`prepare_offline_dependencies.sh` will generate a tarball containing:
* Files required for PIP to install Conan
* Conan download cache
The resulting tarball content depends on CMake flags passed down
to the script.
`build_package.sh` demonstrates how to use the offline dependecies
to build Audacity. The script requires the exact CMake options that were
provided to `prepare_offline_dependencies.sh`
`build_packages.sh` allows validating the build process for different
Linux distros. It uses Docker to:
* Generate the dependencies tarball.
* Execute an offline build using `build_package.sh`.
* Generate distro specific packages, offline as well.
Break the workflow into smaller stages (Configure, Build, Install,
Package, etc.) so that you can see exactly which stage failed in the
GitHub Actions run log.
Create a separate Bash CI script for each job stage (configure.sh,
build.sh, install.sh, package.sh, etc.) to reduce the size of the main
YAML workflow file and enable Bash syntax highlighting.
Close#917
add_conan_lib cmake function is defined, that allows to add a dependency using Conan with two possible system fallbacks:
1. pkg_check_modules is invoked, if `PGK_CONFIG ...` is present
2. find_package is invoked if `FIND_PACKAGE_OPTIONS` is present and `pkg_check_modules` has failed
If `ALWAYS_ALLOW_CONAN_FALLBACK` is present - `obey_system_dependencies` will be ignored for the package
Currently, the following dependencies are retrieved using Conan:
* zlib
* expat
* wxwidgets
* libmp3lame
* libid3tag
* libmad
The last three libraries are included in this commit, as they depend on zlib.
Properly pass **arch** and **os.version** to Conan
Since XCode 10, Apple does not recommend building for macOS <10.9
Reason - 10.7 and 10.8 require libstdc++
We enforce libc++
```# Shouldn't cmake do this???
string( APPEND CMAKE_CXX_FLAGS " -stdlib=libc++" )```
While this generally works, it makes the proper dependency management tricky.
Compiler message for the library support:
```
clang: warning: libstdc++ is deprecated; move to libc++ with a minimum deployment target of OS X 10.9 [-Wdeprecated]
ld: library not found for -lstdc++
```
A special mode `audacity_obey_system_dependencies` is added, so the build will fail if we could not build against a system package for some reason.
The following packages are marked for the local build now:
* **wxWidgets**: Ubuntu lacks support for 3.1.3. We can't build against 3.0 branch.
* **portaudio**: there are issues, that prevent using a system version of portaudio.
* **sqlite3**: Ubuntu package is very dated; we care about the performance and stability.
* **nyquist**: Ubuntu has no package available.
* **vamp**: Ubuntu has no development package available.
* **portmixer**: Ubuntu has no package available.
* **sbsms**: Ubuntu package is very dated; we care about the performance and stability.
We use docker to create a clean build environment. Currently, `pkg-config` is used to locate the system libraries. There are few issues with `pkg-config` on Ubuntu:
* It does not work with `lame` and `portmidi`.
* The packaged files for `id3tag` and `mad` have wrong version.
We fix such cases by copying the
into `/usr/local/lib`.
