Build nix-store with Meson

Special thanks to everyone that has worked on a Meson port so far,
@p01arst0rm and @Qyriad in particular.

Co-Authored-By: p01arst0rm <polar@ever3st.com>
Co-Authored-By: Artemis Tosini <lix@artem.ist>
Co-Authored-By: Artemis Tosini <me@artem.ist>
Co-Authored-By: Felix Uhl <felix.uhl@outlook.com>
Co-Authored-By: Jade Lovelace <lix@jade.fyi>
Co-Authored-By: Lunaphied <lunaphied@lunaphied.me>
Co-Authored-By: Maximilian Bosch <maximilian@mbosch.me>
Co-Authored-By: Pierre Bourdon <delroth@gmail.com>
Co-Authored-By: Qyriad <qyriad@qyriad.me>
Co-Authored-By: Rebecca Turner <rbt@sent.as>
Co-Authored-By: Winter <winter@winter.cafe>
Co-Authored-By: eldritch horrors <pennae@lix.systems>
Co-Authored-By: jade <lix@jade.fyi>
Co-Authored-By: julia <midnight@trainwit.ch>
Co-Authored-By: rebecca “wiggles” turner <rbt@sent.as>
Co-Authored-By: wiggles dog <rbt@sent.as>
Co-Authored-By: fricklerhandwerk <valentin@fricklerhandwerk.de>
Co-authored-by: Eli Schwartz <eschwartz93@gmail.com>

flake.nix

@@ -169,6 +169,17 @@
               ;
           };
 
+          nix-store = final.callPackage ./src/libstore/package.nix {
+            inherit
+              fileset
+              stdenv
+              officialRelease
+              versionSuffix
+              ;
+            libseccomp = final.libseccomp-nix;
+            busybox-sandbox-shell = final.busybox-sandbox-shell or final.default-busybox-sandbox-shell;
+          };
+
           nix =
             final.callPackage ./package.nix {
               inherit
@@ -260,6 +271,7 @@
         {
           "nix" = { };
           "nix-util" = { };
+          "nix-store" = { };
         }
         // lib.optionalAttrs (builtins.elem system linux64BitSystems) {
         dockerImage =
@@ -312,10 +324,11 @@
               "${(pkgs.formats.yaml { }).generate "pre-commit-config.yaml" modular.pre-commit.settings.rawConfig}";
           };
 
-          inherit (pkgs.nix-util) mesonFlags;
+          mesonFlags = pkgs.nix-util.mesonFlags ++ pkgs.nix-store.mesonFlags;
 
           nativeBuildInputs = attrs.nativeBuildInputs or []
             ++ pkgs.nix-util.nativeBuildInputs
+            ++ pkgs.nix-store.nativeBuildInputs
             ++ [
               modular.pre-commit.settings.package
               (pkgs.writeScriptBin "pre-commit-hooks-install"

maintainers/hydra.nix

@@ -33,7 +33,11 @@ let
       doBuild = false;
     };
 
-  forAllPackages = lib.genAttrs [ "nix" "nix-util" ];
+  forAllPackages = lib.genAttrs [
+    "nix"
+    "nix-util"
+    "nix-store"
+  ];
 in
 {
   # Binary package for various platforms.

meson.build

@@ -7,3 +7,4 @@ project('nix-dev-shell', 'cpp',
 )
 
 subproject('libutil')
+subproject('libstore')

src/libstore/.version

@@ -0,0 +1 @@
+../../.version

src/libstore/build/derivation-goal.cc

@@ -26,7 +26,7 @@
 #include <unistd.h>
 
 #ifndef _WIN32 // TODO abstract over proc exit status
-# include <sys/wait.h>
+#  include <sys/wait.h>
 #endif
 
