Auto-detect X11 dependency

autoconf/LICENSE.txt

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+Copyright (c) 2016 Blizzard Entertainment and individual contributors.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+  1. Redistributions of source code must retain the above copyright notice,
+     this list of conditions and the following disclaimer.
+
+  2. Redistributions in binary form must reproduce the above copyright notice,
+     this list of conditions and the following disclaimer in the documentation
+     and/or other materials provided with the distribution.
+
+  3. Neither the name of Premake nor the names of its contributors may be
+     used to endorse or promote products derived from this software without
+     specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

autoconf/api.lua

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+---
+-- Autoconfiguration.
+-- Copyright (c) 2016 Blizzard Entertainment
+-- Enhanced by re3
+---
+local p = premake
+local autoconf = p.modules.autoconf
+autoconf.cache = {}
+autoconf.parameters = ""
+
+
+---
+-- register autoconfigure api.
+---
+p.api.register {
+	name = "autoconfigure",
+	scope = "config",
+	kind = "table"
+}
+
+---
+-- Check for a particular include file.
+--
+-- @cfg      : Current config.
+-- @variable : The variable to store the result, such as 'HAVE_STDINT_H'.
+-- @filename : The header file to check for.
+---
+function check_include(cfg, variable, filename)
+	local res = autoconf.cache_compile(cfg, variable, function ()
+		p.outln('#include <' .. filename .. '>')
+		p.outln('int main(void) { return 0; }')
+	end)
+
+	if res.value then
+		autoconf.set_value(cfg, variable, 1)
+	end
+end
+
+
+---
+-- Check for size of a particular type.
+--
+-- @cfg      : Current config.
+-- @variable : The variable to use, such as 'SIZEOF_SIZE_T', this method will also add "'HAVE_' .. variable".
+-- @type     : The type to check.
+-- @headers  : An optional array of header files to include.
+-- @defines  : An optional array of defines to define.
+---
+function check_type_size(cfg, variable, type, headers, defines)
+	check_include(cfg, 'HAVE_SYS_TYPES_H', 'sys/types.h')
+	check_include(cfg, 'HAVE_STDINT_H', 'stdint.h')
+	check_include(cfg, 'HAVE_STDDEF_H', 'stddef.h')
+
+	local res = autoconf.cache_compile(cfg, variable .. cfg.platform,
+		function ()
+			if cfg.autoconf['HAVE_SYS_TYPES_H'] then
+				p.outln('#include <sys/types.h>')
+			end
+
+			if cfg.autoconf['HAVE_STDINT_H'] then
+				p.outln('#include <stdint.h>')
+			end
+
+			if cfg.autoconf['HAVE_STDDEF_H'] then
+				p.outln('#include <stddef.h>')
+			end
+
+			autoconf.include_defines(defines)
+			autoconf.include_headers(headers)
+			p.outln("")
+			p.outln("#define SIZE (sizeof(" .. type .. "))")
+			p.outln("char info_size[] =  {'I', 'N', 'F', 'O', ':', 's','i','z','e','[',")
+			p.outln("  ('0' + ((SIZE / 10000)%10)),")
+			p.outln("  ('0' + ((SIZE / 1000)%10)),")
+			p.outln("  ('0' + ((SIZE / 100)%10)),")
+			p.outln("  ('0' + ((SIZE / 10)%10)),")
+			p.outln("  ('0' +  (SIZE     %10)),")
+			p.outln("  ']', '\\0'};")
+			p.outln("")
+			p.outln("int main(int argc, char *argv[]) {")
+			p.outln("  int require = 0;")
+			p.outln("  require += info_size[argc];")
+			p.outln("  (void)argv;")
+			p.outln("  return require;")
+			p.outln("}")
+		end,
+		function (e)
+			-- if the compile step succeeded, we should have a binary with 'INFO:size[*****]'
+			-- somewhere in there.
+			local content = io.readfile(e.binary)
+			if content then
+				local size = string.find(content, 'INFO:size')
+				if size then
+					e.size = tonumber(string.sub(content, size+10, size+14))
+				end
+			end
+		end
+	)
+
+	if res.size then
+		autoconf.set_value(cfg, 'HAVE_' .. variable, 1)
+		autoconf.set_value(cfg, variable, res.size)
+	end
+end
+
+
+---
+-- Check if the given struct or class has the specified member variable
+--
+-- @cfg      : current config.
+-- @variable : variable to store the result.
+-- @type     : the name of the struct or class you are interested in
+-- @member   : the member which existence you want to check
+-- @headers  : an optional array of header files to include.
+-- @defines  : An optional array of defines to define.
+---
+function check_struct_has_member(cfg, variable, type, member, headers, defines)
+	local res = autoconf.cache_compile(cfg, variable, function ()
+		autoconf.include_defines(defines)
+		autoconf.include_headers(headers)
+		p.outln('int main(void) {')
+		p.outln('  (void)sizeof(((' .. type .. '*)0)->' .. member ..');')
+		p.outln('  return 0;')
+		p.outln('}')
+	end)
+
+	if res.value then
+		autoconf.set_value(cfg, variable, 1)
+	end
+end
+
+
+---
+-- Check if a symbol exists as a function, variable, or macro
+--
+-- @cfg      : current config.
+-- @variable : variable to store the result.
+-- @symbol   : The symbol to check for.
+-- @headers  : an optional array of header files to include.
+-- @defines  : An optional array of defines to define.
+---
+function check_symbol_exists(cfg, variable, symbol, headers, defines)
+	local h = headers
+	local res = autoconf.cache_compile(cfg, variable, function ()
+		autoconf.include_defines(defines)
+		autoconf.include_headers(headers)
+		p.outln('int main(int argc, char** argv) {')
+		p.outln('  (void)argv;')
+		p.outln('#ifndef ' .. symbol)
+		p.outln('  return ((int*)(&' .. symbol .. '))[argc];')
+		p.outln('#else')
+		p.outln('  (void)argc;')
+		p.outln('  return 0;')
+		p.outln('#endif')
+		p.outln('}')
+	end)
+
+	if res.value then
+		autoconf.set_value(cfg, variable, 1)
+	end
+end
+
+
+---
+-- try compiling a piece of c/c++
+---
+function autoconf.try_compile(cfg, cpp)
+	local ts = autoconf.toolset(cfg)
+	if ts then
+		return ts.try_compile(cfg, cpp, autoconf.parameters)
+	else
+		p.warnOnce('autoconf', 'no toolset found, autoconf always failing.')
+	end
+end
+
+
+function autoconf.cache_compile(cfg, entry, func, post)
+	if not autoconf.cache[entry] then
+		local cpp = p.capture(func)
+		local res = autoconf.try_compile(cfg, cpp)
+		if res then
+			local e = { binary = res, value = true }
+			if post then
+				post(e)
+			end
+			autoconf.cache[entry] = e
+		else
+			autoconf.cache[entry] = { }
+		end
+	end
+	return autoconf.cache[entry]
+end
+
+
+---
+-- get the current configured toolset, or the default.
+---
+function autoconf.toolset(cfg)
+	local ts = p.config.toolset(cfg)
+	if not ts then
+		local tools = {
+			-- Actually we always return nil on msc. see msc.lua
+			['vs2010']   = p.tools.msc,
+			['vs2012']   = p.tools.msc,
+			['vs2013']   = p.tools.msc,
+			['vs2015']   = p.tools.msc,
+			['vs2017']   = p.tools.msc,
+			['vs2019']   = p.tools.msc,
+			['gmake']    = premake.tools.gcc,
+			['gmake2']    = premake.tools.gcc,
+			['codelite'] = premake.tools.gcc,
+			['xcode4']    = premake.tools.clang,
+		}
+		ts = tools[_ACTION]
+	end
+	return ts
+end
+
+
+---
+-- store the value of the variable in the configuration
+---
+function autoconf.set_value(cfg, variable, value)
+	cfg.autoconf[variable] = value
+end
+
+
+---
+-- write the cfg.autoconf table to the file
+---
+function autoconf.writefile(cfg, filename)
+	if cfg.autoconf then
+		local file = io.open(filename, "w+")
+		for variable, value in pairs(cfg.autoconf) do
+			file:write('#define ' .. variable .. ' ' .. tostring(value) .. (_eol or '\n'))
+		end
+		file:close()
+	end
+end
+
+
+---
+-- Utility method to add a table of headers.
+---
+function autoconf.include_headers(headers)
+	if headers ~= nil then
+		if type(headers) == "table" then
+			for _, v in ipairs(headers) do
+				p.outln('#include <' .. v .. '>')
+			end
+		else
+			p.outln('#include <' .. headers .. '>')
+		end
+	end
+end
+
+function autoconf.include_defines(defines)
+	if defines ~= nil then
+		if type(defines) == "table" then
+			for _, v in ipairs(defines) do
+				p.outln('#define ' .. v)
+			end
+		else
+			p.outln('#define ' .. defines)
+		end
+	end
+end
+
+---
+-- attach ourselfs to the running action.
+---
+p.override(p.action, 'call', function (base, name)
+	local a = p.action.get(name)
+
+	-- store the old callback.
+	local onBaseProject = a.onProject or a.onproject
+
+	-- override it with our own.
+	a.onProject = function(prj)
+		-- go through each configuration, and call the setup configuration methods.
+		for cfg in p.project.eachconfig(prj) do
+			cfg.autoconf = {}
+			if cfg.autoconfigure then
+				verbosef('Running auto config steps for "%s/%s".', prj.name, cfg.name)
+				for file, func in pairs(cfg.autoconfigure) do
+					func(cfg)
+
+					if not (file ~= "dontWrite") then
+						os.mkdir(cfg.objdir)
+						local filename = path.join(cfg.objdir, file)
+						autoconf.writefile(cfg, filename)
+					end
+				end
+			end
+		end
+
+		-- then call the old onProject.
+		if onBaseProject then
+			onBaseProject(prj)
+		end
+	end
+
+	-- now call the original action.call methods
+	base(name)
+end)

