sel4 build broken in 20.05?

[Alexander Tormasov]

I am trying to compile sel4 demo for x86, and hit an error:
during compilation of  [CC] kernel_final.s
in the process which give
/usr/local/genode/tool/current/bin/genode-x86-gcc  -S -o kernel_final.s kernel_final.c

it generates asm error
 error: impossible constraint in ‘asm’!

Any suggestions?

Log below

 [CC] kernel_final.s
In file included from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/assert.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/types.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/basic_types.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/types.h:14,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/src/api/faults.c:14:
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/util.h:89:7: warning: conflicting types for built-in function ‘memset’ [-Wbuiltin-declaration-mismatch]
 void *memset(void *s, unsigned long c, unsigned long n) VISIBLE;
       ^~~~~~
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/util.h:91:31: warning: conflicting types for built-in function ‘strncmp’ [-Wbuiltin-declaration-mismatch]
 int PURE strncmp(const char *s1, const char *s2, int n);
                               ^~~~~~~
In file included from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/api/types.h:23,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/compound_types.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/types.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/src/api/faults.c:14:
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/machine/io.h:35:6: warning: conflicting types for built-in function ‘putchar’ [-Wbuiltin-declaration-mismatch]
 void putchar(char c);
      ^~~~~~~
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/machine/io.h:38:8: warning: conflicting types for built-in function ‘puts’ [-Wbuiltin-declaration-mismatch]
 word_t puts(const char *s) VISIBLE;
        ^~~~
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/src/machine/io.c:154:1: warning: conflicting types for built-in function ‘isdigit’ [-Wbuiltin-declaration-mismatch]
 isdigit(char c)
 ^~~~~~~
In file included from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/kernel/x2apic.h:17,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/kernel/apic.h:18,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/plat/pc99/plat/machine/interrupt.h:20,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/plat/pc99/plat/machine/hardware.h:14,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/machine.h:18,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/api/syscall.h:15,
                 from /home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/src/api/faults.c:16:
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/machine.h: In function ‘x86_flush_rsb’:
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/machine.h:348:5: warning: asm operand 1 probably doesn’t match constraints
     asm volatile(
     ^~~~~~~
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/include/arch/x86/arch/machine.h:348:5: error: impossible constraint in ‘asm’
/home/tor/gen/20.05-tor/contrib/sel4-7935487f91a31c0cd8aaf09278f6312af56bb935/src/kernel/sel4/Makefile:653: recipe for target 'kernel_final.s' failed
make[4]: *** [kernel_final.s] Error 1