 #include <nlohmann/json.hpp>

src/libstore/linux/meson.build

@@ -0,0 +1,10 @@
+sources += files(
+  'personality.cc',
+)
+
+include_dirs += include_directories('.')
+
+headers += files(
+  'fchmodat2-compat.hh',
+  'personality.hh',
+)

src/libstore/meson.build

@@ -0,0 +1,452 @@
+project('nix-store', 'cpp',
+  version : files('.version'),
+  default_options : [
+    'cpp_std=c++2a',
+    # TODO(Qyriad): increase the warning level
+    'warning_level=1',
+    'debug=true',
+    'optimization=2',
+    'errorlogs=true', # Please print logs for tests that fail
+  ],
+  meson_version : '>= 1.1',
+  license : 'LGPL-2.1-or-later',
+)
+
+cxx = meson.get_compiler('cpp')
+
+# See note in ../nix-util/meson.build
+deps_private = [ ]
+
+# See note in ../nix-util/meson.build
+deps_public = [ ]
+
+# See note in ../nix-util/meson.build
+deps_other = [ ]
+
+configdata = configuration_data()
+
+# TODO rename, because it will conflict with downstream projects
+configdata.set_quoted('PACKAGE_VERSION', meson.project_version())
+
+configdata.set_quoted('SYSTEM', host_machine.system())
+
+nix_util = dependency('nix-util')
+if nix_util.type_name() == 'internal'
+  # subproject sadly no good for pkg-config module
+  deps_other += nix_util
+else
+  deps_public += nix_util
+endif
+
+run_command('ln', '-s',
+  meson.project_build_root() / '__nothing_link_target',
+  meson.project_build_root() / '__nothing_symlink',
+  check : true,
+)
+can_link_symlink = run_command('ln',
+  meson.project_build_root() / '__nothing_symlink',
+  meson.project_build_root() / '__nothing_hardlink',
+  check : false,
+).returncode() == 0
+run_command('rm', '-f',
+  meson.project_build_root() / '__nothing_symlink',
+  meson.project_build_root() / '__nothing_hardlink',
+  check : true,
+)
+summary('can hardlink to symlink', can_link_symlink, bool_yn : true)
+configdata.set('CAN_LINK_SYMLINK', can_link_symlink.to_int())
+
+# Check for each of these functions, and create a define like `#define HAVE_LCHOWN 1`.
+#
+# Only need to do functions that deps (like `libnixutil`) didn't already
+# check for.
+check_funcs = [
+  # Optionally used for canonicalising files from the build
+  'lchown',
+]
+foreach funcspec : check_funcs
+  define_name = 'HAVE_' + funcspec.underscorify().to_upper()
+  define_value = cxx.has_function(funcspec).to_int()
+  configdata.set(define_name, define_value)
+endforeach
+
+has_acl_support = cxx.has_header('sys/xattr.h') \
+  and cxx.has_function('llistxattr') \
+  and cxx.has_function('lremovexattr')
+configdata.set('HAVE_ACL_SUPPORT', has_acl_support.to_int())
+
+# This is only conditional to work around
+# https://github.com/mesonbuild/meson/issues/13293. It should be
+# unconditional.
+if not (host_machine.system() == 'windows' and cxx.get_id() == 'gcc')
+  deps_private += dependency('threads')
+endif
+
+boost = dependency(
+  'boost',
+  modules : ['container'],
+)
+# boost is a public dependency, but not a pkg-config dependency unfortunately, so we
+# put in `deps_other`.
+deps_other += boost
+
+curl = dependency('libcurl', 'curl')
+deps_private += curl
+
+# seccomp only makes sense on Linux
+is_linux = host_machine.system() == 'linux'
