like `/opt/v8` and then add
`--with-v8js=/opt/v8` to the php-v8js `./configure` command below.
* If you do that with a v8 library of 4.2 branch or newer, then you need
to fix the RUNPATH header in the v8js.so library so the libicui18n.so
is found. By default it is set to `$ORIGIN/lib.target/`, however the files
lie side by side. Use `chrpath -r '$ORIGIN' libv8.so` to fix.
`libv8_libplatform.a` should not be copied directly since it's a thin
archive, i.e. it contains only pointers to the build objects, which