On 14 February 2014 02:50, vkr wrote: > I was building gcc 4.4.3 on Red Hat Enterprise Linux Server release > 6.3 (Santiago). Build has passed, however, fixedincludes directory is > missing some headers which were present in the redhat5.5 installation. Why do you think that's a problem? Only headers that need to be fixed will get fixed. If the headers on rhel5 and rhel6 are different (which of course they are) then a different set of headers will get fixed. > It seems to me that because features.h is picked from the system > header on Redhat6.x, when I compile my project source tree, not from > the fixedincludes, as it is missing anyway, compilation is failing. I don't understand this paragraph. Are you saying your project doesn't compile? Why do you think that is related to fixincludes?