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frankenphp/docs/compile.md

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# Compile From Sources
This document explains how to create a FrankenPHP binary that will load PHP as a dynamic library.
This is the recommended method.
Alternatively, [fully and mostly static builds](static.md) can also be created.
## Install PHP
FrankenPHP is compatible with PHP 8.2 and superior.
### With Homebrew (Linux and Mac)
The easiest way to install a version of libphp compatible with FrankenPHP is to use the ZTS packages provided by [Homebrew PHP](https://github.com/shivammathur/homebrew-php).
First, if not already done, install [Homebrew](https://brew.sh).
Then, install the ZTS variant of PHP, Brotli (optional, for compression support) and watcher (optional, for file change detection):
```console
brew install shivammathur/php/php-zts brotli watcher
brew link --overwrite --force shivammathur/php/php-zts
```
### By Compiling PHP
Alternatively, you can compile PHP from sources with the options needed by FrankenPHP by following these steps.
~~
~~First, [get the PHP sources](https://www.php.net/downloads.php) and extract them:
```console
tar xf php-*
cd php-*/
```
Then, run the `configure` script with the options needed for your platform.
The following `./configure` flags are mandatory, but you can add others, for example, to compile extensions or additional features.
#### Linux
```console
./configure \
--enable-embed \
--enable-zts \
--disable-zend-signals \
--enable-zend-max-execution-timers
```
#### Mac
Use the [Homebrew](https://brew.sh/) package manager to install the required and optional dependencies:
```console
brew install libiconv bison brotli re2c pkg-config watcher
echo 'export PATH="/opt/homebrew/opt/bison/bin:$PATH"' >> ~/.zshrc
```
Then run the configure script:
```console
./configure \
--enable-embed \
--enable-zts \
--disable-zend-signals \
--with-iconv=/opt/homebrew/opt/libiconv/
```
#### Compile PHP
Finally, compile and install PHP:
```console
make -j"$(getconf _NPROCESSORS_ONLN)"
sudo make install
```
## Install Optional Dependencies
Some FrankenPHP features depend on optional system dependencies that must be installed.
Alternatively, these features can be disabled by passing build tags to the Go compiler.
| Feature | Dependency | Build tag to disable it |
|--------------------------------|-----------------------------------------------------------------------|-------------------------|
| Brotli compression | [Brotli](https://github.com/google/brotli) | nobrotli |
| Restart workers on file change | [Watcher C](https://github.com/e-dant/watcher/tree/release/watcher-c) | nowatcher |
## Compile the Go App
You can now build the final binary.
### Using xcaddy
The recommended way is to use [xcaddy](https://github.com/caddyserver/xcaddy) to compile FrankenPHP.
`xcaddy` also allows to easily add [custom Caddy modules](https://caddyserver.com/docs/modules/) and FrankenPHP extensions:
```console
CGO_ENABLED=1 \
XCADDY_GO_BUILD_FLAGS="-ldflags='-w -s' -tags=nobadger,nomysql,nopgx" \
CGO_CFLAGS=$(php-config --includes) \
CGO_LDFLAGS="$(php-config --ldflags) $(php-config --libs)" \
xcaddy build \
--output frankenphp \
--with github.com/dunglas/frankenphp/caddy \
--with github.com/dunglas/mercure/caddy \
--with github.com/dunglas/vulcain/caddy
# Add extra Caddy modules and FrankenPHP extensions here
```
> [!TIP]
>
> If you're using musl libc (the default on Alpine Linux) and Symfony,
> you may need to increase the default stack size.
> Otherwise, you may get errors like `PHP Fatal error: Maximum call stack size of 83360 bytes reached during compilation. Try splitting expression`
>
> To do so, change the `XCADDY_GO_BUILD_FLAGS` environment variable to something like
> `XCADDY_GO_BUILD_FLAGS=$'-ldflags "-w -s -extldflags \'-Wl,-z,stack-size=0x80000\'"'`
> (change the stack size value according to your app needs).
### Without xcaddy
Alternatively, it's possible to compile FrankenPHP without `xcaddy` by using the `go` command directly:
```console
curl -L https://github.com/php/frankenphp/archive/refs/heads/main.tar.gz | tar xz
cd frankenphp-main/caddy/frankenphp
CGO_CFLAGS=$(php-config --includes) CGO_LDFLAGS="$(php-config --ldflags) $(php-config --libs)" go build -tags=nobadger,nomysql,nopgx
```