warning: type of ' METHODS_SENTINEL' does not match original declaration

[rtsisyk]

Tarantool version:

tarantool-2.4.2.68

OS version:

Fedora 33 Workstation Edition Prerelease

gcc --version
gcc (GCC) 10.2.1 20200804 (Red Hat 10.2.1-2)

Bug description:

Please fix noisy warnings.

/home/roman/Documents/Source/fedora-tarantool.git/tarantool-2.4.2.68/src/lib/core/reflection.h:124:33: warning: type of '
METHODS_SENTINEL' does not match original declaration [-Wlto-type-mismatch]                                              
  124 | extern const struct method_info METHODS_SENTINEL;                                                                
      |                                 ^                                                                                /home/roman/Documents/Source/fedora-tarantool.git/tarantool-2.4.2.68/src/lib/core/reflection.c:35:26: note: 'METHODS_SENT
INEL' was previously declared here                                                                                       
   35 | const struct method_info METHODS_SENTINEL = {                                                                    
      |      

warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
  230 |  ldata[chunk] |= (1UL << offset);
      |               ^

/home/roman/Documents/Source/fedora-tarantool.git/tarantool-2.4.2.68/src/box/sql/select.c: In function 'sqlSelectNew':
/home/roman/Documents/Source/fedora-tarantool.git/tarantool-2.4.2.68/src/box/sql/select.c:207:9: warning: function may return address of local variable [-Wreturn-local-addr]
  207 |  return pNew;
      |         ^
/home/roman/Documents/Source/fedora-tarantool.git/tarantool-2.4.2.68/src/box/sql/select.c:158:9: note: declared here
  158 |  Select standin;
      |         ^

[Totktonada]

Related to #3742.

tarantool/cmake/lto.cmake

Lines 107 to 108 in 0018398

	# FIXME: gh-3742: investigate LTO warnings.
	list(APPEND LDFLAGS_LTO -Wno-lto-type-mismatch)

It seems -flto is added directly instead of cmake <...> -DENABLE_LTO=ON.