Build libraries of libwebsockets 3.1 with Visual Studio 2010 on 64-bit Windows 7 (2)

    After build files are created by CMake, you can open the folder C:\Temp\libwebsokets\libwebsockets\build. After double-clicking the libwebsockets.sln file icon, Visual Studio 2010 IDE will startup and load the solution.

 

    Change the solution config to Release:

 

    If you press F7 to build the solution, you will see many warning and errors. You may do the following:
1) Error: Cannot open include file: 'inttypes.h': No such file or directory.
    'inttypes.h' is not included in Visual Studio 2010. It is included in Visual Studio 2015 or higher version. Fortunately, a programmer provided an implementation in his blog. The website is: http://www.cnblogs.com/zyl910/archive/2012/08/08/c99int.html . 'inttypes.h' can be created manually by pasting his codes. It is suggest copying the 'inttypes.h' file to the default include directory of Visual Studio 2010, which is ' C:\Microsoft Visual Studio 10.0\VC\include'. The file content is:

// Note: this file is copied from http://www.cnblogs.com/zyl910/archive/2012/08/08/c99int.html

#ifndef _STDINT_H_ALL_
#define _STDINT_H_ALL_

// _STDINT_H_SYS_: 编译器是否提供了<stdint.h>
#undef _STDINT_H_SYS_
#if defined(__GNUC__)    // GCC.
    #define _STDINT_H_SYS_
#elif defined(_MSC_VER)    // MSVC. VC6至VC2005均没有, 似乎从VC2010才支持的.
    #if _MSC_VER >=1600    // VC2010
        #define _STDINT_H_SYS_
    #endif    // #if _MSC_VER >=1600    // VC2010
#elif defined(__BORLANDC__)    // BCB. BCB6是支持的.
    #if __BORLANDC__ >=0x0560    // BCB6
        #define _STDINT_H_SYS_
    #endif    // #if __BORLANDC__ >=0x0560    // BCB6
#else
    #define _INTTYPES_H_SYS_    // 假设其他编译器支持C99.
#endif    // _STDINT_H_SYS_


#ifdef _STDINT_H_SYS_
// 使用编译器提供的<stdint.h>
#include <stdint.h>
#else
// 采用自定义的stdint.h. 参考了 msinttypes: http://code.google.com/p/msinttypes/
#ifndef _MSC_STDINT_H_ // [
#define _MSC_STDINT_H_

#include <limits.h>

// For Visual Studio 6 in C++ mode and for many Visual Studio versions when
// compiling for ARM we should wrap <wchar.h> include with 'extern "C++" {}'
// or compiler give many errors like this:
//   error C2733: second C linkage of overloaded function 'wmemchr' not allowed
//#ifdef __cplusplus
//extern "C" {
//#endif
//#  include <wchar.h>
//#ifdef __cplusplus
//}
//#endif
// 在VC6下测试时, 发现上面的方法会报告很多C2733错误. 还是直接include算了.
#include <wchar.h>

// Define _W64 macros to mark types changing their size, like intptr_t.
#ifndef _W64
#  if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
#     define _W64 __w64
#  else
#     define _W64
#  endif
#endif


// 7.18.1 Integer types

// 7.18.1.1 Exact-width integer types

// Visual Studio 6 and Embedded Visual C++ 4 doesn't
// realize that, e.g. char has the same size as __int8
// so we give up on __intX for them.
#if (_MSC_VER < 1300)
   typedef signed char       int8_t;
   typedef signed short      int16_t;
   typedef signed int        int32_t;
   typedef unsigned char     uint8_t;
   typedef unsigned short    uint16_t;
   typedef unsigned int      uint32_t;
#else
   typedef signed __int8     int8_t;
   typedef signed __int16    int16_t;
   typedef signed __int32    int32_t;
   typedef unsigned __int8   uint8_t;
   typedef unsigned __int16  uint16_t;
   typedef unsigned __int32  uint32_t;
#endif
typedef signed __int64       int64_t;
typedef unsigned __int64     uint64_t;


// 7.18.1.2 Minimum-width integer types
typedef int8_t    int_least8_t;
typedef int16_t   int_least16_t;
typedef int32_t   int_least32_t;
typedef int64_t   int_least64_t;
typedef uint8_t   uint_least8_t;
typedef uint16_t  uint_least16_t;
typedef uint32_t  uint_least32_t;
typedef uint64_t  uint_least64_t;

