Re: Problem with compiling gengetopt on OpenSolaris

Hi Lukas

thanks for your patch!
Actually another Opensolaris user experienced this problem, which seems 
to be due to how flex library is implemented in opensolaris (by googling 
a bit I had found other similar problems, not related to gengetopt but 
to programs using flex in open solaris);  I wasn't able to find a 
solution since I can't reproduce the problem in linux (and I don't have 
opensolaris).  Yours seems to be the solution!

However, I'd like to try to get rid of the flex library which is 
basically not used by gengetopt; I'll try to provide you with a new 
version to test.

cheers
	Lorenzo

Lukas Rovensky wrote:
> Hi there,
> 
> I tried to compile gengetopt 2.22 on OpenSolaris 2008.11 (both using 
> gcc/g++ and SunStudio cc/CC) and I got the following error during linking:
> 
> g++ -g -O2 -o gengetopt parser.o scanner.o argsdef.o cmdline.o 
> gengetopt.o gm.o yyerror.o gm_utils.o fileutils.o acceptedvalues.o 
> ggos.o  ../gl/.libs/libgnu.a -lfl skels/.libs/libgen.a 
> /usr/sfw/lib/libstdc++.so -L/usr/sfw/lib -lgcc_s -lm   -Wl,-R 
> -Wl,/usr/sfw/lib -Wl,-R -Wl,/usr/sfw/lib
> ld: warning: file /usr/sfw/lib/libstdc++.so: attempted multiple 
> inclusion of file
> Undefined            first referenced
>  symbol                  in file
> yylex                               /usr/lib/libfl.so
> ld: fatal: Symbol referencing errors. No output written to gengetopt
> collect2: ld returned 1 exit status
> 
> The problem is that C++ compiler creates "mangled" symbol name for yylex:
> 
> lukas@myspulin:~/Desktop/t/gengetopt-2.22.1$ elfdump src/scanner.o | 
> grep yylex
>       [99]  0x00000828 0x000000f7  FUNC GLOB  D    0 .text 
> _Z13yylex_destroyv
>      [111]  0x000009c8 0x00000eab  FUNC GLOB  D    0 .text _Z5yylexv
> lukas@myspulin:~/Desktop/t/gengetopt-2.22.1$ elfdump src/parser.o | grep 
> yylex
>       [81]  0x00000000 0x00000000  NOTY GLOB  D    0 UNDEF _Z5yylexv
>   R_386_PC32                    0xcf2             .rel.text      _Z5yylexv
> 
> While the libfl.so expects just "yylex".  I solved this issue by 
> wrapping the lines declaring yylex function like:
> 
> #ifdef __cplusplus
>     extern "C" {
> #endif
> extern int yylex(int);
> #ifdef __cplusplus
>     }
> #endif
> 
> in the files parser.cc and scanner.cc.
> 
> However, when I compiled gengetopt on Ubuntu 8.10 then the code got 
> compiled and linked without any modifications.
> 
> Am I doing something wrong (missing some parameter for configure, etc.)? 
>  I will definitely appreciate any advise.
> 
> Another option -- would you be eventually willing to accept a simple 
> patch adding the "#ifdef __cplusplus ..." guards, so gengetopt can get 
> directly compiled on OpenSolaris?
> 
> Thanks for any help.
> 
> Kind regards,
> Lukas
> 
> 
> 
> _______________________________________________
> Help-gengetopt mailing list
> [email protected]
> http://lists.gnu.org/mailman/listinfo/help-gengetopt


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Lorenzo Bettini, PhD in Computer Science, DI, Univ. Torino
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