How to compile a C++ program with clang from repo?

[Officeyutong]

I have installed clang-10, libclang-common-10-dev, libclang-cpp10, libc++-10-dev and libc++-dev from the Procursus, but when I used clang-10 to compile a C++ program, it gives me the following errors:

YTs-iPad-Pro:~ root# cat test.cpp
#include <iostream>

using namespace std;

int main(){
        cout << "test" << endl;
        return 0;
}
YTs-iPad-Pro:~ root# clang-10 test.cpp
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
/usr/bin/../include/c++/v1/wchar.h:118:15: fatal error: 'wchar.h' file not found
#include_next <wchar.h>
              ^~~~~~~~~
1 error generated.
YTs-iPad-Pro:~ root# 

Does this mean that I have forgot to install some packages(such as a certain type of Standard C Libraries) ? or C++ programs are not supported now?

OS: iPadOS 13.5.1
Jailbreak: Odyssey 1.2
Device: iPad Pro 2020 11-inch
Package manager: Sileo

[Diatrus]

Place an iPhoneOS sdk in /usr/share/SDKs, restart your terminal, and try again.

[CRKatri]

Also make sure build-essential is installed

[Officeyutong]

Place an iPhoneOS sdk in /usr/share/SDKs, restart your terminal, and try again.

I copied the iPhoneOS sdk from the XCode , then another error occured

YTs-iPad-Pro:~ root# clang-10 test.cpp                                           
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
In file included from /var/include/wchar.h:70:
/var/include/sys/cdefs.h:458:4: error: Unknown architecture
#  error Unknown architecture
   ^
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
In file included from /var/include/wchar.h:71:
In file included from /var/include/_types.h:27:
In file included from /var/include/sys/_types.h:33:
/var/include/machine/_types.h:32:2: error: architecture not supported
#error architecture not supported
 ^
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
In file included from /var/include/wchar.h:71:
In file included from /var/include/_types.h:27:
/var/include/sys/_types.h:94:9: error: unknown type name '__int64_t'
typedef __int64_t       __darwin_blkcnt_t;      /* total blocks */
        ^
/var/include/sys/_types.h:95:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_blksize_t;     /* preferred block size */
        ^
note: '__int128_t' declared here
/var/include/sys/_types.h:96:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_dev_t;         /* dev_t */
        ^
note: '__int128_t' declared here
/var/include/sys/_types.h:99:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_gid_t;         /* [???] process and group IDs */
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:100:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_id_t;          /* [XSI] pid_t, uid_t, or gid_t*/
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:101:9: error: unknown type name '__uint64_t'
typedef __uint64_t      __darwin_ino64_t;       /* [???] Used for 64 bit inodes */
        ^
/var/include/sys/_types.h:105:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_ino_t;         /* [???] Used for inodes */
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:107:9: error: unknown type name '__darwin_natural_t'
typedef __darwin_natural_t __darwin_mach_port_name_t; /* Used by mach */
        ^
/var/include/sys/_types.h:109:9: error: unknown type name '__uint16_t'; did you mean '__uint128_t'?
typedef __uint16_t      __darwin_mode_t;        /* [???] Some file attributes */
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:110:9: error: unknown type name '__int64_t'
typedef __int64_t       __darwin_off_t;         /* [???] Used for file sizes */
        ^
/var/include/sys/_types.h:111:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_pid_t;         /* [???] process and group IDs */
        ^
note: '__int128_t' declared here
/var/include/sys/_types.h:131:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_sigset_t;      /* [???] signal set */
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:132:9: error: unknown type name '__int32_t'; did you mean '__int128_t'?
typedef __int32_t       __darwin_suseconds_t;   /* [???] microseconds */
        ^
note: '__int128_t' declared here
/var/include/sys/_types.h:133:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_uid_t;         /* [???] user IDs */
        ^
note: '__uint128_t' declared here
/var/include/sys/_types.h:134:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_useconds_t;    /* [???] microseconds */
        ^
note: '__uint128_t' declared here
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
In file included from /var/include/wchar.h:71:
/var/include/_types.h:32:9: error: unknown type name '__uint32_t'; did you mean '__uint128_t'?
typedef __uint32_t      __darwin_wctype_t;
        ^
note: '__uint128_t' declared here
In file included from test.cpp:1:
In file included from /usr/bin/../include/c++/v1/iostream:37:
In file included from /usr/bin/../include/c++/v1/ios:214:
In file included from /usr/bin/../include/c++/v1/iosfwd:95:
/var/include/wchar.h:79:9: error: unknown type name '__darwin_size_t'
typedef __darwin_size_t         size_t;
        ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.

[Diatrus]

You need c++ headers from the Xcode toolchain, or install libc++-dev

EDIT: I just noticed the error was from /var/include/wchar.h, why is that there? lol

[CRKatri]

Besides the weird stuff that happened with /var that needs to be fixed you should also be running clang++ to compile.
Also make sure odcctools is installed.

[Officeyutong]

You need c++ headers from the Xcode toolchain, or install libc++-dev

EDIT: I just noticed the error was from /var/include/wchar.h, why is that there? lol

I solved my problem by removing /var/include, thanks XD