* errno.h [!__error_t_defined] (error_t): New type. * sysdeps/mach/hurd/errnos.awk: #define __error_t_defined after the typedef in errnos.h. * string/envz.c, string/envz.h: New files. * string/argz.h, string/argz-append.c, string/argz-count.c, string/argz-create.c, string/argz-delete.c, string/argz-extract.c, string/argz-insert.c, string/argz-stringify.c: New files. * string/Makefile (routines): Add envz, argz-*. (headers): Add argz.h, envz.h.
* config.h.in [HAVE_ELF || HAVE_GNU_LD]: Define HAVE_WEAK_SYMBOLS. * stdlib/strtod.c (PASTE, PASTE1): New helper macros; use these in access to float.h macros. * misc/efgcvt.c: New file. * misc/Makefile (routines): Add efgcvt.