From e4c0168e4e8834aea0cfe06b8b2fc8bd63f591bb Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Wed, 23 Jun 2021 07:37:08 +0200
Subject: Split libcppbuild.cc into multiple files/modules.

---
 configure.cc | 153 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 153 insertions(+)
 create mode 100644 configure.cc

(limited to 'configure.cc')

diff --git a/configure.cc b/configure.cc
new file mode 100644
index 0000000..e84f808
--- /dev/null
+++ b/configure.cc
@@ -0,0 +1,153 @@
+#include "configure.h"
+
+#include <iostream>
+#include <filesystem>
+#include <fstream>
+
+#include <getoptpp/getoptpp.hpp>
+
+#include "settings.h"
+#include "execute.h"
+#include "libcppbuild.h"
+#include "tasks.h"
+
+std::filesystem::path configurationFile("configuration.cc");
+std::filesystem::path configHeaderFile("config.h");
+
+const std::map<std::string, std::string> default_configuration{};
+const std::map<std::string, std::string>& __attribute__((weak)) configuration()
+{
+	return default_configuration;
+}
+
+bool hasConfiguration(const std::string& key)
+{
+	const auto& c = configuration();
+	return c.find(key) != c.end();
+}
+
+const std::string& getConfiguration(const std::string& key,
+                                    const std::string& defaultValue)
+{
+	const auto& c = configuration();
+	if(hasConfiguration(key))
+	{
+		return c.at(key);
+	}
+
+	return defaultValue;
+}
+
+int configure(int argc, char* argv[])
+{
+	Settings settings;
+
+	settings.builddir = "build";
+
+	std::string cmd_str;
+	for(int i = 0; i < argc; ++i)
+	{
+		if(i > 0)
+		{
+			cmd_str += " ";
+		}
+		cmd_str += argv[i];
+	}
+
+	dg::Options opt;
+	int key{256};
+
+	std::string build_arch;
+	std::string host_arch;
+
+	opt.add("build-dir", required_argument, 'b',
+	        "Set output directory for build files (default: '" +
+	        settings.builddir + "').",
+	        [&]() {
+		        settings.builddir = optarg;
+		        return 0;
+	        });
+
+	opt.add("verbose", no_argument, 'v',
+	        "Be verbose. Add multiple times for more verbosity.",
+	        [&]() {
+		        settings.verbose++;
+		        return 0;
+	        });
+
+	opt.add("build", required_argument, key++,
+	        "Configure for building on specified architecture.",
+	        [&]() {
+		        build_arch = optarg;
+		        return 0;
+	        });
+
+	opt.add("host", required_argument, key++,
+	        "Cross-compile to build programs to run on specified architecture.",
+	        [&]() {
+		        host_arch = optarg;
+		        return 0;
+	        });
+
+	opt.add("help", no_argument, 'h',
+	        "Print this help text.",
+	        [&]() {
+		        std::cout << "configure usage stuff\n";
+		        opt.help();
+		        exit(0);
+		        return 0;
+	        });
+
+	opt.process(argc, argv);
+
+	if(host_arch.empty())
+	{
+		host_arch = build_arch;
+	}
+
+	auto tasks = getTasks(settings);
+
+	bool needs_cpp{false};
+	bool needs_c{false};
+	bool needs_ar{false};
+	for(const auto& task :tasks)
+	{
+		switch(task->sourceLanguage())
+		{
+		case Language::Auto:
+			std::cerr << "TargetLanguage not deduced!\n";
+			exit(1);
+			break;
+		case Language::C:
+			needs_cpp = false;
+			break;
+		case Language::Cpp:
+			needs_c = true;
+			break;
+		}
+	}
+
+	{
+		std::ofstream istr(configurationFile);
+		istr << "#include \"libcppbuild.h\"\n\n";
+		istr << "const std::map<std::string, std::string>& configuration()\n";
+		istr << "{\n";
+		istr << "	static std::map<std::string, std::string> c =\n";
+		istr << "	{\n";
+		istr << "		{ \"cmd\", \"" << cmd_str << "\" },\n";
+		istr << "		{ \"" << cfg::builddir << "\", \"" << settings.builddir << "\" },\n";
+		istr << "		{ \"" << cfg::target_cc << "\", \"/usr/bin/gcc\" },\n";
+		istr << "		{ \"" << cfg::target_cpp << "\", \"/usr/bin/g++\" },\n";
+		istr << "		{ \"" << cfg::target_ar << "\", \"/usr/bin/ar\" },\n";
+		istr << "		{ \"" << cfg::target_ld << "\", \"/usr/bin/ld\" },\n";
+		istr << "		{ \"" << cfg::host_cc << "\", \"/usr/bin/gcc\" },\n";
+		istr << "		{ \"" << cfg::host_cpp << "\", \"/usr/bin/g++\" },\n";
+		istr << "		{ \"" << cfg::host_ar << "\", \"/usr/bin/ar\" },\n";
+		istr << "		{ \"" << cfg::host_ld << "\", \"/usr/bin/ld\" },\n";
+		istr << "	};\n";
+		istr << "	return c;\n";
+		istr << "}\n";
+	}
+
+	return 0;
+}
-- 
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