Description:
------------
With gcc 8.2.1 -flto build fails:

/usr/local/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../x86_64-pc-linux-gnu/bin/ld: /src/mail/imap-2007f//lib/libc-client.a(osdep.o): in function `ssl_onceonlyinit':
/src/mail/imap-2007f/c-client/osdep.c:302: warning: the use of `tmpnam' is dangerous, better use `mkstemp'
/src/http/php-7.1.26/Zend/zend_vm_execute.h: In function 'ZEND_IS_SMALLER_OR_EQUAL_DOUBLE_SPEC_TMPVARCV_TMPVARCV_HANDLER':
/src/http/php-7.1.26/Zend/zend_vm_execute.h:326:38: error: global register variable follows a function definition
 register zend_execute_data* volatile execute_data __asm__(ZEND_VM_FP_GLOBAL_REG);
                                      ^
/src/http/php-7.1.26/Zend/zend_vm_execute.h:332:34: error: global register variable follows a function definition
 register const zend_op* volatile opline __asm__(ZEND_VM_IP_GLOBAL_REG);
                                  ^
/src/http/php-7.1.26/ext/readline/readline_cli.c: In function 'cli_completion_generator_ht.constprop':
/src/http/php-7.1.26/ext/readline/readline_cli.c:408:15: warning: 'name' may be used uninitialized in this function [-Wmaybe-uninitialized]
  zend_string *name;
               ^
/src/http/php-7.1.26/sapi/cli/php_cli_server.c: In function 'php_cli_server_client_read_request_on_path':
/src/http/php-7.1.26/sapi/cli/php_cli_server.c:1571:29: warning: 'vpath_len' may be used uninitialized in this function [-Wmaybe-uninitialized]
   client->request.vpath_len = vpath_len;
                             ^
/src/http/php-7.1.26/sapi/cli/php_cli_server.c:1568:10: note: 'vpath_len' was declared here
   size_t vpath_len;
          ^
/src/http/php-7.1.26/Zend/zend_execute.c: In function 'zend_check_arg_type':
/src/http/php-7.1.26/Zend/zend_execute.c:959:3: warning: 'ce' may be used uninitialized in this function [-Wmaybe-uninitialized]
   zend_verify_arg_error(zf, cur_arg_info, arg_num, ce, arg);
   ^
/src/http/php-7.1.26/Zend/zend_execute.c:948:20: note: 'ce' was declared here
  zend_class_entry *ce;
                    ^
lto-wrapper: fatal error: cc returned 1 exit status
compilation terminated.
/usr/local/lib/gcc/x86_64-pc-linux-gnu/8.2.1/../../../../x86_64-pc-linux-gnu/bin/ld: error: lto-wrapper failed
collect2: error: ld returned 1 exit status
make: *** [Makefile:300: sapi/cli/php] Error 1