* cp-decl.c (flag_conserve_space): New language specific flag to
tell the compiler to use .common when possible. Reduces the size of
.o files.
* cp-decl.c (duplicate_decls): Copy DECL_COMMON from the olddecl.
* cp-decl.c (start_decl): Set DECL_COMMON appropriately.
* cp-decl.c (finish_decl): Use flag_conserve_space, instead of
flag_no_common.
* cp-decl2.c (flag_conserve_space, lang_f_options): New flag.
* toplev.c (lang_options): New -fconserve-space flag.
* tree.h (DECL_COMMON): New flag.
* tree.h (tree_decl): New common_flag.
* varasm.c (assemble_variable): Use DECL_COMMON to help determine if
an object can be put in .common.
* c-decl.c (start_decl): Set DECL_COMMON to 1..
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@6244
138bc75d-0d04-0410-961f-
82ee72b054a4