// 7.18.1.3 Fastest minimum-width integer types
typedef int8_t    int_fast8_t;
typedef int16_t   int_fast16_t;
typedef int32_t   int_fast32_t;
typedef int64_t   int_fast64_t;
typedef uint8_t   uint_fast8_t;
typedef uint16_t  uint_fast16_t;
typedef uint32_t  uint_fast32_t;
typedef uint64_t  uint_fast64_t;

// 7.18.1.4 Integer types capable of holding object pointers
#ifdef _WIN64 // [
   typedef signed __int64    intptr_t;
   typedef unsigned __int64  uintptr_t;
#else // _WIN64 ][
   typedef _W64 signed int   intptr_t;
   typedef _W64 unsigned int uintptr_t;
#endif // _WIN64 ]

// 7.18.1.5 Greatest-width integer types
typedef int64_t   intmax_t;
typedef uint64_t  uintmax_t;


// 7.18.2 Limits of specified-width integer types

#if !defined(__cplusplus) || defined(__STDC_LIMIT_MACROS) // [   See footnote 220 at page 257 and footnote 221 at page 259

// 7.18.2.1 Limits of exact-width integer types
#define INT8_MIN     ((int8_t)_I8_MIN)
#define INT8_MAX     _I8_MAX
#define INT16_MIN    ((int16_t)_I16_MIN)
#define INT16_MAX    _I16_MAX
#define INT32_MIN    ((int32_t)_I32_MIN)
#define INT32_MAX    _I32_MAX
#define INT64_MIN    ((int64_t)_I64_MIN)
#define INT64_MAX    _I64_MAX
#define UINT8_MAX    _UI8_MAX
#define UINT16_MAX   _UI16_MAX
#define UINT32_MAX   _UI32_MAX
#define UINT64_MAX   _UI64_MAX

// 7.18.2.2 Limits of minimum-width integer types
#define INT_LEAST8_MIN    INT8_MIN
#define INT_LEAST8_MAX    INT8_MAX
#define INT_LEAST16_MIN   INT16_MIN
#define INT_LEAST16_MAX   INT16_MAX
#define INT_LEAST32_MIN   INT32_MIN
#define INT_LEAST32_MAX   INT32_MAX
#define INT_LEAST64_MIN   INT64_MIN
#define INT_LEAST64_MAX   INT64_MAX
#define UINT_LEAST8_MAX   UINT8_MAX
#define UINT_LEAST16_MAX  UINT16_MAX
#define UINT_LEAST32_MAX  UINT32_MAX
#define UINT_LEAST64_MAX  UINT64_MAX

// 7.18.2.3 Limits of fastest minimum-width integer types
#define INT_FAST8_MIN    INT8_MIN
#define INT_FAST8_MAX    INT8_MAX
#define INT_FAST16_MIN   INT16_MIN
#define INT_FAST16_MAX   INT16_MAX
#define INT_FAST32_MIN   INT32_MIN
#define INT_FAST32_MAX   INT32_MAX
#define INT_FAST64_MIN   INT64_MIN
#define INT_FAST64_MAX   INT64_MAX
#define UINT_FAST8_MAX   UINT8_MAX
#define UINT_FAST16_MAX  UINT16_MAX
#define UINT_FAST32_MAX  UINT32_MAX
#define UINT_FAST64_MAX  UINT64_MAX

// 7.18.2.4 Limits of integer types capable of holding object pointers
#ifdef _WIN64 // [
#  define INTPTR_MIN   INT64_MIN
#  define INTPTR_MAX   INT64_MAX
#  define UINTPTR_MAX  UINT64_MAX
#else // _WIN64 ][
#  define INTPTR_MIN   INT32_MIN
#  define INTPTR_MAX   INT32_MAX
#  define UINTPTR_MAX  UINT32_MAX
#endif // _WIN64 ]

// 7.18.2.5 Limits of greatest-width integer types
#define INTMAX_MIN   INT64_MIN
#define INTMAX_MAX   INT64_MAX
#define UINTMAX_MAX  UINT64_MAX

// 7.18.3 Limits of other integer types

#ifdef _WIN64 // [
#  define PTRDIFF_MIN  _I64_MIN
#  define PTRDIFF_MAX  _I64_MAX
#else  // _WIN64 ][
#  define PTRDIFF_MIN  _I32_MIN
#  define PTRDIFF_MAX  _I32_MAX
#endif  // _WIN64 ]