autoconf/autoconf.lua

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+---
+-- Autoconfiguration.
+-- Copyright (c) 2016 Blizzard Entertainment
+---
+	local p = premake
+
+	if not premake.modules.autoconf then
+		p.modules.autoconf = {}
+		p.modules.autoconf._VERSION = p._VERSION
+
+		verbosef('Loading autoconf module...')
+		include('api.lua')
+		include('msc.lua')
+		include('clang.lua')
+		include('gcc.lua')
+	end
+
+	return p.modules.autoconf

autoconf/clang.lua

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+---
+-- Autoconfiguration.
+-- Copyright (c) 2016 Blizzard Entertainment
+---
+local p = premake
+local clang = p.tools.clang
+
+function clang.try_compile(cfg, text, parameters)
+	-- write the text to a temporary file.
+	local cppFile = path.join(cfg.objdir, "temp.cpp")
+	if not io.writefile(cppFile, text) then
+		return nil
+	end
+
+	if parameters == nil then
+		parameters = ""
+	end
+
+	local outFile = path.join(cfg.objdir, "temp.out")
+
+	-- compile that text file.
+	if os.execute('clang "' .. cppFile .. '" ' .. parameters .. ' -o "' .. outFile ..'" &> /dev/null') then
+		return outFile
+	else
+		return nil
+	end
+end