Host Config (GNU Compiler Collection (GCC) Internals) (original) (raw)

18 Host Configuration ¶

Most details about the machine and system on which the compiler is actually running are detected by the configure script. Some things are impossible for configure to detect; these are described in two ways, either by macros defined in a file namedxm-machine.h or by hook functions in the file specified by the out_host_hook_obj variable in config.gcc. (The intention is that very few hosts will need a header file but nearly every fully supported host will need to override some hooks.)

If you need to define only a few macros, and they have simple definitions, consider using the xm_defines variable in yourconfig.gcc entry instead of creating a host configuration header. See The config.build; config.host; and config.gcc Files.

• Host Common
• Host Filesystem
• Host Misc