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rename: build-utils-meson -> nix-meson-build-support

Fix a footgun. In my case, I had a couple of build ("output")
directories sitting around.

    rm -rf build-*

Was confused for a bit why a meson.build file was missing.

Probably also helps with autocompletion.

I tried meson-build-support first, but I had to add something like
a nix- prefix, in order to make meson happy. They've reserved the
meson- prefix.
This commit is contained in:
Robert Hensing 2024-12-09 16:39:48 +01:00
parent 3081e7ce90
commit d0b4db924a
92 changed files with 178 additions and 178 deletions

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# 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
add_project_arguments(
'-Wdeprecated-copy',
'-Werror=suggest-override',
'-Werror=switch',
'-Werror=switch-enum',
'-Werror=unused-result',
'-Wignored-qualifiers',
'-Wimplicit-fallthrough',
'-Wno-deprecated-declarations',
language : 'cpp',
)
if get_option('buildtype') not in ['debug']
add_project_arguments('-O3', language : 'cpp')
endif

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# These are private dependencies with pkg-config files. What private
# means is that the dependencies are used by the library but they are
# *not* used (e.g. `#include`-ed) in any installed header file, and only
# in regular source code (`*.cc`) or private, uninstalled headers. They
# are thus part of the *implementation* of the library, but not its
# *interface*.
#
# See `man pkg-config` for some details.
deps_private = [ ]
# These are public dependencies with pkg-config files. Public is the
# opposite of private: these dependencies are used in installed header
# files. They are part of the interface (and implementation) of the
# library.
#
# N.B. This concept is mostly unrelated to our own concept of a public
# (stable) API, for consumption outside of the Nix repository.
# `libnixutil` is an unstable C++ library, whose public interface is
# likewise unstable. `libutilc` conversely is a hopefully-soon stable
# C library, whose public interface --- including public but not private
# dependencies --- will also likewise soon be stable.
#
# N.B. For distributions that care about "ABI" stability and not just
# "API" stability, the private dependencies also matter as they can
# potentially affect the public ABI.
deps_public = [ ]
# These are subproject deps (type == "internal"). They are other
# packages in `/src` in this repo. The private vs public distinction is
# the same as above.
deps_private_subproject = [ ]
deps_public_subproject = [ ]
# These are dependencencies without pkg-config files. Ideally they are
# just private, but they may also be public (e.g. boost).
deps_other = [ ]

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if host_machine.system() == 'cygwin' or host_machine.system() == 'windows'
# Windows DLLs are stricter about symbol visibility than Unix shared
# objects --- see https://gcc.gnu.org/wiki/Visibility for details.
# This is a temporary sledgehammer to export everything like on Unix,
# and not detail with this yet.
#
# TODO do not do this, and instead do fine-grained export annotations.
linker_export_flags = ['-Wl,--export-all-symbols']
else
linker_export_flags = []
endif

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requires_private = []
foreach dep : deps_private_subproject
requires_private += dep.name()
endforeach
requires_private += deps_private
requires_public = []
foreach dep : deps_public_subproject
requires_public += dep.name()
endforeach
requires_public += deps_public
extra_pkg_config_variables = get_variable('extra_pkg_config_variables', {})
import('pkgconfig').generate(
this_library,
filebase : meson.project_name(),
name : 'Nix',
description : 'Nix Package Manager',
subdirs : ['nix'],
extra_cflags : ['-std=c++2a'],
requires : requires_public,
requires_private : requires_private,
libraries_private : libraries_private,
variables : extra_pkg_config_variables,
)
meson.override_dependency(meson.project_name(), declare_dependency(
include_directories : include_dirs,
link_with : this_library,
compile_args : ['-std=c++2a'],
dependencies : deps_public_subproject + deps_public,
variables : extra_pkg_config_variables,
))

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bash = find_program('bash', native: true)
gen_header = generator(
bash,
arguments : [ '-c', '{ echo \'R"__NIX_STR(\' && cat @INPUT@ && echo \')__NIX_STR"\'; } > "$1"', '_ignored_argv0', '@OUTPUT@' ],
output : '@PLAINNAME@.gen.hh',
)

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# Check if -latomic is needed
# This is needed for std::atomic on some platforms
# We did not manage to test this reliably on all platforms, so we hardcode
# it for now.
if host_machine.cpu_family() == 'arm'
deps_other += cxx.find_library('atomic')
endif

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foreach maybe_subproject_dep : deps_private_maybe_subproject
if maybe_subproject_dep.type_name() == 'internal'
deps_private_subproject += maybe_subproject_dep
# subproject sadly no good for pkg-config module
deps_other += maybe_subproject_dep
else
deps_private += maybe_subproject_dep
endif
endforeach
foreach maybe_subproject_dep : deps_public_maybe_subproject
if maybe_subproject_dep.type_name() == 'internal'
deps_public_subproject += maybe_subproject_dep
# subproject sadly no good for pkg-config module
deps_other += maybe_subproject_dep
else
deps_public += maybe_subproject_dep
endif
endforeach

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if host_machine.system() == 'windows'
# https://learn.microsoft.com/en-us/cpp/porting/modifying-winver-and-win32-winnt?view=msvc-170
# #define _WIN32_WINNT_WIN8 0x0602
# We currently don't use any API which requires higher than this.
add_project_arguments([ '-D_WIN32_WINNT=0x0602' ], language: 'cpp')
endif