+seccomp_required = get_option('seccomp-sandboxing')
+if not is_linux and seccomp_required.enabled()
+  warning('Force-enabling seccomp on non-Linux does not make sense')
+endif
+seccomp = dependency('libseccomp', 'seccomp', required : seccomp_required, version : '>=2.5.5')
+if is_linux and not seccomp.found()
+  warning('Sandbox security is reduced because libseccomp has not been found! Please provide libseccomp if it supports your CPU architecture.')
+endif
+configdata.set('HAVE_SECCOMP', seccomp.found().to_int())
+deps_private += seccomp
+
+nlohmann_json = dependency('nlohmann_json', version : '>= 3.9')
+deps_public += nlohmann_json
+
+sqlite = dependency('sqlite3', 'sqlite', version : '>=3.6.19')
+deps_private += sqlite
+
+
+enable_embedded_sandbox_shell = get_option('embedded-sandbox-shell')
+if enable_embedded_sandbox_shell
+  # This one goes in config.h
+  # The path to busybox is passed as a -D flag when compiling this_library.
+  # Idk why, ask the old buildsystem.
+  configdata.set('HAVE_EMBEDDED_SANDBOX_SHELL', 1)
+endif
+
+generated_headers = []
+foreach header : [ 'schema.sql', 'ca-specific-schema.sql' ]
+  generated_headers += custom_target(
+    command : [ 'bash', '-c', '{ echo \'R"__NIX_STR(\' && cat @INPUT@ && echo \')__NIX_STR"\'; } > "$1"', '_ignored_argv0', '@OUTPUT@' ],
+    input : header,
+    output : '@PLAINNAME@.gen.hh',
+    install : true,
+    install_dir : get_option('includedir') / 'nix'
+  )
+endforeach
+
+if enable_embedded_sandbox_shell
+  hexdump = find_program('hexdump', native : true)
+  embedded_sandbox_shell_gen = custom_target(
+    'embedded-sandbox-shell.gen.hh',
+    command : [
+      hexdump,
+      '-v',
+      '-e',
+      '1/1 "0x%x," "\n"'
+    ],
+    input : busybox.full_path(),
+    output : 'embedded-sandbox-shell.gen.hh',
+    capture : true,
+    feed : true,
+  )
+  generated_headers += embedded_sandbox_shell_gen
+endif
+
+config_h = configure_file(
+  configuration : configdata,
+  output : 'config-store.h',
+)
+
+add_project_arguments(
+  # TODO(Qyriad): Yes this is how the autoconf+Make system did it.
+  # It would be nice for our headers to be idempotent instead.
+  '-include', 'config-util.h',
+  '-include', 'config-store.h',
+  '-Wno-deprecated-declarations',
+  '-Wimplicit-fallthrough',
+  '-Werror=switch',
+  '-Werror=switch-enum',
+  '-Wdeprecated-copy',
+  '-Wignored-qualifiers',
+  # Enable assertions in libstdc++ by default. Harmless on libc++. Benchmarked
+  # at ~1% overhead in `nix search`.
+  #
+  # FIXME: remove when we get meson 1.4.0 which will default this to on for us:
+  # https://mesonbuild.com/Release-notes-for-1-4-0.html#ndebug-setting-now-controls-c-stdlib-assertions
+  '-D_GLIBCXX_ASSERTIONS=1',
+  language : 'cpp',
+)
+
+sources = files(
+  'binary-cache-store.cc',
+  'build-result.cc',
+  'build/derivation-goal.cc',
+  'build/drv-output-substitution-goal.cc',
+  'build/entry-points.cc',
+  'build/goal.cc',
+  'build/substitution-goal.cc',
+  'build/worker.cc',
+  'builtins/buildenv.cc',
+  'builtins/fetchurl.cc',
+  'builtins/unpack-channel.cc',
+  'common-protocol.cc',
+  'content-address.cc',
