From 33c7f489090c93ac9c78ee1d2ca70c9668422154 Mon Sep 17 00:00:00 2001
From: Jonas 'Sortie' Termansen <sortie@maxsi.org>
Date: Sat, 16 May 2015 14:46:26 +0200
Subject: [PATCH] Add unset variable feature to tix-build.

---
 tix/tix-build.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/tix/tix-build.cpp b/tix/tix-build.cpp
index 424e90f2..055b93f3 100644
--- a/tix/tix-build.cpp
+++ b/tix/tix-build.cpp
@@ -440,7 +440,11 @@ void Configure(metainfo_t* minfo)
 			assert(key);
 			char* assignment = strchr((char*) key, '=');
 			if ( !assignment )
+			{
+				if ( !strncmp(key, "unset ", strlen("unset ")) )
+					unsetenv(key + strlen("unset "));
 				continue;
+			}
 			*assignment = '\0';
 			char* value = assignment+1;
 			setenv(key, value, 1);
@@ -534,7 +538,11 @@ void Make(metainfo_t* minfo, const char* make_target,
 			assert(key);
 			char* assignment = strchr((char*) key, '=');
 			if ( !assignment )
+			{
+				if ( !strncmp(key, "unset ", strlen("unset ")) )
+					unsetenv(key + strlen("unset "));
 				continue;
+			}
 			*assignment = '\0';
 			char* value = assignment+1;
 			setenv(key, value, 1);