I posted a thread about errors I had installing OCI8 libraries on Solaris 10 Sparc machine. I don''t have root access. I finally managed to fix that error by editing rbconfig.rb file and correctin ''cc'' path there. It had gcc path in there. I installed Sun Studio 12.1 and replaced that path. So, at-least that error was fixed. Now I have this error and I kind of know how to fix it but I don''t know which file to edit. ****ERROR MESSAGE************** bash-3.00$ cd ruby-oci8-1.0.6 bash-3.00$ ls ChangeLog doc Makefile pre- distclean.rb ruby-oci8.spec test config.save ext metaconfig README setup.rb th-instant-client dist-files lib NEWS ruby- oci8.gemspec support VERSION bash-3.00$ make ruby setup.rb setup ---> lib ---> lib/dbd <--- lib/dbd <--- lib ---> ext ---> ext/oci8 /usr/ccs/bin/make setup.rb:476: warning: Insecure world writable dir /opt/coolstack/lib/ ruby in PATH, mode 040777 /usr/bin/cc -I. -I. -I/opt/coolstack/lib/ruby/1.8/sparc-solaris2.10 -I/ export/home/roradmin1/ruby-oci8-1.0.6/ext/oci8 -DRUBY_EXTCONF_H\"extconf.h\" -fPIC -O3 -fPIC -I/opt/coolstack/include -I/export/home/ roradmin1/oracle/instantclient_11_1/sdk/include -c oranumber.c "/export/home/roradmin1/oracle/instantclient_11_1/sdk/include/math.h", line 47: cannot find include file: <stdcomp.h> "/export/home/roradmin1/oracle/instantclient_11_1/sdk/include/math.h", line 58: cannot find include file: <cmath> cc: acomp failed for oranumber.c *** Error code 1 make: Fatal error: Command failed for target `oranumber.o'' Current working directory /export/home/roradmin1/ruby-oci8-1.0.6/ext/ oci8 ''system /usr/ccs/bin/make '' failed Try ''ruby setup.rb --help'' for detailed usage. *** Error code 1 ******************ERROR MESSAGE END*********************** Error is because it can''t find: <cmath.h> etc. I know where they are in my system, but I don''t know where to add that path information. The makefile doesn''t have many options. What file do I need to edit to add path information of .h files?