From 6f9eaf9e67283e0335e5960bb65ce9705848d040 Mon Sep 17 00:00:00 2001
From: Paul Kulchenko <paul@kulchenko.com>
Date: Thu, 9 Jul 2015 16:24:33 -0700
Subject: [PATCH] Add support for compilation on Windows using mingw32.

---
 CMakeLists.txt        | 5 ++++-
 Timer.c               | 4 ++--
 general.h             | 2 +-
 lib/TH/THGeneral.c    | 2 +-
 lib/TH/THGeneral.h.in | 2 +-
 lib/luaT/luaT.h       | 4 ++--
 6 files changed, 11 insertions(+), 8 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 94589997..1c555d8b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,10 +11,13 @@ SET(CMAKE_MODULE_PATH
   "${CMAKE_MODULE_PATH}")
 
 IF (NOT MSVC)
+  IF (MINGW)
+    SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=format")
+  ELSE()
     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror=implicit-function-declaration -Werror=format")
+  ENDIF(MINGW)
 ENDIF(NOT MSVC)
 
-
 # Flags
 # When using MSVC
 IF(MSVC)
diff --git a/Timer.c b/Timer.c
index 96f792a4..796190bc 100644
--- a/Timer.c
+++ b/Timer.c
@@ -1,6 +1,6 @@
 #include "general.h"
 
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
 #include <time.h>
 #else
 #include <sys/time.h>
@@ -19,7 +19,7 @@ typedef struct _Timer
     double startusertime;
     double startsystime;
 
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
   time_t base_time;
 #endif
 
diff --git a/general.h b/general.h
index da439ca6..62b17d41 100644
--- a/general.h
+++ b/general.h
@@ -7,7 +7,7 @@
 #include "luaT.h"
 #include "TH.h"
 
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
 
 #define snprintf _snprintf
 #define popen _popen
diff --git a/lib/TH/THGeneral.c b/lib/TH/THGeneral.c
index f48f28ce..03dc24b0 100644
--- a/lib/TH/THGeneral.c
+++ b/lib/TH/THGeneral.c
@@ -150,7 +150,7 @@ void THFree(void *ptr)
 
 double THLog1p(const double x)
 {
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
   volatile double y = 1 + x;
   return log(y) - ((y-1)-x)/y ;  /* cancels errors with IEEE arithmetic */
 #else
diff --git a/lib/TH/THGeneral.h.in b/lib/TH/THGeneral.h.in
index 9f118499..130feab2 100644
--- a/lib/TH/THGeneral.h.in
+++ b/lib/TH/THGeneral.h.in
@@ -89,7 +89,7 @@ do {                                                                  \
 #define THMin(X, Y)  ((X) < (Y) ? (X) : (Y))
 #define THMax(X, Y)  ((X) > (Y) ? (X) : (Y))
 
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
 # define log1p(x) THLog1p(x)
 #define snprintf _snprintf
 #define popen _popen
diff --git a/lib/luaT/luaT.h b/lib/luaT/luaT.h
index 4c25fc1c..c144b6ef 100644
--- a/lib/luaT/luaT.h
+++ b/lib/luaT/luaT.h
@@ -18,7 +18,7 @@ extern "C" {
 # endif
 #endif
 
-#ifdef _MSC_VER
+#if (defined(_MSC_VER) || defined(__MINGW32__))
 # define DLL_EXPORT __declspec(dllexport)
 # define DLL_IMPORT __declspec(dllimport)
 # ifdef luaT_EXPORTS
@@ -108,7 +108,7 @@ LUAT_API int luaT_lua_pushudata(lua_State *L);
 /* comments show what function (that you should use) they call now */
 #if (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 1))
 #define LUAT_DEPRECATED  __attribute__((__deprecated__))
-#elif defined(_MSC_VER)
+#elif (defined(_MSC_VER) || defined(__MINGW32__))
 #define LUAT_DEPRECATED __declspec(deprecated)
 #else
 #define LUAT_DEPRECATED