编译问题

[Jay-9527]

gcc -I. -I/home/adiao/LubanCatWrt/staging_dir/host/include -O2 -I/home/adiao/LubanCatWrt/staging_dir/host/include -c -o canonicalize.o canonicalize.c
canonicalize.c: In function 'canonicalize_filename_mode':
canonicalize.c:484:5: warning: #warning "GCC might issue a bogus -Wreturn-local-addr warning here." [-Wcpp]
484 | #warning "GCC might issue a bogus -Wreturn-local-addr warning here."
| ^~~~~~~
canonicalize.c:485:5: warning: #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644." [-Wcpp]
485 | #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644."
| ^~~~~~~

？？？这是什么鬼？都是按步骤来的。

[Jay-9527]

utimens.c: In function 'fdutimens':
utimens.c:383:17: warning: 'update_timespec' accessing 16 bytes in a region of size 8 [-Wstringop-overflow=]
383 | if (ts && update_timespec (&st, &ts))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
utimens.c:383:17: note: referencing argument 2 of type 'struct timespec **'
utimens.c:134:1: note: in a call to function 'update_timespec'
134 | update_timespec (struct stat const *statbuf, struct timespec *ts[2])
| ^~~~~~~~~~~~~~~
utimens.c: In function 'lutimens':
utimens.c:596:17: warning: 'update_timespec' accessing 16 bytes in a region of size 8 [-Wstringop-overflow=]
596 | if (ts && update_timespec (&st, &ts))
| ^~~~~~~~~~~~~~~~~~~~~~~~~~
utimens.c:596:17: note: referencing argument 2 of type 'struct timespec **'
utimens.c:134:1: note: in a call to function 'update_timespec'
134 | update_timespec (struct stat const *statbuf, struct timespec *ts[2])

careadlinkat.c: In function 'careadlinkat':
careadlinkat.c:184:5: warning: #warning "GCC might issue a bogus -Wreturn-local-addr warning here." [-Wcpp]
184 | #warning "GCC might issue a bogus -Wreturn-local-addr warning here."
| ^~~~~~~
careadlinkat.c:185:5: warning: #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644." [-Wcpp]
185 | #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644."
| ^~~~~~~
careadlinkat.c:188:10: warning: function may return address of local variable [-Wreturn-local-addr]
188 | return readlink_stk (fd, filename, buffer, buffer_size, alloc,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
189 | preadlinkat, stack_buf);
| ~~~~~~~~~~~~~~~~~~~~~~~
careadlinkat.c:187:8: note: declared here
187 | char stack_buf[STACK_BUF_SIZE];

gcc -I. -I/home/adiao/LubanCatWrt/staging_dir/host/include -O2 -I/home/adiao/LubanCatWrt/staging_dir/host/include -c -o canonicalize.o canonicalize.c
canonicalize.c: In function 'canonicalize_filename_mode':
canonicalize.c:484:5: warning: #warning "GCC might issue a bogus -Wreturn-local-addr warning here." [-Wcpp]
484 | #warning "GCC might issue a bogus -Wreturn-local-addr warning here."
| ^~~~~~~
canonicalize.c:485:5: warning: #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644." [-Wcpp]
485 | #warning "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93644."
| ^~~~~~~

这是我集合了所有的编译问题。

[Jay-9527]

编译器不是用默认的么？还是说用交叉的方式来编译？