Cannot build on AArch64

[kmeaw]

[[email protected]:[PL]:/mnt/storage/home/kmeaw/psyscall]$ make
cc -g -Wall -std=c89 -pedantic -c -o psyscall.o psyscall.c
psyscall.c:21:43: error: dereferencing pointer to incomplete type ‘struct user’
 #define PT_REGS (sizeof(((struct user *)0)->regs)/sizeof(unsigned long))
                                           ^
psyscall.c:29:12: note: in expansion of macro ‘PT_REGS’
     } regs[PT_REGS];
            ^~~~~~~
psyscall.c: In function ‘init_arch’:
psyscall.c:81:16: error: ‘PTRACE_GETREGS’ undeclared (first use in this function); did you mean ‘PTRACE_GETREGSET’?
     if (ptrace(PTRACE_GETREGS, child, NULL, &regs0) == -1) {
                ^~~~~~~~~~~~~~
                PTRACE_GETREGSET
psyscall.c:81:16: note: each undeclared identifier is reported only once for each function it appears in
psyscall.c:96:20: error: ‘PTRACE_SETREGS’ undeclared (first use in this function); did you mean ‘PTRACE_GETREGS’?
             ptrace(PTRACE_SETREGS, child, NULL, regs);
                    ^~~~~~~~~~~~~~
                    PTRACE_GETREGS
psyscall.c:58:42: warning: unused variable ‘regs’ [-Wunused-variable]
     long regs0[PT_REGS], regs1[PT_REGS], regs[PT_REGS];
                                          ^~~~
psyscall.c:58:26: warning: unused variable ‘regs1’ [-Wunused-variable]
     long regs0[PT_REGS], regs1[PT_REGS], regs[PT_REGS];
                          ^~~~~
psyscall.c:58:10: warning: unused variable ‘regs0’ [-Wunused-variable]
     long regs0[PT_REGS], regs1[PT_REGS], regs[PT_REGS];
          ^~~~~
psyscall.c: In function ‘psyscall’:
psyscall.c:343:12: error: ‘PTRACE_GETREGS’ undeclared (first use in this function); did you mean ‘PTRACE_GETREGSET’?
     ptrace(PTRACE_GETREGS, child, NULL, &regs);
            ^~~~~~~~~~~~~~
            PTRACE_GETREGSET
psyscall.c:375:12: error: ‘PTRACE_SETREGS’ undeclared (first use in this function); did you mean ‘PTRACE_GETREGS’?
     ptrace(PTRACE_SETREGS, pid, NULL, &regs);
            ^~~~~~~~~~~~~~
            PTRACE_GETREGS
psyscall.c:267:34: warning: unused variable ‘saved’ [-Wunused-variable]
     long argv[6], regs[PT_REGS], saved[PT_REGS], ret;
                                  ^~~~~
psyscall.c:267:19: warning: unused variable ‘regs’ [-Wunused-variable]
     long argv[6], regs[PT_REGS], saved[PT_REGS], ret;
                   ^~~~
Makefile:10: recipe for target 'psyscall.o' failed
make: *** [psyscall.o] Error 1
[[email protected]:[PL]:/mnt/storage/home/kmeaw/psyscall]$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/aarch64-linux-gnu/7/lto-wrapper
Target: aarch64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro 7.5.0-3ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs --enable-languages=c,ada,c++,go,d,fortran,objc,obj-c++ --prefix=/usr --with-gcc-major-version-only --program-suffix=-7 --program-prefix=aarch64-linux-gnu- --enable-shared --enable-linker-build-id --libexecdir=/usr/lib --without-included-gettext --enable-threads=posix --libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes --with-default-libstdcxx-abi=new --enable-gnu-unique-object --disable-libquadmath --disable-libquadmath-support --enable-plugin --enable-default-pie --with-system-zlib --enable-multiarch --enable-fix-cortex-a53-843419 --disable-werror --enable-checking=release --build=aarch64-linux-gnu --host=aarch64-linux-gnu --target=aarch64-linux-gnu
Thread model: posix
gcc version 7.5.0 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04) 
[[email protected]:[PL]:/mnt/storage/home/kmeaw/psyscall]$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 18.04.5 LTS
Release:        18.04
Codename:       bionic