Add meson build system by moi15moi · Pull Request #471 · FFMS/ffms2

moi15moi · 2026-01-29T02:55:11Z

This is a second attempt to add meson build system support (#338) since I believe meson is now a bit more mature. It is still pretty new compare to autotools, but as some benefits (ex: easy cross-compilation, IDE support, support MSVC out of the box).

I did it just for fun, but since it allow to build the unit tests with MSVC, I thought it might be a good idea to share it.

I also tested all the possibilities (ffmpeg->shared + ffms2->shared build, ffmpeg->static+ ffms2->shared build, etc...) in this PR to be sure to cover as many use case as possible.

The second commit is a "bonus", but can be useful since, in the last release, I believe you forgot to include the x86 build (see issue #470). If you want, I can add a arm64 build since windows arm is slowly getting a bit more common.

Also, if you want me to add renovate to automatically update subprojects/AviSynth+.wrap version, tell me.

dwbuiten · 2026-04-05T15:08:31Z

If this covers 100% of the functionality of configure, I would love to just nuke autoconf and use only meson.

moi15moi · 2026-04-06T20:34:07Z

If this covers 100% of the functionality of configure, I would love to just nuke autoconf and use only meson.

Yes, it does.
I removed autotools and msbuild support.

I also decided to add a small test on top of introducing meson.
The test assure that our header are always compatible with c99 (to avoid issue like this one: #472 (comment))

PS: Note that you can also use muon to build the project, but you need at least to use a version that include this commit due to a bug (so, muon 0.6.0 and over work fine). muon is usefull for distro that doesn't ship meson 1.3.0 or newer. It allow to build on any distro where gcc support c++11 (because muon simply require gcc 4.5 and c++11 was added in gcc 4.8.1). It is fairly simple to build muon from scratch. See the bootstraping instruction here.

moi15moi · 2026-04-09T14:07:02Z

I just fixed the conflict due to 0fa01d0

myrsloik · 2026-04-25T15:16:57Z

Don't remove the the msvc build. It's very useful for testing and debugging and people who want to contribute easily.

Ichunjo · 2026-04-25T15:38:12Z

Maybe I'm missing something but what's the point of adding cygwin?
Also, on Windows, why not also using clang and clang++?

moi15moi · 2026-04-25T18:27:25Z

Don't remove the the msvc build. It's very useful for testing and debugging and people who want to contribute easily.

I don't use visual studio, but the option --backend vs doesn't work well for you?

moi15moi · 2026-04-25T18:29:01Z

Maybe I'm missing something but what's the point of adding cygwin?

Simply, to be sure we still support this platform.

Also, on Windows, why not also using clang and clang++?

Because we don't use it in the master branch.

Ichunjo · 2026-04-25T18:57:01Z

Maybe I'm missing something but what's the point of adding cygwin?

Simply, to be sure we still support this platform.

What I was implying is: does it still make sense to support this platform?

Also, on Windows, why not also using clang and clang++?

Because we don't use it in the master branch.

Well, maybe it's time to change!

moi15moi · 2026-05-21T15:43:41Z

@dwbuiten Do you have any interest in this PR?

seiya-git · 2026-07-30T12:48:27Z

Why still need Cygwin and MSYS if everything can be installed/builded without it?

…lease The workflow "Release Windows artifacts" will be runned when we create a new github release. It will automatically create the .7z file containing the x86 + x64 build and add it to the release.

We cannot use ffmpeg oackage available on cygwin repo because the build doesn't contain a HEVC decoder. See: https://cygwin.com/pipermail/cygwin/2026-March/259560.html

…vailable to build the project This allow to fix these errors when compiling on cygwin: ``` ../src/vapoursynth/VSHelper4.h:76:9: error: there are no arguments to 'posix_memalign' that depend on a template parameter, so a declaration of 'posix_memalign' must be available [-fpermissive] 76 | if (posix_memalign(&tmp, alignment, size)) | ^~~~~~~~~~~~~~ ../src/index/ffmsindex.cpp:122:20: error: 'strdup' was not declared in this scope; did you mean 'strcmp'? 122 | pair.Key = strdup(en->key); | ^~~~~~ | strcmp ```

The goal is to catch issue like this one: FFMS#472 (comment)

