From 2cda677d06c43b9405e42cc6cc96589941b1e210 Mon Sep 17 00:00:00 2001
From: Pablo Sanabria <pablo.s.q1.4.1991@gmail.com>
Date: Sat, 25 Mar 2017 16:31:22 -0300
Subject: [PATCH] Fix CMake Build process for MinGW and MSYS2

This fix includes some fixes for config.h.win32 that was generating
some compiling errors on MinGW64 and also fix CMakeLists.txt in order to
give better support to MinGW and MSYS2
---
 CMakeLists.txt | 15 +++++++++++++++
 config.h.win32 | 28 ++++++++++++++++++++++++----
 2 files changed, 39 insertions(+), 4 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8ae09504b9..4cd9e2ed67 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,6 +10,21 @@ if(MSVC)
   file(RENAME ${CMAKE_CURRENT_BINARY_DIR}/include/config.h.win32 ${CMAKE_CURRENT_BINARY_DIR}/include/config.h)
   file(COPY ./json_config.h.win32 DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/)
   file(RENAME ${CMAKE_CURRENT_BINARY_DIR}/include/json_config.h.win32 ${CMAKE_CURRENT_BINARY_DIR}/include/json_config.h)
+elseif(MINGW)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror -D_GNU_SOURCE=1")
+  set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror -D_GNU_SOURCE=1")
+  if (MSYS OR CMAKE_GENERATOR STREQUAL "Unix Makefiles")
+    execute_process(COMMAND echo ${CMAKE_CURRENT_SOURCE_DIR} WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+    execute_process(COMMAND sh autogen.sh WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+    execute_process(COMMAND sh ./configure WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR})
+    file(COPY ./config.h DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/)
+    file(COPY ./json_config.h DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/)
+  else()
+    file(COPY ./config.h.win32 DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/)
+    file(RENAME ${CMAKE_CURRENT_BINARY_DIR}/include/config.h.win32 ${CMAKE_CURRENT_BINARY_DIR}/include/config.h)
+    file(COPY ./json_config.h.win32 DESTINATION ${CMAKE_CURRENT_BINARY_DIR}/include/)
+    file(RENAME ${CMAKE_CURRENT_BINARY_DIR}/include/json_config.h.win32 ${CMAKE_CURRENT_BINARY_DIR}/include/json_config.h)
+  endif()
 elseif(UNIX)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
   set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Werror")
diff --git a/config.h.win32 b/config.h.win32
index e721aaf7d7..2a70a9cc0d 100644
--- a/config.h.win32
+++ b/config.h.win32
@@ -8,24 +8,24 @@
 
 /* Define to 1 if you have the declaration of `INFINITY', and to 0 if you
    don't. */
-#if defined(_MSC_VER) && _MSC_VER >= 1800
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
 #define HAVE_DECL_INFINITY 1
 #endif
 
 /* Define to 1 if you have the declaration of `isinf', and to 0 if you don't.
    */
-#if defined(_MSC_VER) && _MSC_VER >= 1800
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
 #define HAVE_DECL_ISINF 1
 #endif
 
 /* Define to 1 if you have the declaration of `isnan', and to 0 if you don't.
    */
-#if defined(_MSC_VER) && _MSC_VER >= 1800
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
 #define HAVE_DECL_ISNAN 1
 #endif
 
 /* Define to 1 if you have the declaration of `nan', and to 0 if you don't. */
-#if defined(_MSC_VER) && _MSC_VER >= 1800
+#if (defined(_MSC_VER) && _MSC_VER >= 1800) || defined(__MINGW32__)
 #define HAVE_DECL_NAN 1
 #endif
 
@@ -76,7 +76,11 @@
 #define HAVE_SETLOCALE 1
 
 /* Define to 1 if you have the `snprintf' function. */
+#if defined(__MINGW32__)
+#define HAVE_SNPRINTF 1
+#else
 #undef HAVE_SNPRINTF
+#endif
 
 /* Define to 1 if you have the <stdarg.h> header file. */
 #define HAVE_STDARG_H 1
@@ -103,7 +107,11 @@
 #define HAVE_STRING_H 1
 
 /* Define to 1 if you have the `strncasecmp' function. */
+#if defined(__MINGW32__)
+#define HAVE_STRNCASECMP 1
+#else
 #undef HAVE_STRNCASECMP
+#endif
 
 /* Define to 1 if you have the <syslog.h> header file. */
 #undef HAVE_SYSLOG_H
@@ -112,7 +120,11 @@
 #define HAVE_SYS_CDEFS_H 1
 
 /* Define to 1 if you have the <sys/param.h> header file. */
+#if defined(__MINGW32__)
+#define HAVE_SYS_PARAM_H 1
+#else
 #undef HAVE_SYS_PARAM_H
+#endif
 
 /* Define to 1 if you have the <sys/stat.h> header file. */
 #define HAVE_SYS_STAT_H 1
@@ -121,10 +133,18 @@
 #define HAVE_SYS_TYPES_H 1
 
 /* Define to 1 if you have the <unistd.h> header file. */
+#if defined(__MINGW32__)
+#define HAVE_UNISTD_H 1
+#else
 #undef HAVE_UNISTD_H
+#endif
 
 /* Define to 1 if you have the `vasprintf' function. */
+#if defined(__MINGW32__)
+#define HAVE_VASPRINTF 1
+#else
 #undef HAVE_VASPRINTF
+#endif
 
 /* Define to 1 if you have the `vprintf' function. */
 #define HAVE_VPRINTF 1