informix and compilation 4GL

Hi everybody, I want to compile a 4gl program : the executable files were created, but during the compilation, I have some error messages. These the references of my products : IDS RDS LINUX (for a LINUX 2.2.5 GLIBC 2.1.1) 4GL LINUX (for a 2.0.34 GLIBC 2.0.7) I work on Red Hat 6 (2.2.5 GLIBC 2.1.1) Do you think that the problem can be caused by the GLIBC ? IS there any solution ? Can I put on my linux computer two versions of GLIBC ? Informix soll to me all of these versions of RDS and 4GL, and i don't think (I hope !) that the GLIBC is the problem. But we never know !!!!! Thank you !! Please, It's very urgent !! Here is a part of the message : B_PFGP.ec: In function `r_eti1': B_PFGP.ec:10216: warning: comparison between pointer and integer cc: -l4gl: linker input file unused since linking not done cc: -lnforms: linker input file unused since linking not done cc: -lfesql: linker input file unused since linking not done cc: -los: linker input file unused since linking not done cc: -lasf: linker input file unused since linking not done cc: /opt/informix/lib/tools/libasf.a: linker input file unused since linking not done cc: -los: linker input file unused since linking not done cc: -lasf: linker input file unused since linking not done cc: -lgen: linker input file unused since linking not done cc: -lcrypt: linker input file unused since linking not done cc: -lm: linker input file unused since linking not done cc: /opt/informix/lib/tools/libgls.a: linker input file unused since linking not done cc: /opt/informix/lib/tools/libglx.a: linker input file unused since linking not done