GMake-Files

For security reasons a server offering webservices should be installed new: It is used to run CGI-Webapplications manipulating data in an Oracle 8.1.8. database via webformulas. I first installed Solaris and then Oracle 8.1.8 and the webserver. Both are running without errors. In the next step I used the compiled Files from the backup copy: The webservices are running. To modify the applications a new compilation is necessary. I dir not panipulate *.c files. I just tried to compile it. CC or GCC did not work. I got the information, that make-files are used so I tried gmake with the following mistake. How can I make it run? servernumberone[62]% gmake unregister.c gcc -xO2 -Xa -xstrconst -xF -mr -xarch=v8 -xcache=16/32/1:1024/64/1 -xchip=ultra -D_REENTRANT -K PIC -DPRECOMP -I/oracle/u1/app/oracle/product/8.1.7/precomp/hdrs -I/oracle/u1/app/oracle/product/8.1.7/precomp/public -I/oracle/u1/app/oracle/product/8.1.7/precomp/include -I/oracle/u1/app/oracle/product/8.1.7/oracore/include -I/oracle/u1/app/oracle/product/8.1.7/oracore/public -I/oracle/u1/app/oracle/product/8.1.7/oracore/port/include -I/oracle/u1/app/oracle/product/8.1.7/nlsrtl/include -I/oracle/u1/app/oracle/product/8.1.7/slax/include -I. -DSLMXMX_ENABLE -DSLTS_ENABLE -D_SVID_GETTOD -c -o unregister.o unregister.c gcc: cannot specify -o with -c or -S and multiple compilations gmake: *** [anmeldung.o] Error 1 servernumberone[63]%