[lwip-users] Compile errors with lwip 0.7.0 and contrib-20040122

[Nick Plant]

I am trying to build the unixsim program under Windows 95 using Cygwin. I am 
doing this to get familiar with lwIP before porting it to our ARM7 boards. I am 
surprised to find that when I build unixsim I get many compiler warnings and an 
error. I wonder if something is mis-configured on my system, or is there a 
problem compiling contrib-20040122 under Cygwin?

Some of the warnings are caused by the redefinition of the types u_long, u_int, 
u_short and u_char. They are defined in lwip/src/netif/ppp/ppp.h and also in 
/usr/include/sys/types.h  The definition in ppp.h is like this: 

# ifndef __u_char_defined

/* Type definitions for BSD code. */
typedef unsigned long u_long;
typedef unsigned int u_int;
typedef unsigned short u_short;
typedef unsigned char u_char;

#endif

The definition is /usr/include/sys/types.h looks like this:

#ifndef _BSDTYPES_DEFINED/* also defined in mingw/gmon.h and in 
w32api/winsock[2].h */typedef   unsigned char   u_char;typedef  unsigned short  
u_short;typedef unsigned int    u_int;typedef   unsigned long   u_long;#define 
_BSDTYPES_DEFINED#endifSo I can stop the re-definition in ppp.h by changing 
#ifndef __u_char_defined to #ifndef _BSDTYPES_DEFINED
Is this the correct way to fix it?

I get several other warnings from various lwip modules:
../../../../../lwip/src/api/sockets.c: In function 
`lwip_setsockopt':../../../../../lwip/src/api/sockets.c:1309: warning: unsigned 
int format, u32_t arg (arg 3)../../../../../lwip/src/netif/ppp/auth.c: In 
function `get_secret':../../../../../lwip/src/netif/ppp/auth.c:613: warning: 
suggest parentheses around && within ||../../../../../lwip/src/netif/ppp/vj.c: 
In function `vj_compress_tcp':../../../../../lwip/src/netif/ppp/vj.c:148: 
warning: `deltaA' might be used uninitialized in this 
function../../../../ports/unix/perf.c: In function 
`perf_print':../../../../ports/unix/perf.c:44: warning: ISO C90 does not 
support `long long'../../../../ports/unix/perf.c:44: warning: ISO C90 does not 
support `long long'../../../../ports/unix/perf.c:46: warning: ISO C90 does not 
support `long long'../../../../ports/unix/perf.c:47: warning: ISO C90 does not 
support `long long'../../../../ports/unix/perf.c:48: warning: ISO C90 does not 
support the `ll' printf length modifierapps/shell.c:67: warning: string length 
`838' is greater than the length `509' ISO C89 compilers are required to 
supportsimhost.c: In function `ping_recv':simhost.c:248: warning: unsigned int 
format, u32_t arg (arg 3)
And finally:

gcc: unrecognized option `-pthread'
I am using version gcc version 3.3.1, the version that came with cygwin. I 
would welcome any suggestions, please.

Nick


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