Force -march=i686 (just like innodb used to do for years).

And disable query_response_time plugin, it fails to compile with

/mnt/server/plugin/query_response_time/query_response_time.cc:279: error: unable to find a register to spill in class ‘GENERAL_REGS’
/mnt/server/plugin/query_response_time/query_response_time.cc:279: error: this is the insn:
(insn:HI 70 69 71 9 /mnt/server/include/my_atomic.h:194 (parallel [
            (set (reg:DI 82)
                (mem/v:DI (plus:SI (reg/f:SI 79)
                        (reg:SI 78)) [-1 S8 A32]))
            (set (mem/v:DI (plus:SI (reg/f:SI 79)
                        (reg:SI 78)) [-1 S8 A32])
                (unspec_volatile:DI [
                        (mem/v:DI (plus:SI (reg/f:SI 79)
                                (reg:SI 78)) [-1 S8 A32])
                        (reg:DI 82)
                        (reg:SI 83)
                        (reg:SI 84)
                    ] 10))
            (set (reg:CCZ 17 flags)
                (compare:CCZ (unspec_volatile:DI [
                            (mem/v:DI (plus:SI (reg/f:SI 79)
                                    (reg:SI 78)) [-1 S8 A32])
                            (reg:DI 82)
                            (reg:SI 83)
                            (reg:SI 84)
                        ] 11)
                    (reg:DI 82)))
        ]) 1101 {*sync_double_compare_and_swap_ccdi_pic} (insn_list:REG_DEP_TRUE 68 (insn_list:REG_DEP_TRUE 69 (nil)))
    (expr_list:REG_DEAD (reg:SI 84)
        (expr_list:REG_DEAD (reg:SI 83)
            (nil))))