Very Computer

I tried to install ppp 2.2.0e with kernel 1.3.52. I ran "make kernel" as
was told in the README.linux, and then tried to compile the kernel as
told. I won't put every error message here but here's a snatch from the end:

ppp.c: In function `ppp_alloc':
ppp.c:3323: dereferencing pointer to incomplete type
ppp.c:3339: dereferencing pointer to incomplete type
ppp.c:3341: dereferencing pointer to incomplete type
ppp.c:3342: dereferencing pointer to incomplete type
ppp.c:3343: dereferencing pointer to incomplete type
ppp.c:3315: warning: `ppp' might be used uninitialized in this function
make[2]: *** [ppp.o] Error 1

There was many pages of this same kind of junk. Also the pppd compilation
bombed:
cc -g   -D_linux_=1 -DHAVE_PATHS_H   -c main.c -o main.o
In file included from /usr/include/net/ppp_defs.h:1,
                 from pppd.h:31,
                 from main.c:43:
/usr/include/linux/ppp_defs.h:99: parse error before `ext_accm'
/usr/include/linux/ppp_defs.h:99: warning: data definition has no type or
storag
e class
In file included from main.c:43:
pppd.h:69: parse error before `netmask'
pppd.h:69: warning: data definition has no type or storage class
pppd.h:114: parse error before `GetMask'
pppd.h:114: warning: parameter names (without types) in function declaration
pppd.h:114: warning: data definition has no type or storage class
In file included from main.c:44:
magic.h:23: parse error before `magic'
magic.h:23: warning: data definition has no type or storage class
In file included from main.c:46:
lcp.h:58: parse error before `u_int32_t'
lcp.h:58: warning: no semicolon at end of struct or union
lcp.h:59: warning: data definition has no type or storage class
lcp.h:61: parse error before `lqr_period'

etc.... gives a lot of similiar parse errors...

So, anyone have a clue what's going on here? I'll supply additional
information if needed... Or should I just get some earlier ppp version?

        - Mjr

Disclaimer:
The opinions expressed above are mine and (hopefully) not those of the
Microsoft Corporation (not that I have anything to do with the thing)

   There was many pages of this same kind of junk. Also the pppd compilation
   bombed:
   cc -g   -D_linux_=1 -DHAVE_PATHS_H   -c main.c -o main.o
   In file included from /usr/include/net/ppp_defs.h:1,
                    from pppd.h:31,
                    from main.c:43:
   /usr/include/linux/ppp_defs.h:99: parse error before `ext_accm'
   /usr/include/linux/ppp_defs.h:99: warning: data definition has no type or
   storag
   e class
   In file included from main.c:43:
   pppd.h:69: parse error before `netmask'
   pppd.h:69: warning: data definition has no type or storage class
   pppd.h:114: parse error before `GetMask'
   pppd.h:114: warning: parameter names (without types) in function declaration
   pppd.h:114: warning: data definition has no type or storage class
   In file included from main.c:44:
   magic.h:23: parse error before `magic'
   magic.h:23: warning: data definition has no type or storage class
   In file included from main.c:46:
   lcp.h:58: parse error before `u_int32_t'
   lcp.h:58: warning: no semicolon at end of struct or union
   lcp.h:59: warning: data definition has no type or storage class
   lcp.h:61: parse error before `lqr_period'

I had the same trouble, and fixed it with this patch.  Note that the
patch should be applied to the installed version of this file, which
is "/usr/include/linux/ppp_defs.h".

*** xfer/ppp-2.2.0e/linux/ppp_defs.h.~1~        Wed Dec 27 22:12:15 1995
--- xfer/ppp-2.2.0e/linux/ppp_defs.h    Wed Jan  3 23:25:16 1996
***************
*** 90,96 ****
  #endif
  #endif
  #else
! #include <sys/types.h>   /* This defines u_int32_t */
  #endif

  /*
--- 90,96 ----
  #endif
  #endif
  #else
! #include <sys/bitypes.h>   /* This defines u_int32_t */
  #endif

  /*

My entire system is ELF. I could not get the 1.2.13 kernel to build at all
since I did not apply the ELF patches to the thing.

I received numerious errors in building the ppp code because the define
'u_int32_t' was redeclared in the headers.

The only solution was to include the proper header file rather than defining
the value myself. I put code into the ppp_defs.h file which says

#if 0   /* << This was added */
#ifndef __BIT_TYPES_DEFINED__
#ifdef  UINT32_T
typedef UINT32_T        u_int32_t;
#else
typedef unsigned int    u_int32_t;
#endif
#endif
#else   /* << This was added */
#include <sys/types.h>   /* This defines u_int32_t */
#endif  /* << This was added */

It seems that Linus added the u_int32_t to the linux/types.h file in that
version of the kernel and this causes problems.

I do not know of a way to detect whether or not u_int32_t is defined or not
since the whole concept of types seems to be a very fluid thing.

Solution for you:

Go to the /usr/include/linux/ppp_defs.h file and change the "#if 0" to
be "#if 1".

Or, use the 1.3.53 kernel. :)

--

The above opinions do not necessarily represent those of the Management
of System Integrators nor any of its subsidiaries.