Fix these errors reported by clang: ``` FAILED: [code=1] test/c99_header.p/test.c.o clang -Itest/c99_header.p -Itest -I../test -I../include -fdiagnostics-color=always -DNDEBUG -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -Wextra -Wpedantic -Werror -std=c99 -O3 -pedantic -MD -MQ test/c99_header.p/test.c.o -MF test/c99_header.p/test.c.o.d -o test/c99_header.p/test.c.o -c ../test/test.c In file included from ../test/test.c:2: ../include/ffms.h:436:30: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes] 436 | FFMS_API(int) FFMS_GetVersion(); | ^ | void ../include/ffms.h:437:31: error: a function declaration without a prototype is deprecated in all versions of C [-Werror,-Wstrict-prototypes] 437 | FFMS_API(int) FFMS_GetLogLevel(); | ^ | void ```

Since 2026-03-15, MINGW64 is deprecated: https://www.msys2.org/news/#2026-03-15-deprecating-the-mingw64-environment

moi15moi · 2026-07-30T13:59:48Z

Why still need Cygwin and MSYS if everything can be installed/builded without it?

MSYS2 is still needed because it provides gcc and clang. GCC and Clang often produce faster and more optimized binaries than MSVC.
For cygwin, I just added it to be sure we still support this platform. Since ffmpeg support it, I believe we should also try our best to support it.

myrsloik · 2026-07-30T15:07:43Z

Just out of curiosity, why don't you simply model this after the bestsource build system/CI? After my latest changes it builds everything with clang and on windows msvc as well. In addition to that it attaches both clang and msvc binaries for windows on release automatically.

This has clogged my github notifications for long enough.

moi15moi · 2026-07-30T15:58:19Z

why don't you simply model this after the bestsource build system/CI?

What do you my by "bestsource build system"?
bestsource also use meson, so I'm not sure what you mean.

For the CI, from what I can see, bestsource has

build-non-windows-wheel (linux_aarch64, ubuntu-24.04-arm)
build-non-windows-wheel (linux_x86_64, ubuntu-latest)
build-non-windows-wheel (macosx_arm64, macos-15)
build-non-windows-wheel (macosx_x86_64, macos-15-intel)
build-windows-wheel
build-windows-msvc

ffms2 still doesn't support wheels, so except build-windows-msvc, all of the jobs doesn't really make sense for ffms2.
build-windows-msvc is pretty much the same as my Build on Windows / Test Windows MSVC except that it cache ffmpeg.

I believe it is a good practice to compile code on many platform as possible.
The only differences with the master branch CI is that now, I build the project with clang in msys2, I added cygwin and that I also build the project with muon.

PS: Note that I will add python wheels support to ffms2 in another PR. I am trying first to simply replace autotools with meson first.

moi15moi force-pushed the Add-meson branch 2 times, most recently from 100349f to 8dcda06 Compare February 2, 2026 01:56

arch1t3cht reviewed Apr 5, 2026

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moi15moi commented Apr 10, 2026

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Ichunjo mentioned this pull request May 5, 2026

Add support for VapourSynth plugins through extras Jaded-Encoding-Thaumaturgy/vs-jetpack#288

Merged

moi15moi added 7 commits July 30, 2026 09:40

Add meson support

038de6f

When publishing a new release, build the project and add it to the re…

a51a96d

…lease The workflow "Release Windows artifacts" will be runned when we create a new github release. It will automatically create the .7z file containing the x86 + x64 build and add it to the release.

[ci-meson] Add Cygwin

dd70b2f

We cannot use ffmpeg oackage available on cygwin repo because the build doesn't contain a HEVC decoder. See: https://cygwin.com/pipermail/cygwin/2026-March/259560.html

[AviSynth+.wrap] Add small meson.build to replace cmake

7be67fc

Remove autotools and MSBuild support

826a70e

Add a test to verify that the header are indeed c99

fd8b641

The goal is to catch issue like this one: FFMS#472 (comment)

moi15moi added 5 commits July 30, 2026 09:40

[CI] Use UCRT64 instead of MINGW64

ae236fd

Since 2026-03-15, MINGW64 is deprecated: https://www.msys2.org/news/#2026-03-15-deprecating-the-mingw64-environment

[ci-meson] Add msys2 CLANG64

7aa5fa8

[CI] Add muon CI

8f58950

Install pkgconf with Winget

a4dc4c1

moi15moi force-pushed the Add-meson branch from 60ea50f to a4dc4c1 Compare July 30, 2026 13:40

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