[screen-devel] [bug #29255] build fails on HP-UX 11.31: loadav.c:279: error: conflicting types for `nlist64'

[Alexander Gattin]

URL:
  <http://savannah.gnu.org/bugs/?29255>

                 Summary: build fails on HP-UX 11.31: loadav.c:279: error:
conflicting types for `nlist64'
                 Project: GNU Screen
            Submitted by: xrgtn
            Submitted on: Thu 18 Mar 2010 12:49:08 PM EET
                Category: Build/Install
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
                 Release: Cur Dev Sources
           Fixed Release: None
         Planned Release: None
           Work Required: None

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Details:

screen compilation fails on HP-UX:

gcc -c -I. -I.  -D_XOPEN_SOURCE=600
-DETCSCREENRC='"/comptel/ilink/xxx/etc/screenrc"'
-DSCREENENCODINGS='"/comptel/ilink/xxx/share/screen/utf8encodings"'
-DHAVE_CONFIG_H -DGIT_REV=\""`git describe --always 2>/dev/null`"\" \
             -D_XOPEN_SOURCE=600 loadav.c
loadav.c:279: error: conflicting types for `nlist64'
/usr/include/nlist.h:108: error: previous declaration of `nlist64'
make: *** [loadav.o] Error 1

The HP-UX's nlist.h contains the next:
...
#ifdef __ia64
#define nlist nlist64
#endif

#ifdef __ia64
#pragma extern nlist
#endif  

#if defined(__STDC__) || defined(__cplusplus) || defined(_PROTOTYPES)
   extern int nlist(const char* file_name, struct nlist *nl);
#else /* not __STDC__ || __cplusplus || _PROTOTYPES */
   extern int nlist();
#endif /* not __STDC__ || __cplusplus || _PROTOTYPES */

#if defined(__LP64__) || ! defined(__STDC_32_MODE__)
#  if defined(__STDC__) || defined(__cplusplus) || defined(_PROTOTYPES)
      extern int nlist64(const char* filename, struct nlist64* nl);
#  else /* not __STDC__ || __cplusplus || _PROTOTYPES */
      extern int nlist64();
#  endif /* not __STDC__ || __cplusplus || _PROTOTYPES */
#endif  
...

line #108 is the one containing 2-arg nlist64 declaration.

If I append -DNLIST_DECLARED to CFLAGS, screen compiles OK. So I suspect
there might be a problem in ./configure script...

P.S.

address@hidden:/tmp/screen/src > grep def.*NLIST config.h
/* #undef LOADAV_USE_NLIST64 */
/* #undef NLIST_DECLARED */
#define NLIST_STRUCT 1
/* #undef NLIST_NAME_UNION */
address@hidden:/tmp/screen/src > grep nlist xxx-configure.log 
checking nlist.h usability... yes
checking nlist.h presence... yes
checking for nlist.h... yes
configure: checking n_un in struct nlist...
configure: checking for nlist declaration...
address@hidden:/tmp/screen/src > 

Here you can see why AC_EGREP fails to find nlist function:

address@hidden:/tmp/screen/src > cat nlist.c 
#define NLIST_STRUCT 1
#ifdef NLIST_STRUCT
# include <nlist.h>
#else
# include <a.out.h>
#endif
address@hidden:/tmp/screen/src > cpp nlist.c | egrep
"nlist([[:space:]]+.*\(|\()"
address@hidden:/tmp/screen/src > cpp nlist.c | egrep
"nlist([[:space:]]*.*\(|\()"
   extern int nlist64(const char* file_name, struct nlist64 *nl);
      extern int nlist64(const char* filename, struct nlist64* nl);
address@hidden:/tmp/screen/src > 

Any suggestions? Can configure.in's AC_EGREP_CPP for nlist be fixed at all
(replaced with a pair of regexps)?




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