REG_ICASE        1116 lib/common/strings.c             reg_flags |= REG_ICASE;
REG_ICASE         542 maint/gnulib/lib/exclude.c                        ((options & FNM_CASEFOLD) ? REG_ICASE : 0);
REG_ICASE         476 maint/gnulib/lib/regcomp.c   syntax |= (cflags & REG_ICASE) ? RE_ICASE : 0;