Omnetpp 4.5b1 source building issue

[Paul D.]

Hello,

I'm currently trying to build Omnetpp 4.5b1 on Scientific Linux 5 with a Red Hat-like kernel, yet I get an issue while building sources:

/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Creating executable: /root/.Trash/omnetpp-4.5b1/out/gcc-release/src/nedxml/nedtool
/root/.Trash/omnetpp-4.5b1/lib/gcc/liboppnedxml.so: undefined reference to `ned2yylex_destroy()'
/root/.Trash/omnetpp-4.5b1/lib/gcc/liboppnedxml.so: undefined reference to `ned1yylex_destroy()'
/root/.Trash/omnetpp-4.5b1/lib/gcc/liboppnedxml.so: undefined reference to `msg2yylex_destroy()'
collect2: ld returned 1 exit status
make[2]: *** [/root/.Trash/omnetpp-4.5b1/out/gcc-release/src/nedxml/nedtool] Error 1
make[2]: Leaving directory `/root/.Trash/omnetpp-4.5b1/src/nedxml'
make[1]: *** [nedxml] Error 2
make[1]: Leaving directory `/root/.Trash/omnetpp-4.5b1'
make: *** [allmodes] Error 2
/////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////


If you lack of info about my config feel free to ask.
Just assume that I follow the install instructions in Install Guide for Red Hat.

Thanks a lot for further help.

[Paul D.]

Hello again,

I solved my problem using flex 2.5.35 instead of the installed flex 2.5.4a which seems to be the problem. 

[Holger Karl]

Hi 

same problem for me, with Omnetpp 4.5. Is it possible that this relates to the various shift/reduce conflicts that are reported? (Which should never happen in a proper grammar in any case) 

(BTW, Paul's answer is not helpful - the NEW flex 2.5.4 does not work, the old one did work for the original poster. I am not going to install software that old like flex 2.5.35; this really seems like an omnet bug.) 

Thanks and best, 

Holger 

[Rudolf Hornig]

Flex 2.5.4 is NOT a "new" version. It's more than 10 years old. On the other hand 2.3.35 is newer and does work with omnet.

[Holger Karl]

My apologies, I misread 2.5.35 for 2.*3*.35... 

Yes, it seems to work with the most recent sourceforge version of flex 

best, 

HK 

[Shridhar Shetty]

same problem i am facing but it's not solving using flex 2.5.35