jade
0d37b99a15
Benchmarks say that it does not regress performance by more than 1%
(which is where it gets really hard to measure accurately anyhow).
Meson appears to be planning to do this for us without asking us in a
release we will get in the future, and it seems good enough to ship
today:
https://mesonbuild.com/Release-notes-for-1-4-0.html#ndebug-setting-now-controls-c-stdlib-assertions
Benchmarks:
| Command | Mean [ms] | Min [ms] | Max [ms] | Relative |
|:---|---:|---:|---:|---:|
| `result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 418.4 ± 25.0 | 396.9 | 451.2 | 1.01 ± 0.08 |
| `result/bin/nix --extra-experimental-features 'nix-command flakes' eval -f ../nixpkgs/pkgs/development/haskell-modules/hackage-packages.nix` | 416.1 ± 23.9 | 397.1 | 445.4 | 1.00 |
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `GC_INITIAL_HEAP_SIZE=10g result-asserts/bin/nix eval --extra-experimental-features 'nix-command flakes' --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.147 ± 0.021 | 4.123 | 4.195 | 1.00 |
| `GC_INITIAL_HEAP_SIZE=10g result/bin/nix eval --extra-experimental-features 'nix-command flakes' --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 4.149 ± 0.027 | 4.126 | 4.215 | 1.00 ± 0.01 |
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 5.838 ± 0.023 | 5.799 | 5.867 | 1.01 ± 0.01 |
| `result/bin/nix --extra-experimental-features 'nix-command flakes' eval --raw --impure --expr 'with import <nixpkgs/nixos> {}; system'` | 5.788 ± 0.044 | 5.715 | 5.876 | 1.00 |
| Command | Mean [s] | Min [s] | Max [s] | Relative |
|:---|---:|---:|---:|---:|
| `result-asserts/bin/nix --extra-experimental-features 'nix-command flakes' search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 15.993 ± 0.081 | 15.829 | 16.096 | 1.01 ± 0.01 |
| `result/bin/nix --extra-experimental-features 'nix-command flakes' search --no-eval-cache github:nixos/nixpkgs/e1fa12d4f6c6fe19ccb59cac54b5b3f25e160870 hello` | 15.897 ± 0.075 | 15.807 | 16.047 | 1.00 |
Fixes: #4
Change-Id: Id3a6f38274ba94d5d10b09edd19dfd96bc3e7d5f
397 lines
13 KiB
Meson
397 lines
13 KiB
Meson
#
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# OUTLINE:
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#
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# The top-level meson.build file (this file) handles general logic for build options,
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# generation of config.h (which is put in the build directory, not the source root
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# like the previous, autoconf-based build system did), the mechanism for header
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# generation, and the few global C++ compiler arguments that are added to all targets in Lix.
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#
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# src/meson.build coordinates each of Lix's subcomponents (the lib dirs in ./src),
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# which each have their own meson.build. Lix's components depend on each other,
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# so each of `src/lib{util,store,fetchers,expr,main,cmd}/meson.build` rely on variables
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# set in earlier `meson.build` files. Each of these also defines the install targets for
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# their headers.
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#
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# src/meson.build also collects the miscellaneous source files that are in further subdirectories
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# that become part of the final Nix command (things like `src/nix-build/*.cc`).
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#
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# Finally, src/nix/meson.build defines the Nix command itself, relying on all prior meson files.
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#
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# Unit tests are setup in tests/unit/meson.build, under the test suite "check".
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#
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# Functional tests are a bit more complicated. Generally they're defined in
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# tests/functional/meson.build, and rely on helper scripts meson/setup-functional-tests.py
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# and meson/run-test.py. Scattered around also are configure_file() invocations, which must
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# be placed in specific directories' meson.build files to create the right directory tree
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# in the build directory.
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project('lix', 'cpp',
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version : run_command('bash', '-c', 'echo -n $(cat ./.version)$VERSION_SUFFIX', check : true).stdout().strip(),
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default_options : [
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'cpp_std=c++2a',
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# TODO(Qyriad): increase the warning level
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'warning_level=1',
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'debug=true',
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'optimization=2',
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'errorlogs=true', # Please print logs for tests that fail
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],
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)
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fs = import('fs')
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prefix = get_option('prefix')
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# For each of these paths, assume that it is relative to the prefix unless
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# it is already an absolute path (which is the default for store-dir, state-dir, and log-dir).