+  'daemon.cc',
+  'derivations.cc',
+  'derived-path-map.cc',
+  'derived-path.cc',
+  'downstream-placeholder.cc',
+  'dummy-store.cc',
+  'export-import.cc',
+  'filetransfer.cc',
+  'gc.cc',
+  'globals.cc',
+  'http-binary-cache-store.cc',
+  'indirect-root-store.cc',
+  'keys.cc',
+  'legacy-ssh-store.cc',
+  'local-binary-cache-store.cc',
+  'local-fs-store.cc',
+  'local-overlay-store.cc',
+  'local-store.cc',
+  'log-store.cc',
+  'machines.cc',
+  'make-content-addressed.cc',
+  'misc.cc',
+  'names.cc',
+  'nar-accessor.cc',
+  'nar-info-disk-cache.cc',
+  'nar-info.cc',
+  'optimise-store.cc',
+  'outputs-spec.cc',
+  'parsed-derivations.cc',
+  'path-info.cc',
+  'path-references.cc',
+  'path-with-outputs.cc',
+  'path.cc',
+  'pathlocks.cc',
+  'posix-fs-canonicalise.cc',
+  'profiles.cc',
+  'realisation.cc',
+  'remote-fs-accessor.cc',
+  'remote-store.cc',
+  's3-binary-cache-store.cc',
+  'serve-protocol-connection.cc',
+  'serve-protocol.cc',
+  'sqlite.cc',
+  'ssh-store-config.cc',
+  'ssh-store.cc',
+  'ssh.cc',
+  'store-api.cc',
+  'store-reference.cc',
+  'uds-remote-store.cc',
+  'worker-protocol-connection.cc',
+  'worker-protocol.cc',
+)
+
+include_dirs = [
+  include_directories('.'),
+  include_directories('build'),
+]
+
+headers = [config_h] +files(
+  'binary-cache-store.hh',
+  'build-result.hh',
+  'build/derivation-goal.hh',
+  'build/drv-output-substitution-goal.hh',
+  'build/goal.hh',
+  'build/substitution-goal.hh',
+  'build/worker.hh',
+  'builtins.hh',
+  'builtins/buildenv.hh',
+  'common-protocol-impl.hh',
+  'common-protocol.hh',
+  'content-address.hh',
+  'daemon.hh',
+  'derivations.hh',
+  'derived-path-map.hh',
+  'derived-path.hh',
+  'downstream-placeholder.hh',
+  'filetransfer.hh',
+  'gc-store.hh',
+  'globals.hh',
+  'indirect-root-store.hh',
+  'keys.hh',
+  'legacy-ssh-store.hh',
+  'length-prefixed-protocol-helper.hh',
+  'local-fs-store.hh',
+  'local-overlay-store.hh',
+  'local-store.hh',
+  'log-store.hh',
+  'machines.hh',
+  'make-content-addressed.hh',
+  'names.hh',
+  'nar-accessor.hh',
+  'nar-info-disk-cache.hh',
+  'nar-info.hh',
+  'outputs-spec.hh',
+  'parsed-derivations.hh',
+  'path-info.hh',
+  'path-references.hh',
+  'path-regex.hh',
+  'path-with-outputs.hh',
+  'path.hh',
+  'pathlocks.hh',
+  'posix-fs-canonicalise.hh',
+  'profiles.hh',
+  'realisation.hh',
+  'remote-fs-accessor.hh',
+  'remote-store-connection.hh',
+  'remote-store.hh',
+  's3-binary-cache-store.hh',
+  's3.hh',
+  'serve-protocol-connection.hh',
+  'serve-protocol-impl.hh',
+  'serve-protocol.hh',
+  'sqlite.hh',
+  'ssh-store-config.hh',
+  'ssh.hh',
+  'store-api.hh',
+  'store-cast.hh',
+  'store-dir-config.hh',
+  'store-reference.hh',
+  'uds-remote-store.hh',
+  'worker-protocol-connection.hh',
+  'worker-protocol-impl.hh',
+  'worker-protocol.hh',
+)
+
+if host_machine.system() == 'linux'
+  subdir('linux')
+endif
+
+if host_machine.system() == 'windows'
+  subdir('windows')
+else
+  subdir('unix')
+endif
+
+fs = import('fs')
+
+prefix = get_option('prefix')
+# For each of these paths, assume that it is relative to the prefix unless
