g98 & Red Hat 6.1

 I've tryed to install g98 on linux Red Hat 6.1 but I got stuck at some
 point during the compilation. I'm using g77 and two libraries: libblas
 and  libf2c. The compilation ends with the following message:
 f77    -O2    -o l117.exe ml117.o  l117.a  util.a  /usr/lib/libblas.a \
 util.a(mdfork.o): In function `mdfork_':
 mdfork.o(.text+0x7): undefined reference to `fork_'
 util.a(mdjoin.o): In function `mdjoin_':
 mdjoin.o(.text+0x1c): undefined reference to `wait_'
 collect2: ld returned 1 exit status
 make: *** [l117.exe] Error 1
 I guess a few people have already compiled successfully g98 on
 linux. Any advice would be welcome.
 Fabrice Leclerc.