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revise meson notes again

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John Cupitt 2022-02-09 08:57:58 +00:00
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@ -63,41 +63,47 @@ install notes](https://libvips.github.io/libvips/install.html).
# Building from source
libvips uses the [Meson build system](https://mesonbuild.com), version 0.56 or
later, with [ninja](https://ninja-build.org).
libvips uses the [Meson build system](https://mesonbuild.com), version 0.56
or later. We suggest installing [`ninja`](https://ninja-build.org) for fast
compiles, but meson will use whatever make-like tool you have available.
To compile, libvips must have `build-essential`, `pkg-config`,
`libglib2.0-dev`, `libexpat1-dev`. See the **Dependencies** section below
for a full list of the libvips optional dependencies.
libvips must have `build-essential`, `pkg-config`, `libglib2.0-dev`,
`libexpat1-dev`. See the **Dependencies** section below for a full list
of the libvips optional dependencies.
## Cheatsheet
```
cd libvips-x.y.x
meson setup build --prefix=/aaa/bbb/ccc
cd build
ninja
ninja install
meson setup build-dir --prefix=/aaa/bbb/ccc
cd build-dir
meson build
meson test
meson install
```
Notes:
Check the output of `meson setup` carefully and make sure it found everything
you wanted it to find. Add arguments to `meson setup` to change the build
configuration.
- Check the output of `meson setup` carefully and make sure it found
everything you wanted it to find.
- Add flags like `-Dnsgif=false` to turn options on and off, see
`meson_options.txt` for a list of all the build options libvips supports.
- Add `--buildtype=release` for a release (optimised) build.
- You might need to add `--libdir=lib` on Debian if you don't want the arch
name in the library path.
- Use `--default-library=static` for a static build.
- Use `ninja test` to run the tests.
- There's a more comprehensive test suite you can run with `pytest`.
- Add `--default-library=static` for a static build.
- Use eg. `CC=clang CXX=clang++ meson setup ...` to change compiler.
- You can have many `build-dir`, pick whatever names you like, for example
one for release and one for debug.
There's a more comprehensive test suite you can run once libvips has been
installed. Use `pytest` in the libvips base directory.
## Optional dependencies
If suitable versions are found, libvips will add support for the following
libraries automatically. Packages are generally found with `pkg-config`,
so make sure that is working.
so make sure that is working.
### libjpeg