I need to understand how to change the default include search path for gcc when one uses the <> system context for header files. I need to create a gcc install that I can use across multiple different distros of linux and still use the same headers and libs. So I configured gcc with: --prefix=/opt/gcc323 --with-local-path=/opt/gcc323 --with-gnu-as --disable-nls --disable-multilibs --with-sysroot=/opt/RH72 --host=i686-pc-linux-gnu As a test I removed a header file from /usr/include and tried to compile a simple app with the above configured compiler, which failed because the header was missing out of /usr/include, even though the file existed within the system root. So I had assumed using "--with-sysroot" and supplying a set of libs and headers would work. Even if within my make file I specify the correct path for includes, gcc first searches the system includes (tested by placing a bogus header file needed to compile). So, is there a way to change the default behavior of gcc to search a desired include and libs path or am I doing something completely wrong? TIA, Chris