From a94e477f7fb924c4fc5db3bfc9089f8a65bffa58 Mon Sep 17 00:00:00 2001
From: Sam Hocevar <sam@hocevar.net>
Date: Fri, 11 Aug 2017 19:07:37 +0200
Subject: [PATCH] Parse build.config in configure.ac.

This gives us a reasonably cross-platform way to to build options. Works
well with LolRemez, where we no longer depend on GUI libraries.
---
 build/autotools/m4/lol-subproject.m4 | 20 +++++++++++++++++++-
 1 file changed, 19 insertions(+), 1 deletion(-)

diff --git a/build/autotools/m4/lol-subproject.m4 b/build/autotools/m4/lol-subproject.m4
index 30c2df2f..bef18e40 100644
--- a/build/autotools/m4/lol-subproject.m4
+++ b/build/autotools/m4/lol-subproject.m4
@@ -15,12 +15,30 @@ dnl
 # ---------------------
 AC_DEFUN([LOL_AC_SUBPROJECT], [
 
+dnl
+dnl  Parse build.config if present
+dnl
+
+AC_MSG_WARN([${srcdir}])
+ac_lol_configure_args=""
+if test -f ${srcdir}/build.config; then
+  for x in `sed -ne 's,.*<enable_\(@<:@^>@:>@*\)>\(@<:@^<@:>@*\)</enable_@<:@^>@:>@*>.*,\1=\2,p' ${srcdir}/build.config`; do
+    eval "enable_${x}"
+    case ${x} in
+      *=no)  arg="--disable-${x%=no}" ;;
+      *=yes) arg="--enable-${x%=yes}" ;;
+      *) arg="" ;;
+    esac
+    ac_lol_configure_args="${ac_lol_configure_args} ${arg}"
+  done
+fi
+
 dnl
 dnl  Build and configure Lol Engine before our repository
 dnl  Ensure $lol_srcdir and $lol_builddir are properly set
 dnl
 
-ac_configure_args="${ac_configure_args} --enable-subproject $1"
+ac_configure_args="${ac_configure_args} --enable-subproject ${ac_lol_configure_args} $1"
 AC_CONFIG_SUBDIRS([lol])
 AC_SUBST(lol_srcdir, '${top_srcdir}/lol')
 AC_SUBST(lol_builddir, '${top_builddir}/lol')