In file included from csh.c:43:
/data/data/com.termux/files/usr/include/bsd/vis.h:107:2: warning: "NetBSD added incompatible strnvis() and strnunvis(), please see <bsd/vis.h> for more detils." [-W#warnings]
#warning "NetBSD added incompatible strnvis() and strnunvis(), please see <bsd/vis.h> for more detils."
 ^
In file included from csh.c:46:
./error.h:4:1: error: unknown type name 'error'
error.c:#define ERR_FLAGS       0xf0000000
^
./error.h:4:6: error: expected identifier or '('
error.c:#define ERR_FLAGS       0xf0000000
     ^
csh.c:187:26: error: use of undeclared identifier '_PATH_CSHELL'
    STR_SHELLPATH = SAVE(_PATH_CSHELL);
                         ^
csh.c:226:9: warning: implicit declaration of function 'time' is invalid in C99 [-Wimplicit-function-declaration]
        (void) time(&chktim);
               ^
csh.c:228:9: warning: implicit declaration of function 'pledge' is invalid in C99 [-Wimplicit-function-declaration]
    if (pledge("stdio rpath wpath cpath fattr getpw proc exec tty",
        ^
csh.c:255:20: warning: implicit declaration of function 'funopen' is invalid in C99 [-Wimplicit-function-declaration]
    if (!(cshin  = funopen((void *) &SHIN,  readf, writef, seekf, closef)))
                   ^
csh.c:255:18: warning: incompatible integer to pointer conversion assigning to 'FILE *' (aka 'struct __sFILE *') from 'int' [-Wint-conversion]
    if (!(cshin  = funopen((void *) &SHIN,  readf, writef, seekf, closef)))
                 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
csh.c:257:18: warning: incompatible integer to pointer conversion assigning to 'FILE *' (aka 'struct __sFILE *') from 'int' [-Wint-conversion]
    if (!(cshout = funopen((void *) &SHOUT, readf, writef, seekf, closef)))
                 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
csh.c:259:18: warning: incompatible integer to pointer conversion assigning to 'FILE *' (aka 'struct __sFILE *') from 'int' [-Wint-conversion]
    if (!(csherr = funopen((void *) &SHERR, readf, writef, seekf, closef)))
                 ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
csh.c:423:15: error: use of undeclared identifier 'ERR_SYSTEM'
            stderror(ERR_SYSTEM, tempv[0], strerror(errno));
                     ^
csh.c:443:12: error: use of undeclared identifier 'ERR_SYSTEM'
                stderror(ERR_SYSTEM, tempv[0], strerror(errno));
                         ^
csh.c:457:15: error: use of undeclared identifier 'ERR_SYSTEM'
            stderror(ERR_SYSTEM, "csh", strerror(errno));
                     ^
csh.c:816:11: error: use of undeclared identifier 'ERR_SILENT'
        stderror(ERR_SILENT);
                 ^
csh.c:975:15: error: use of undeclared identifier 'ERR_NAME'
            stderror(ERR_NAME | ERR_INTR);
                     ^
csh.c:975:26: error: use of undeclared identifier 'ERR_INTR'
            stderror(ERR_NAME | ERR_INTR);
                                ^
csh.c:1001:14: error: use of undeclared identifier 'ERR_SILENT'
    stderror(ERR_SILENT);
             ^
csh.c:1121:15: error: use of undeclared identifier 'ERR_OLD'
            stderror(ERR_OLD);
                     ^
csh.c:1137:15: error: use of undeclared identifier 'ERR_OLD'
            stderror(ERR_OLD);
                     ^
csh.c:1163:15: error: use of undeclared identifier 'ERR_NAME'
            stderror(ERR_NAME | ERR_HFLAG);
                     ^
csh.c:1163:26: error: use of undeclared identifier 'ERR_HFLAG'
            stderror(ERR_NAME | ERR_HFLAG);
                                ^
csh.c:1171:11: error: use of undeclared identifier 'ERR_SYSTEM'
        stderror(ERR_SYSTEM, sbuf, strerror(errno));
                 ^
csh.c:1196:12: warning: implicit declaration of function 'time' is invalid in C99 [-Wimplicit-function-declaration]
    (void) time(&t);
           ^
8 warnings and 15 errors generated.