Re: Linking C libraries

Please try last version at:

ftp://ftp.inria.fr/INRIA/Projects/contraintes/gprolog/unstable/gprolog-20040608.tgz


John Badcock wrote:
> The possible bug relates to the "calling C from prolog" example in
> Section 9.1.8 of the manual, edition 1.7.
> 
> Type of machine:
> Linux localhost.localdomain 2.4.20-8 #1 Thu Mar 13 17:54:28 EST 2003
> i686 i686 i386 GNU/Linux
> 
> GNU Prolog version:
> Prolog top-Level (GNU Prolog) 1.2.16
> 
> Files are from the example in section 9.1.8 of the manual, p. 187.
> 
> examp.pl contains:
> 
> :- foreign(first_occurrence(+string,+char,-positive)).
> 
> examp_c.c contains:
> 
> #include <string.h>
> #include "gprolog.h"
> 
> Bool
> first_occurrence(char *str, long c, long *pos)
> {
>     char *p;
> 
>     p = strchr(str, c);
>     if (p == NULL)    /* C does not appear in A */
>         return FALSE; /* fail */
> 
>     *pos = p - str;   /* set the output argument */
>         return TRUE; /* succeed */
> }
> 
> Compilation as suggested in the manual produces:
> 
> [jmb@localhost GProlog]$ gplc examp.pl examp_c.c
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(atom_c.o)(.text+0x1136): In
> function `Lower_Upper_2':
> : undefined reference to `__ctype_toupper'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(atom_c.o)(.text+0x1177): In
> function `Lower_Upper_2':
> : undefined reference to `__ctype_tolower'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(le_interf_c.o)(.text+0x7b): In
> function `Add_Linedit_Completion_1':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(pred_supp.o)(.text+0xc4): In
> function `Father_Pred_Of_Aux':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(pred_supp.o)(.text+0x170): In
> function `Detect_If_Aux_Name':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(parse_supp.o)(.text+0x4c6): In
> function `Parse_Term':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(write_supp.o)(.text+0x50f): In
> function `Show_Atom':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(scan_supp.o)(.text+0xa86): more
> undefined references to `__ctype_b' follow
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a(linedit.o)(.text+0x10f6): In
> function `LE_FGets':
> : undefined reference to `__ctype_tolower'
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a(linedit.o)(.text+0x1225): In
> function `LE_FGets':
> : undefined reference to `__ctype_toupper'
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a(linedit.o)(.text+0x1cee): In
> function `LE_Get_Key':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a(terminal.o)(.text+0x250): In
> function `Parse_Env_Var':
> : undefined reference to `__ctype_b'
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a(terminal.o)(.text+0x602): In
> function `LE_Get_Char':
> : undefined reference to `__ctype_b'
> collect2: ld returned 1 exit status
> compilation failed
> 
> If the identically-named files and Makefile supplied in ExamplesC are
> used instead,
> 
> make produces the same undefined references.
> 
> The undefined references are similar to those reported by Chris
> Nettleton on 17 Mar 2005,
> 
> for a “Hello world” program.
> 
> Following a suggestion regarding undefined references (Daniel Diaz,
> users-prolog, 25 Jan 2001) a -v option was added for linking, using the
> following makefile and the short examp files listed earlier.
> 
> examp: examp.o examp_c.o
> gplc -v examp.o examp_c.o -o examp
> examp.o: examp.pl
> gplc -c examp.pl
> examp_c.o: examp_c.c
> gplc -c examp_c.c
> 
> This produced the following:
> 
> gcc -o examp /usr/lib/gprolog-1.2.16/lib/obj_begin.o examp.o examp_c.o
> /usr/lib/gprolog-1.2.16/lib/all_pl_bips.o
> /usr/lib/gprolog-1.2.16/lib/all_fd_bips.o
> /usr/lib/gprolog-1.2.16/lib/top_level.o
> /usr/lib/gprolog-1.2.16/lib/debugger.o
> /usr/lib/gprolog-1.2.16/lib/libbips_fd.a
> /usr/lib/gprolog-1.2.16/lib/libengine_fd.a
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a
> /usr/lib/gprolog-1.2.16/lib/obj_end.o
> /usr/lib/gprolog-1.2.16/lib/libengine_pl.a
> /usr/lib/gprolog-1.2.16/lib/liblinedit.a -lm
> /usr/lib/gprolog-1.2.16/lib/libbips_pl.a(atom_c.o)(.text+0x1136): In
> function `Lower_Upper_2':
> : undefined reference to `__ctype_toupper'
> 
> etc as above.
> 
> Thank you in advance for any advice you can offer.
> John.
>