From d00a96c846dc7bad686d174aa27ad7d66da149da Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Thu, 2 Dec 2021 21:35:45 +0100
Subject: Add support for bootstrapping with custom compiler, including check
 for c++20 support.

---
 src/configure.cc | 33 ++++++++++++++++-----------------
 1 file changed, 16 insertions(+), 17 deletions(-)

(limited to 'src/configure.cc')

diff --git a/src/configure.cc b/src/configure.cc
index 37bd3cf..60c3ed6 100644
--- a/src/configure.cc
+++ b/src/configure.cc
@@ -27,18 +27,12 @@ const Configuration& __attribute__((weak)) configuration()
 
 namespace ctor
 {
-std::optional<std::string> includedir;
-std::optional<std::string> libdir;
+std::map<std::string, std::string> conf_values;
 }
 
 bool hasConfiguration(const std::string& key)
 {
-	if(key == cfg::ctor_includedir && ctor::includedir)
-	{
-		return true;
-	}
-
-	if(key == cfg::ctor_libdir && ctor::libdir)
+	if(ctor::conf_values.find(key) != ctor::conf_values.end())
 	{
 		return true;
 	}
@@ -50,14 +44,9 @@ bool hasConfiguration(const std::string& key)
 const std::string& getConfiguration(const std::string& key,
                                     const std::string& defaultValue)
 {
-	if(key == cfg::ctor_includedir && ctor::includedir)
-	{
-		return *ctor::includedir;
-	}
-
-	if(key == cfg::ctor_libdir && ctor::libdir)
+	if(ctor::conf_values.find(key) != ctor::conf_values.end())
 	{
-		return *ctor::libdir;
+		return ctor::conf_values[key];
 	}
 
 	const auto& c = configuration();
@@ -335,6 +324,18 @@ int regenerateCache(const Settings& default_settings,
 		                       newExternalConfigs.end());
 	}
 
+	// Store current values for execution in this execution context.
+	if(!ctor_includedir.empty())
+	{
+		ctor::conf_values[cfg::ctor_includedir] = ctor_includedir;
+	}
+	if(!ctor_libdir.empty())
+	{
+		ctor::conf_values[cfg::ctor_libdir] = ctor_libdir;
+	}
+	ctor::conf_values[cfg::host_cxx] = host_cxx;
+	ctor::conf_values[cfg::build_cxx] = build_cxx;
+
 	std::cout << "Writing results to: " << configurationFile.string() << "\n";
 	{
 		std::ofstream istr(configurationFile);
@@ -369,12 +370,10 @@ int regenerateCache(const Settings& default_settings,
 		if(!ctor_includedir.empty())
 		{
 			istr << "			{ \"" << cfg::ctor_includedir << "\", \"" << ctor_includedir << "\" },\n";
-			ctor::includedir = ctor_includedir;
 		}
 		if(!ctor_libdir.empty())
 		{
 			istr << "			{ \"" << cfg::ctor_libdir << "\", \"" << ctor_libdir << "\" },\n";
-			ctor::libdir = ctor_libdir;
 		}
 
 		istr << "		},\n";
-- 
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