69fa5c199e
scons/lua.py makes use of the vestigial luadir option from commite94dcecf17. Like FindLua.cmake, scons/lua.py searches for the Lua headers and library, instead of using pkg-config like the old scons/lua.py (removed in commit9929d3ca1c) did, because even though distributions typically provide .pc files for Lua, upstream Lua doesn't. It's likely that all distributions that compile Lua as a C++ library will also provide .pc files, but this check doesn't rely on that (just as the CMake module doesn't). Unfortunately, SCons.Conftest.CheckLib() prints up to eight messages like "Checking for C++ library lua54-c++... no" until a working library name is found. Also conditionally include system Lua headers in src/lua/*.h and update documentation in src/modules/lua_README.md, src/wesnoth_lua_config.h, and src/wesnoth_lua_config.md. The two lines about "The primary commit, after replacing the sources," in src/wesnoth_lua_config.md don't make sense since the instructions were updated for submodule Lua in commitd32cfb88c4and make even less sense now with preceding commits for updating CMake modules.
69 lines
2.9 KiB
Python
69 lines
2.9 KiB
Python
# vi: syntax=python:et:ts=4
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from config_check_utils import *
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from os import environ
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from os.path import join
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import SCons.Conftest
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# Based on SCons.SConf.CheckLibWithHeader()
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def CheckLibsWithSystemHeader(context, libs, header, language) -> bool:
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res = SCons.Conftest.CheckLib(context, libs,
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header = "#include <%s>" % header, language = language)
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context.did_show_result = 1
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return not res
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def CheckLua(context, require_version):
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backup = backup_env(context.env, ["CPPPATH", "LIBPATH", "LIBS"])
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version = require_version.split(".")
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major_version = version[0]
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minor_version = version[1]
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include_subdirs_raw = [
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"",
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"lua" + major_version + minor_version,
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"lua" + major_version + "." + minor_version,
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"lua-" + major_version + "." + minor_version,
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]
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include_subdirs = []
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for include_subdir_raw in include_subdirs_raw:
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include_subdirs[len(include_subdirs):] = [include_subdir_raw,
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join("include", include_subdir_raw)]
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# Add new names here when found in distributions.
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# Debian since lua5.2 5.2.3-2 uses luaX.Y-c++:
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# https://salsa.debian.org/lua-team/lua5.2/-/commit/fa2dc77c
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# Arch since lua 5.4.4-4 uses lua++-X.Y:
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# https://gitlab.archlinux.org/archlinux/packaging/packages/lua/-/commit/4e97e19d
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libs = [
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"lua" + major_version + minor_version + "-c++",
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"lua" + major_version + "." + minor_version + "-c++",
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"lua-" + major_version + "." + minor_version + "-c++",
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"lua." + major_version + "." + minor_version + "-c++",
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"lua++" + major_version + minor_version,
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"lua++" + major_version + "." + minor_version,
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"lua++-" + major_version + "." + minor_version,
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"lua++." + major_version + "." + minor_version,
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]
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luadir = context.env.get("luadir", environ.get("LUA_DIR"))
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if luadir:
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for include_subdir in include_subdirs:
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includes = find_include([luadir], "lua.h",
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include_subdir=include_subdir, default_prefixes=False)
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for prefix, include in includes:
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context.env.Append(CPPPATH = [join(prefix, include_subdir)])
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if CheckLibsWithSystemHeader(context, libs, "lua.h", "CXX"):
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return True
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restore_env(context.env, backup)
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return False
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for include_subdir in include_subdirs:
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includes = find_include([context.env["prefix"]], "lua.h",
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include_subdir=include_subdir, default_prefixes=True)
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for prefix, include in includes:
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context.env.Append(CPPPATH = [join(prefix, include_subdir)])
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if CheckLibsWithSystemHeader(context, libs, "lua.h", "CXX"):
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return True
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restore_env(context.env, backup)
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return False
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config_checks = { "CheckLua" : CheckLua }
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