This is an incomplete list of things you could work on if you want to help develop GCC:
Remember to keep other developers informed of any substantial projects you intend to work on.
$(libsubdir)be owned by root rather than the user who did the build.
i686-pc-linux-gnu-gcc-3.4.1. Any program embedding architecture or version dependencies may need such links.
--enable-cc-linksor similar which causes links to the compiler driver or shell scripts to be installed under names
cc(the traditional Unix compiler name and a legacy utility in Unix98, accepting an unspecified C language variant),
c89(POSIX; a script running
gcc -std=c89 -pedantic) and
c99(the Austin Group revision of POSIX; a script running
gcc -std=c99 -pedantic) for systems such as GNU/Linux where GCC is the system compiler.
Right now, describing the target machine's instructions is done cleanly, but describing its addressing mode is done with several ad-hoc macro definitions. Porting would be much easier if there were an RTL description for addressing modes like that for instructions. Tools analogous to genflags and genrecog would generate macros from this description.
There would be one pattern in the address-description file for each kind of addressing, and this pattern would have:
Some new compiler features may be needed to do a good job on machines where static data needs to be addressed using base registers.
Some machines have two stacks in different areas of memory, one used for scalars and another for large objects. The compiler does not now have a way to understand this.
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