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path_opts = [
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# Meson built-ins.
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'datadir',
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'sysconfdir',
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'bindir',
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'mandir',
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'libdir',
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'includedir',
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'libexecdir',
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# Homecooked Lix directories.
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'store-dir',
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'state-dir',
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'log-dir',
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]
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# For your grepping pleasure, this loop sets the following variables that aren't mentioned
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# literally above:
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# store_dir
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# state_dir
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# log_dir
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foreach optname : path_opts
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varname = optname.replace('-', '_')
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path = get_option(optname)
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if fs.is_absolute(path)
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set_variable(varname, path)
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else
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set_variable(varname, prefix / path)
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endif
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endforeach
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enable_docs = get_option('enable-docs')
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enable_tests = get_option('enable-tests')
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tests_args = []
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if get_option('tests-color')
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tests_args += '--gtest_color=yes'
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endif
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if get_option('tests-brief')
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tests_args += '--gtest_brief=1'
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endif
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cxx = meson.get_compiler('cpp')
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host_system = host_machine.cpu_family() + '-' + host_machine.system()
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message('canonical Nix system name:', host_system)
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is_linux = host_machine.system() == 'linux'
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is_darwin = host_machine.system() == 'darwin'
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is_x64 = host_machine.cpu_family() == 'x86_64'
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# Per-platform arguments that you should probably pass to shared_module() invocations.
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# Something like add_project_arguments() can't be scoped on only shared modules, so this
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# variable is here instead.
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# This corresponds to the $(1)_ALLOW_UNDEFINED option from the Make buildsystem.
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# Mostly this is load-bearing on the plugin tests defined in tests/functional/plugins/meson.build.
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shared_module_link_args = []
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if is_darwin
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shared_module_link_args += ['-undefined', 'suppress', '-flat_namespace']
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elif is_linux
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# -Wl,-z,defs is the equivalent, but a comment in the Make buildsystem says that breaks
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# Clang sanitizers on Linux.
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# FIXME(Qyriad): is that true?
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endif
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deps = [ ]
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configdata = { }
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#
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# Dependencies
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#
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boehm = dependency('bdw-gc', required : get_option('gc'))
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if boehm.found()
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deps += boehm
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endif
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configdata += {
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'HAVE_BOEHMGC': boehm.found().to_int(),
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}
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boost = dependency('boost', required : true, modules : ['context', 'coroutine', 'container'])
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deps += boost
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# cpuid only makes sense on x86_64
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cpuid_required = is_x64 ? get_option('cpuid') : false
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cpuid = dependency('libcpuid', 'cpuid', required : cpuid_required)
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configdata += {
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'HAVE_LIBCPUID': cpuid.found().to_int(),
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}
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deps += cpuid
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# seccomp only makes sense on Linux
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seccomp_required = is_linux ? get_option('seccomp-sandboxing') : false
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seccomp = dependency('libseccomp', 'seccomp', required : seccomp_required)
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configdata += {
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'HAVE_SECCOMP': seccomp.found().to_int(),
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}
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libarchive = dependency('libarchive', required : true)
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deps += libarchive
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brotli = [
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dependency('libbrotlicommon', required : true),
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dependency('libbrotlidec', required : true),
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dependency('libbrotlienc', required : true),
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]
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deps += brotli
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openssl = dependency('libcrypto', 'openssl', required : true)
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deps += openssl
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aws_sdk = dependency('aws-cpp-sdk-core', required : false)
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if aws_sdk.found()
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# The AWS pkg-config adds -std=c++11.
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# https://github.com/aws/aws-sdk-cpp/issues/2673
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aws_sdk = aws_sdk.partial_dependency(
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compile_args : false,
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includes : true,
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link_args : true,
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links : true,
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sources : true,
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)
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deps += aws_sdk
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s = aws_sdk.version().split('.')