#define SIG_ATOMIC_MIN  INT_MIN
#define SIG_ATOMIC_MAX  INT_MAX

#ifndef SIZE_MAX // [
#  ifdef _WIN64 // [
#     define SIZE_MAX  _UI64_MAX
#  else // _WIN64 ][
#     define SIZE_MAX  _UI32_MAX
#  endif // _WIN64 ]
#endif // SIZE_MAX ]

// WCHAR_MIN and WCHAR_MAX are also defined in <wchar.h>
#ifndef WCHAR_MIN // [
#  define WCHAR_MIN  0
#endif  // WCHAR_MIN ]
#ifndef WCHAR_MAX // [
#  define WCHAR_MAX  _UI16_MAX
#endif  // WCHAR_MAX ]

#define WINT_MIN  0
#define WINT_MAX  _UI16_MAX

#endif // __STDC_LIMIT_MACROS ]


// 7.18.4 Limits of other integer types

#if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS) // [   See footnote 224 at page 260

// 7.18.4.1 Macros for minimum-width integer constants

#define INT8_C(val)  val##i8
#define INT16_C(val) val##i16
#define INT32_C(val) val##i32
#define INT64_C(val) val##i64

#define UINT8_C(val)  val##ui8
#define UINT16_C(val) val##ui16
#define UINT32_C(val) val##ui32
#define UINT64_C(val) val##ui64

// 7.18.4.2 Macros for greatest-width integer constants
#define INTMAX_C   INT64_C
#define UINTMAX_C  UINT64_C

#endif // __STDC_CONSTANT_MACROS ]


#endif // _MSC_STDINT_H_ ]

#endif // #ifdef _STDINT_H_SYS_

#endif // #ifndef _STDINT_H_ALL_

2) Warning: “snprintf” undefined; assuming extern returning int.
    'snpritf' function is not defined in Visual Studio 2010, but it is used in four files: client.c, client-handshake.c, logs.c, header.c. Luckily, a programmer provided an implementation in Stack Overflow: https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010 . So a simple and rough solution is to insert the following code snippet into each beginning of the four files: client.c, client-handshake.c, logs.c, header.c.

// Note: the code snippet is copied from https://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010

#if defined(_MSC_VER) && _MSC_VER < 1900

#ifndef snprintf
  #define snprintf c99_snprintf
#endif

#ifndef vsnprintf
  #define vsnprintf c99_vsnprintf
#endif

static int c99_vsnprintf(char *outBuf, size_t size, const char *format, va_list ap)
{
    int count = -1;

    if (size != 0)
        count = _vsnprintf_s(outBuf, size, _TRUNCATE, format, ap);
    if (count == -1)
        count = _vscprintf(format, ap);

    return count;
}

static int c99_snprintf(char *outBuf, size_t size, const char *format, ...)
{
    int count;
    va_list ap;

    va_start(ap, format);
    count = c99_vsnprintf(outBuf, size, format, ap);
    va_end(ap);

    return count;
}

#endif

 

3) C:\Temp\libwebsokets\libwebsockets\build\lws_config_private.h : warning C4819: The file contains a character that cannot be represented in the current codepage (936). Save the file in Unicode format to prevent data loss.
    This is a strange warning. It's easy to remove it. Open the file ' lws_config_private.h' with notepad.exe, save it in ANSI encode format and overwrite the original file.  

 

 

4) Some errors in ' C:\myWork\libwebsockets\libwebsockets\test-apps\test-client.c':

 

  The declaration of variables should be placed at the beginning of the function, so the function should be modified as follows: move the declarations of 'param', 'store', 'lookup' to the beginning of function ' callback_dumb_increment( )'. Remove the declaration of variable 'n' since it has been declared at the beginning of the function.

 

 

 

    In a word, the source codes needed to be modified are in the following five files: header.c, logs.c, client-handshake.c, client.c, test-client.c , and the encoding of file lws_config_private.h needs to be modified.

    When all modifications above are completed, you can press Ctrl+Alt+F7 to rebuild the solution, the output is:
Rebuild All : 7 succeeded , 0 failed , 3 skipped.

 

    The headers files are put into the path ' C:\Temp\libwebsokets\libwebsockets\build\include'.

 

    The import library 'websockets.lib' and the static library ' websockets_static.lib' are put into the path ' C:\Temp\libwebsokets\libwebsockets\build\lib\Release'.

 

    The dynamic library 'websockets.dll' is put into the path ' C:\Temp\libwebsokets\libwebsockets\build\bin\Release'.