Wrap exports in eval-when.
src/compiler/generic/objdef.lisp:: src/compiler/generic/utils.lisp:; src/compiler/generic/vm-macs.lisp:: src/compiler/sparc/c-callback.lisp:: src/compiler/sparc/parms.lisp:: When export lost its compile-time effects and became a normal function, the exports in many files no longer took affect while compiling the file. This change makes the compile-time effects happen as before in selected files. With this change, the sparc port can be cross-compiled from x86 again. src/tools/cross-scripts/cross-x86-sparc.lisp:: Need to frob CHAR-BYTES, which is needed by BYTE-BASH-COPY. .