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configdata += {
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'AWS_VERSION_MAJOR': s[0].to_int(),
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'AWS_VERSION_MINOR': s[1].to_int(),
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'AWS_VERSION_PATCH': s[2].to_int(),
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}
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aws_sdk_transfer = dependency('aws-cpp-sdk-transfer', required : true).partial_dependency(
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compile_args : false,
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includes : true,
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link_args : true,
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links : true,
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sources : true,
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)
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endif
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aws_s3 = dependency('aws-cpp-sdk-s3', required : false)
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if aws_s3.found()
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# The AWS pkg-config adds -std=c++11.
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# https://github.com/aws/aws-sdk-cpp/issues/2673
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aws_s3 = aws_s3.partial_dependency(
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compile_args : false,
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includes : true,
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link_args : true,
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links : true,
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sources : true,
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)
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deps += aws_s3
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endif
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configdata += {
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'ENABLE_S3': aws_s3.found().to_int(),
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}
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sqlite = dependency('sqlite3', 'sqlite', version : '>=3.6.19', required : true)
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deps += sqlite
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sodium = dependency('libsodium', 'sodium', required : true)
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deps += sodium
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curl = dependency('libcurl', 'curl', required : true)
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deps += curl
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editline = dependency('libeditline', 'editline', version : '>=1.14', required : true)
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deps += editline
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lowdown = dependency('lowdown', version : '>=0.9.0', required : true)
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deps += lowdown
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# HACK(Qyriad): rapidcheck's pkg-config doesn't include the libs lol
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rapidcheck_meson = dependency('rapidcheck', required : enable_tests)
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rapidcheck = declare_dependency(dependencies : rapidcheck_meson, link_args : ['-lrapidcheck'])
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deps += rapidcheck
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gtest = [
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dependency('gtest', required : enable_tests),
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dependency('gtest_main', required : enable_tests),
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dependency('gmock', required : enable_tests),
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dependency('gmock_main', required : enable_tests),
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]
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deps += gtest
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toml11 = dependency('toml11', version : '>=3.7.0', required : true)
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deps += toml11
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nlohmann_json = dependency('nlohmann_json', required : true)
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deps += nlohmann_json
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# lix-doc is a Rust project provided via buildInputs and unfortunately doesn't have any way to be detected.
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# Just declare it manually to resolve this.
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#
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# FIXME: build this with meson in the future after we drop Make (with which we
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# *absolutely* are not going to make it work)
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lix_doc = declare_dependency(link_args : [ '-llix_doc' ])
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deps += lix_doc
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#
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# Build-time tools
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#
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bash = find_program('bash')
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coreutils = find_program('coreutils')
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dot = find_program('dot', required : false)
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pymod = import('python')
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python = pymod.find_installation('python3')
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# Used to workaround https://github.com/mesonbuild/meson/issues/2320 in src/nix/meson.build.
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installcmd = find_program('install')
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sandbox_shell = get_option('sandbox-shell')
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# Consider it required if we're on Linux and the user explicitly specified a non-default value.
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sandbox_shell_required = sandbox_shell != 'busybox' and host_machine.system() == 'linux'
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# NOTE(Qyriad): package.nix puts busybox in buildInputs for Linux.
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# Most builds should not require setting this.
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busybox = find_program(sandbox_shell, required : sandbox_shell_required, native : false)
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if not busybox.found() and host_machine.system() == 'linux' and sandbox_shell_required
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warning('busybox not found and other sandbox shell was specified')
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warning('a sandbox shell is recommended on Linux -- configure with -Dsandbox-shell=/path/to/shell to set')
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endif
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# FIXME(Qyriad): the autoconf system checks that busybox has the "standalone" feature, indicating
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# that busybox sh won't run busybox applets as builtins (which would break our sandbox).
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lsof = find_program('lsof')
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bison = find_program('bison')
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flex = find_program('flex')
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# This is how Nix does generated headers...
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# other instances of header generation use a very similar command.
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# FIXME(Qyriad): do we really need to use the shell for this?
