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://*.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://*.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'.