Feature/premake linux (#689)

* Premake work in progress for linux.

* Added dump function.

* Remove examples on linux
Small warning fix.

* * Don't build render-test on linux
* Removed work around virtual destructor warning, and just used virtual dtor for simplicity
* Git ignore obj directories

* Fix premake working on windows.

* * Fix sprintf_s functions
* Make generates arg parsing more robust

* Added FloatIntUnion to avoid type punning/strong aliasing issues, and repeated union definitions.

* Work around problems building on linux with getClass claiming a strict aliasing issue.

* Fix for targetBlock appearing potentiall used unintialized to gcc.

* Linux slang link options -fPIC to make dll.

* Add -fPIC to build options on linux.

* Add -ldl for linux on slang.

* Fixes to try and get premake working with .so on linux.

* Make core compile with -fPIC

* Try to fix linux linking with --no-as-needed before -ldl

* Add rpath back.

* Remove render-gl from linux build.

* Re-add location for linux.

* Don't include <malloc.h> except on windows.

* Remove unused line to fix warning on osx.

* Remove ambiguity on OSX for operator <<.

* Fixing ambiguity with operator overloading and Int types for OSX.

* Fix ambiguity around UInt and operator

* Fix ambiguity of UInt conversion for OSX.

* Added UnambiguousInt and UnambiguousUInt to make it easier to work around OSX integer coercion for UInt/Int types.

5 files changed, 15 insertions, 4 deletions

diff --git a/tools/gfx/model.cpp b/tools/gfx/model.cpp
index 62e6ec1fd..ce176727b 100644
--- a/tools/gfx/model.cpp
+++ b/tools/gfx/model.cpp
@@ -195,6 +195,11 @@ RefPtr<TextureResource> loadTextureImage(
     return texture;
 }
 
+static std::string makeString(const char* start, const char* end)
+{
+    return std::string(start, size_t(end - start));
+}
+
 Result ModelLoader::load(
     char const* inputPath,
     void**      outModel)
@@ -208,7 +213,7 @@ Result ModelLoader::load(
     std::string baseDir;
     if( auto lastSlash = strrchr(inputPath, '/') )
     {
-        baseDir = std::string(inputPath, lastSlash);
+        baseDir = makeString(inputPath, lastSlash);
     }
 
     std::string diagnostics;
diff --git a/tools/gfx/model.h b/tools/gfx/model.h
index b92dfda76..17b16510e 100644
--- a/tools/gfx/model.h
+++ b/tools/gfx/model.h
@@ -5,6 +5,7 @@
 #include "vector-math.h"
 
 #include <vector>
+#include <string>
 
 namespace gfx {
 
diff --git a/tools/gfx/render.h b/tools/gfx/render.h
index f59a5ef9f..bfbe0f82a 100644
--- a/tools/gfx/render.h
+++ b/tools/gfx/render.h
@@ -5,6 +5,8 @@
 
 //#include "shader-input-layout.h"
 
+#include <float.h>
+
 #include "../../slang-com-helper.h"
 
 #include "../../source/core/smart-pointer.h"
@@ -424,6 +426,10 @@ class TextureResource: public Resource
     Desc m_desc;
 };
 
+// Needed for building on cygwin with gcc
+#undef Always
+#undef None
+
 enum class ComparisonFunc : uint8_t
 {
     Never           = 0,
diff --git a/tools/gfx/window.cpp b/tools/gfx/window.cpp
index 8456e1ead..9e2195141 100644
--- a/tools/gfx/window.cpp
+++ b/tools/gfx/window.cpp
@@ -1,6 +1,5 @@
 // window.cpp
 #include "window.h"
-#pragma once
 
 #include <stdio.h>
 
diff --git a/tools/gfx/window.h b/tools/gfx/window.h
index e154acec3..e6f886f42 100644
--- a/tools/gfx/window.h
+++ b/tools/gfx/window.h
@@ -5,7 +5,7 @@
 
 namespace gfx {
 
-typedef struct Window Window;
+struct Window;
 
 enum class KeyCode
 {
@@ -94,7 +94,7 @@ int runApplication(
 
 #define GFX_CONSOLE_MAIN(APPLICATION_ENTRY)  \
     int main(int argc, char** argv) {       \
-        return gfx::runApplication(&(APPLIATION_ENTRY), argc, argv); \
+        return gfx::runApplication(&(APPLICATION_ENTRY), argc, argv); \
     }
 
 #ifdef _WIN32