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@@ -10,7 +10,23 @@ years ago, since Node.js requires such an old version.
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This means that you usually need to compile v8 on your own before
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you can start to compile & install v8js itself.
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-Compile latest v8
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+Snapshots
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+---------
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+
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+V8 has (optional) support for so-called snapshots which speed up startup
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+performance drastically. Hence they are generally recommended for use.
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+
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+There are two flavours of snapshots: internal & external.
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+
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+Internal snapshots are built right into the V8 library (libv8.so file),
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+so there's no need to handle them specially.
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+
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+Besides there are external snapshots (which are enabled unless configured
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+otherwise). If V8 is compiled with these, then V8Js needs to provide two
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+"binary blobs" to V8, named `natives_blob.bin` and `snapshot_blob.bin`.
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+In that case copy those two files to `/usr/share/v8/...`.
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+
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+Compile latest V8
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-----------------
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```
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@@ -25,11 +41,15 @@ fetch v8
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cd v8
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# (optional) If you'd like to build a certain version:
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-git checkout 3.32.6
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+git checkout 4.9.385.28
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gclient sync
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-# Build (disable snapshots for V8 > 4.4.9.1)
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-make native library=shared snapshot=off -j8
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+# use libicu of operating system
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+export GYP_DEFINES="use_system_icu=1"
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+
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+# Build (with internal snapshots)
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+export GYPFLAGS="-Dv8_use_external_startup_data=0"
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+make native library=shared snapshot=on -j8
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# Install to /usr
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sudo mkdir -p /usr/lib /usr/include
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@@ -40,16 +60,9 @@ echo -e "create /usr/lib/libv8_libplatform.a\naddlib out/native/obj.target/tools
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Then add `extension=v8js.so` to your php.ini file. If you have a separate configuration for CLI, add it there also.
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-* If the V8 library is newer than 4.4.9.1 you need to pass `snapshot=off` to
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- `make`, otherwise the V8 library will not be usable
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- (see V8 [Issue 4192](https://code.google.com/p/v8/issues/detail?id=4192))
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* If you don't want to overwrite the system copy of v8, replace `/usr` in
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the above commands with some other path like `/opt/v8` and then add
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`--with-v8js=/opt/v8` to the php-v8js `./configure` command below.
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-* If you do that with a v8 library of 4.2 branch or newer, then you need
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- to fix the RUNPATH header in the v8js.so library so the libicui18n.so
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- is found. By default it is set to `$ORIGIN/lib.target/`, however the files
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- lie side by side. Use `chrpath -r '$ORIGIN' libv8.so` to fix.
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`libv8_libplatform.a` should not be copied directly since it's a thin
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archive, i.e. it contains only pointers to the build objects, which
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@@ -62,7 +75,7 @@ Compile php-v8js itself
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```
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cd /tmp
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-git clone https://github.com/preillyme/v8js.git
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+git clone https://github.com/phpv8/v8js.git
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cd v8js
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phpize
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./configure
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Stefan Siegl