From 942a710653f69e6569ad09b5a9962f966b9425ad Mon Sep 17 00:00:00 2001
From: Frederico Linhares <fred@linhares.blue>
Date: Wed, 5 Oct 2022 11:48:56 -0300
Subject: buil Configure compilatio for MinGW

---
 .gitignore                |  1 +
 Rakefile                  | 33 ++++++++++++++++++++++++++++++---
 ruby_build_config.rb      |  8 ++++++++
 ruby_build_config.rb.lock |  4 ++++
 src/rotation_3d.cpp       |  2 ++
 5 files changed, 45 insertions(+), 3 deletions(-)
 create mode 100644 ruby_build_config.rb
 create mode 100644 ruby_build_config.rb.lock

diff --git a/.gitignore b/.gitignore
index 023a29d..f1230bd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,5 @@
 candy_gear
+candy_gear.exe
 doc
 pkg
 
diff --git a/Rakefile b/Rakefile
index 69bdb84..46d6bfe 100644
--- a/Rakefile
+++ b/Rakefile
@@ -15,6 +15,12 @@
 require 'rake/clean'
 require 'rake/loaders/makefile'
 
+OS = if RUBY_PLATFORM == "x64-mingw32"
+  :windows
+else
+  :linux
+end
+
 OBJ = 'candy_gear'
 
 VERSION = '0.1.0'
@@ -48,9 +54,20 @@ LIBRARIES = [
     'SDL2_image',
     'SDL2_mixer',
     'm',
-    'vulkan',
     'yaml-cpp'
 ]
+case OS
+when :windows
+  LIBRARIES.concat([
+    'SDL2main',
+    'mingw32',
+    'vulkan-1.dll'
+  ])
+when :linux
+  LIBRARIES.concat([
+    'vulkan'
+  ])
+end
 
 CLEAN.include(
   FileList[
@@ -72,7 +89,10 @@ end
 # inside the engine to ensure all versions of the engine have precisely the
 # same features.
 file MRUBY_STATIC_LIB => ["mruby-#{MRUBY_VERSION}"] do
-  Dir.chdir("mruby-#{MRUBY_VERSION}") { `rake` }
+  Dir.chdir("mruby-#{MRUBY_VERSION}") do
+    ENV['MRUBY_CONFIG'] = '../ruby_build_config.rb'
+    `rake`
+  end
 end
 
 task :doc do
@@ -109,7 +129,14 @@ end
 task build: CPP_OBJS + SPV_FILES + [MRUBY_STATIC_LIB] do
   libs = LIBRARIES.inject('') {_1 + "-l#{_2} "}
 
-  system("g++ -o #{OBJ} #{CPP_OBJS} #{MRUBY_STATIC_LIB} #{libs}")
+  flags = ''
+  case OS
+  when :windows
+    flags = '-w -Wl,-subsystem,windows'
+  when :linux
+  end
+
+  system("g++ -o #{OBJ} #{CPP_OBJS} #{MRUBY_STATIC_LIB} #{flags} #{libs}")
 end
 
 task install: :build do
diff --git a/ruby_build_config.rb b/ruby_build_config.rb
new file mode 100644
index 0000000..3818f6e
--- /dev/null
+++ b/ruby_build_config.rb
@@ -0,0 +1,8 @@
+MRuby::Build.new do |conf|
+  conf.toolchain
+
+  conf.gembox 'default-no-stdio'
+
+  conf.enable_bintest
+  conf.enable_test
+end
diff --git a/ruby_build_config.rb.lock b/ruby_build_config.rb.lock
new file mode 100644
index 0000000..0b289fd
--- /dev/null
+++ b/ruby_build_config.rb.lock
@@ -0,0 +1,4 @@
+---
+mruby:
+  version: 3.1.0
+  release_no: 30100
diff --git a/src/rotation_3d.cpp b/src/rotation_3d.cpp
index db0ce5a..0795859 100644
--- a/src/rotation_3d.cpp
+++ b/src/rotation_3d.cpp
@@ -14,6 +14,8 @@
  * limitations under the License.
  */
 
+#define _USE_MATH_DEFINES
+
 #include "rotation_3d.hpp"
 
 #include "vector_3d.hpp"
-- 
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