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gen_header_sh = 'echo \'R"__NIX_STR(\' | cat - @INPUT@ && echo \')__NIX_STR"\''
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gen_header = generator(
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bash,
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arguments : [ '-c', gen_header_sh ],
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capture : true,
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output : '@PLAINNAME@.gen.hh',
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)
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#
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# Configuration
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#
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run_command('ln', '-s',
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meson.project_build_root() / '__nothing_link_target',
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meson.project_build_root() / '__nothing_symlink',
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check : true,
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)
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can_link_symlink = run_command('ln',
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meson.project_build_root() / '__nothing_symlink',
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meson.project_build_root() / '__nothing_hardlink',
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check : false,
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).returncode() == 0
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run_command('rm', '-f',
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meson.project_build_root() / '__nothing_symlink',
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meson.project_build_root() / '__nothing_hardlink',
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check : true,
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)
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summary('can hardlink to symlink', can_link_symlink, bool_yn : true)
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configdata += { 'CAN_LINK_SYMLINK': can_link_symlink.to_int() }
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# Check for each of these functions, and create a define like `#define HAVE_LCHOWN 1`.
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check_funcs = [
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'lchown',
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'lutimes',
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'pipe2',
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'posix_fallocate',
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'statvfs',
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'strsignal',
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'sysconf',
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]
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foreach funcspec : check_funcs
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define_name = 'HAVE_' + funcspec.underscorify().to_upper()
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define_value = cxx.has_function(funcspec).to_int()
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configdata += {
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define_name: define_value,
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}
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endforeach
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config_h = configure_file(
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configuration : {
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'PACKAGE_NAME': '"' + meson.project_name() + '"',
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'PACKAGE_VERSION': '"' + meson.project_version() + '"',
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'PACKAGE_TARNAME': '"' + meson.project_name() + '"',
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'PACKAGE_STRING': '"' + meson.project_name() + ' ' + meson.project_version() + '"',
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'HAVE_STRUCT_DIRENT_D_TYPE': 1, # FIXME: actually check this for solaris
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'SYSTEM': '"' + host_system + '"',
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} + configdata,
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output : 'config.h',
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)
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install_headers(config_h, subdir : 'nix')
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add_project_arguments(
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# TODO(Qyriad): Yes this is how the autoconf+Make system did it.
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# It would be nice for our headers to be idempotent instead.
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'-include', 'config.h',
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'-Wno-deprecated-declarations',
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'-Wimplicit-fallthrough',
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'-Werror=switch',
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'-Werror=switch-enum',
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# Enable assertions in libstdc++ by default. Harmless on libc++. Benchmarked
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# at ~1% overhead in `nix search`.
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#
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# FIXME: remove when we get meson 1.4.0 which will default this to on for us:
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# https://mesonbuild.com/Release-notes-for-1-4-0.html#ndebug-setting-now-controls-c-stdlib-assertions
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'-D_GLIBCXX_ASSERTIONS=1',
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language : 'cpp',
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)
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if cxx.get_id() in ['gcc', 'clang']
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# 2024-03-24: jade benchmarked the default sanitize reporting in clang and got
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# a regression of about 10% on hackage-packages.nix with clang. So we are trapping instead.
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#
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# This has an unmeasurably low overhead in Nix evaluation benchmarks.
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#
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# N.B. Meson generates a completely nonsense warning here:
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# https://github.com/mesonbuild/meson/issues/9822
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# Both of these args cannot be written in the default meson configuration.
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# b_sanitize=signed-integer-overflow is ignored, and
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# -fsanitize-undefined-trap-on-error is not representable.
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sanitize_args = ['-fsanitize=signed-integer-overflow', '-fsanitize-undefined-trap-on-error']
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add_project_arguments(sanitize_args, language: 'cpp')
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add_project_link_arguments(sanitize_args, language: 'cpp')
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endif
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add_project_link_arguments('-pthread', language : 'cpp')
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if cxx.get_linker_id() in ['ld.bfd', 'ld.gold']
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add_project_link_arguments('-Wl,--no-copy-dt-needed-entries', language : 'cpp')
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endif
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# Generate Chromium tracing files for each compiled file, which enables
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# maintainers/buildtime_report.sh BUILD-DIR to simply work in clang builds.
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#
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# They can also be manually viewed at https://ui.perfetto.dev
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if get_option('profile-build').require(meson.get_compiler('cpp').get_id() == 'clang').enabled()
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add_project_arguments('-ftime-trace', language: 'cpp')
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endif
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subdir('src')
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subdir('scripts')
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subdir('misc')
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if enable_docs
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subdir('doc/manual')
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endif
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if enable_tests
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subdir('tests/unit')
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subdir('tests/functional')
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endif
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