+# it is already an absolute path (which is the default for store-dir, state-dir, and log-dir).
+path_opts = [
+  # Meson built-ins.
+  'datadir',
+  'bindir',
+  'mandir',
+  'libdir',
+  'includedir',
+  'libexecdir',
+  # Homecooked Nix directories.
+  'store-dir',
+  'state-dir',
+  'log-dir',
+]
+# For your grepping pleasure, this loop sets the following variables that aren't mentioned
+# literally above:
+# store_dir
+# state_dir
+# log_dir
+# profile_dir
+foreach optname : path_opts
+  varname = optname.replace('-', '_')
+  path = get_option(optname)
+  if fs.is_absolute(path)
+    set_variable(varname, path)
+  else
+    set_variable(varname, prefix / path)
+  endif
+endforeach
+
+# sysconfdir doesn't get anything installed to directly, and is only used to
+# tell Nix where to look for nix.conf, so it doesn't get appended to prefix.
+sysconfdir = get_option('sysconfdir')
+if not fs.is_absolute(sysconfdir)
+  sysconfdir = '/' / sysconfdir
+endif
+
+lsof = find_program('lsof', required : false)
+
+# Aside from prefix itself, each of these was made into an absolute path
+# by joining it with prefix, unless it was already an absolute path
+# (which is the default for store-dir, state-dir, and log-dir).
+cpp_str_defines = {
+  'NIX_PREFIX':    prefix,
+  'NIX_STORE_DIR': store_dir,
+  'NIX_DATA_DIR':  datadir,
+  'NIX_STATE_DIR': state_dir / 'nix',
+  'NIX_LOG_DIR':   log_dir,
+  'NIX_CONF_DIR':  sysconfdir / 'nix',
+  'NIX_BIN_DIR':   bindir,
+  'NIX_MAN_DIR':   mandir,
+}
+
+if lsof.found()
+  lsof_path = lsof.full_path()
+else
+  # Just look up on the PATH
+  lsof_path = 'lsof'
+endif
+cpp_str_defines += {
+  'LSOF': lsof_path
+}
+
+#if busybox.found()
+  cpp_str_defines += {
+#    'SANDBOX_SHELL': busybox.full_path()
+  }
+#endif
+
+cpp_args = []
+
+foreach name, value : cpp_str_defines
+  cpp_args += [
+    '-D' + name + '=' + '"' + value + '"'
+  ]
+endforeach
+
+if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
+  # See note in `../nix-util/meson.build`
+  linker_export_flags = ['-Wl,--export-all-symbols']
+else
+  linker_export_flags = []
+endif
+
+this_library = library(
+  'nixstore',
+  generated_headers,
+  sources,
+  dependencies : deps_public + deps_private + deps_other,
+  include_directories : include_dirs,
+  cpp_args : cpp_args,
+  link_args: linker_export_flags,
+  install : true,
+)
+
+install_headers(headers, subdir : 'nix', preserve_path : true)
+
+requires = deps_public
+if nix_util.type_name() == 'internal'
+  # `requires` cannot contain declared dependencies (from the
+  # subproject), so we need to do this manually
+  requires = [ 'nix-util' ] + requires
+endif
+
+import('pkgconfig').generate(
+  this_library,
+  filebase : meson.project_name(),
+  name : 'Nix',
+  description : 'Nix Package Manager',
+  subdirs : ['nix'],
+  extra_cflags : ['-std=c++2a'],
+  requires : requires,
+  requires_private : deps_private,
+  libraries_private : ['-lboost_container'],
+)
+
+meson.override_dependency(meson.project_name(), declare_dependency(
+  include_directories : include_dirs,
+  link_with : this_library,
+  compile_args : ['-std=c++2a'],
+  dependencies : [nix_util],
+))

src/libstore/meson.options

@@ -0,0 +1,25 @@
+# vim: filetype=meson
+
+option('embedded-sandbox-shell', type : 'boolean', value : false,
+  description : 'include the sandbox shell in the Nix binary',
+)
+
+option('seccomp-sandboxing', type : 'feature',
+  description : 'build support for seccomp sandboxing (recommended unless your arch doesn\'t support libseccomp, only relevant on Linux)',
+)
+
+option('sandbox-shell', type : 'string', value : 'busybox',
+  description : 'path to a statically-linked shell to use as /bin/sh in sandboxes (usually busybox)',
+)
+
+option('store-dir', type : 'string', value : '/nix/store',
+  description : 'path of the Nix store',
+)
+
+option('state-dir', type : 'string', value : '/nix/var',
+  description : 'path to store state in for Nix',
+)
+
+option('log-dir', type : 'string', value : '/nix/var/log/nix',
+  description : 'path to store logs in for Nix',
+)

src/libstore/package.nix

@@ -0,0 +1,142 @@
+{ lib
+, stdenv
+, releaseTools
+, fileset
+
+, meson
+, ninja
+, pkg-config
+
+, nix-util
+, boost
+, curl
+, aws-sdk-cpp
+, libseccomp
+, nlohmann_json
+, man
+, sqlite
+
+, busybox-sandbox-shell ? null
+
+# Configuration Options
+
+, versionSuffix ? ""
+, officialRelease ? false
+
+# Check test coverage of Nix. Probably want to use with at least
+# one of `doCheck` or `doInstallCheck` enabled.
+, withCoverageChecks ? false
+
+# Avoid setting things that would interfere with a functioning devShell
+, forDevShell ? false
+}:
+
+let
+  version = lib.fileContents ./.version + versionSuffix;
+
+  mkDerivation =
+    if withCoverageChecks
+    then
+      # TODO support `finalAttrs` args function in
+      # `releaseTools.coverageAnalysis`.
+      argsFun:
+         releaseTools.coverageAnalysis (let args = argsFun args; in args)
+    else stdenv.mkDerivation;
+in
+
+mkDerivation (finalAttrs: {
+  pname = "nix-store";
+  inherit version;
+
+  src = fileset.toSource {
+    root = ./.;
+    fileset = fileset.unions [
+      ./meson.build
+      ./meson.options
+      ./linux/meson.build
+      ./unix/meson.build
+      ./windows/meson.build
+      (fileset.fileFilter (file: file.hasExt "cc") ./.)
+      (fileset.fileFilter (file: file.hasExt "hh") ./.)
+      (fileset.fileFilter (file: file.hasExt "sb") ./.)
+      (fileset.fileFilter (file: file.hasExt "md") ./.)
+      (fileset.fileFilter (file: file.hasExt "sql") ./.)
+    ];
+  };
+
+  outputs = [ "out" "dev" ];
+
+  nativeBuildInputs = [
+    meson
+    ninja
+    pkg-config
+  ];
+
+  buildInputs = [
+    boost
+    curl
+    sqlite
+  ] ++ lib.optional stdenv.hostPlatform.isLinux libseccomp
+    # There have been issues building these dependencies
+    ++ lib.optional (stdenv.hostPlatform == stdenv.buildPlatform && (stdenv.isLinux || stdenv.isDarwin))
+      (aws-sdk-cpp.override {
+        apis = ["s3" "transfer"];
+        customMemoryManagement = false;
+      })
+  ;
+
+  propagatedBuildInputs = [
+    nix-util
+    nlohmann_json
+  ];
+
+  disallowedReferences = [ boost ];
+
+  preConfigure =
+    # "Inline" .version so it's not a symlink, and includes the suffix
+    ''
+      echo ${version} > .version
+    '';
+
+  mesonFlags = [
+    (lib.mesonEnable "seccomp-sandboxing" stdenv.hostPlatform.isLinux)
+    (lib.mesonBool "embedded-sandbox-shell" stdenv.hostPlatform.isStatic)
+  ] ++ lib.optionals stdenv.hostPlatform.isLinux [
+    (lib.mesonOption "sandbox-shell" "${busybox-sandbox-shell}/bin/busybox")
+  ];
+
+  env = {
+    # Needed for Meson to find Boost.
+    # https://github.com/NixOS/nixpkgs/issues/86131.
+    BOOST_INCLUDEDIR = "${lib.getDev boost}/include";
+    BOOST_LIBRARYDIR = "${lib.getLib boost}/lib";
+  } // lib.optionalAttrs (stdenv.isLinux && !(stdenv.hostPlatform.isStatic && stdenv.system == "aarch64-linux")) {
+    LDFLAGS = "-fuse-ld=gold";
+  };
+
+  enableParallelBuilding = true;
+
+  postInstall =
+    # Remove absolute path to boost libs that ends up in `Libs.private`
+    # by default, and would clash with out `disallowedReferences`. Part
+    # of the https://github.com/NixOS/nixpkgs/issues/45462 workaround.
+    ''
+      sed -i "$out/lib/pkgconfig/nix-store.pc" -e 's, ${lib.getLib boost}[^ ]*,,g'
+    '';
+
+  separateDebugInfo = !stdenv.hostPlatform.isStatic;
+
+  # TODO Always true after https://github.com/NixOS/nixpkgs/issues/318564
+  strictDeps = !withCoverageChecks;
+
+  hardeningDisable = lib.optional stdenv.hostPlatform.isStatic "pie";
+
+  meta = {
+    platforms = lib.platforms.unix ++ lib.platforms.windows;
+  };
+
+} // lib.optionalAttrs withCoverageChecks {
+  lcovFilter = [ "*/boost/*" "*-tab.*" ];
+
+  hardeningDisable = [ "fortify" ];
+})

src/libstore/unix/meson.build

@@ -0,0 +1,19 @@
+sources += files(
+  'build/child.cc',
+  'build/hook-instance.cc',
+  'build/local-derivation-goal.cc',
+  'pathlocks.cc',
+  'user-lock.cc',
+)
+
+include_dirs += include_directories(
+  '.',
+  'build',
+)
+
+headers += files(
+  'build/child.hh',
+  'build/hook-instance.hh',
+  'build/local-derivation-goal.hh',
+  'user-lock.hh',
+)

src/libstore/windows/meson.build

@@ -0,0 +1,11 @@
+sources += files(
+  'pathlocks.cc',
+)
+
+include_dirs += include_directories(
+  '.',
+  #'build',
+)
+
+headers += files(
+)