kraj/meta-clang

Compiler installation brokenu, undefined reference to `std::__1::cout'

mariuszmaximus opened this issue · 5 comments

mariuszmaximus commented

I build Toradex image

Toradex 5.7.2 dunfell with meta-clang dunfell-clang12
there were no problems, after install SDK I have clang compiler.

But I have problem link "Hello world"

#include <iostream>
int main(int, char**) {
    std::cout << "Hello, world!\n";
}
aarch64-tdx-linux-clang++ --target=aarch64-tdx-linux --sysroot=/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux -v  main.cpp
main.cpp:(.text+0x14): undefined reference to `std::__1::cout'
.......
clang-12: error: linker command failed with exit code 1 (use -v to see invocation)

log.txt
where to find solution?

kraj commented

@mariuszmaximus can you try

${CLANGCXX} main.cpp

does it fail same way?

mariuszmaximus commented

I try compile my project with nlohmann::json
and have many problems with <valarray> on dunfell-clang12

My first hello world was:

#include <iostream>
#include <valarray>  

int main(int, char**) {
    std::cout << "Hello, world!\n";
}

${CLANGCXX} -O2 -v main.cpp result

clang version 12.0.0 (https://github.com/llvm/llvm-project fa0971b87fb2c9d14d1bba2551e61f02f18f329b)
Target: aarch64-tdx-linux
Thread model: posix
InstalledDir: /opt/tdx-xwayland/5.7.2/sysroots/x86_64-tdxsdk-linux/usr/bin/aarch64-tdx-linux
Found candidate GCC installation: /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0
Selected GCC installation: /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0
Candidate multilib: .;@m64
Selected multilib: .;@m64
 "/opt/tdx-xwayland/5.7.2/sysroots/x86_64-tdxsdk-linux/usr/bin/clang-12" -cc1 -triple aarch64-tdx-linux -emit-obj --mrelax-relocations -disable-free -disable-llvm-verifier -discard-value-names -main-file-name main.cpp -mrelocation-model pic -pic-level 2 -pic-is-pie -mframe-pointer=non-leaf -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu generic -target-feature +neon -target-abi aapcs -fallow-half-arguments-and-returns -fno-split-dwarf-inlining -debugger-tuning=gdb -v -resource-dir /opt/tdx-xwayland/5.7.2/sysroots/x86_64-tdxsdk-linux/usr/lib/clang/12.0.0 -D _FORTIFY_SOURCE=2 -isysroot /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux -internal-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0 -internal-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/aarch64-tdx-linux -internal-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/backward -internal-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/local/include -internal-isystem /opt/tdx-xwayland/5.7.2/sysroots/x86_64-tdxsdk-linux/usr/lib/clang/12.0.0/include -internal-externc-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/include -internal-externc-isystem /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/include -O2 -Wformat -Wformat-security -Werror=format-security -fdeprecated-macro -fdebug-compilation-dir /opt/tdx-xwayland/5.7.2 -ferror-limit 19 -stack-protector 2 -fno-signed-char -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -fcolor-diagnostics -vectorize-loops -vectorize-slp -faddrsig -o /tmp/main-57c2a7.o -x c++ main.cpp
clang -cc1 version 12.0.0 based upon LLVM 12.0.0 default target x86_64-unknown-linux-gnu
ignoring nonexistent directory "/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/local/include"
ignoring nonexistent directory "/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/include"
#include "..." search starts here:
#include <...> search starts here:
 /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0
 /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/aarch64-tdx-linux
 /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/backward
 /opt/tdx-xwayland/5.7.2/sysroots/x86_64-tdxsdk-linux/usr/lib/clang/12.0.0/include
 /opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/include
End of search list.
In file included from main.cpp:2:
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/valarray:1214:5: error: exception specification in declaration does not match previous declaration
    begin(valarray<_Tp>& __va) noexcept
    ^
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/bits/range_access.h:104:31: note: previous declaration is here
  template<typename _Tp> _Tp* begin(valarray<_Tp>&);
                              ^
In file included from main.cpp:2:
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/valarray:1224:5: error: exception specification in declaration does not match previous declaration
    begin(const valarray<_Tp>& __va) noexcept
    ^
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/bits/range_access.h:105:37: note: previous declaration is here
  template<typename _Tp> const _Tp* begin(const valarray<_Tp>&);
                                    ^
In file included from main.cpp:2:
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/valarray:1234:5: error: exception specification in declaration does not match previous declaration
    end(valarray<_Tp>& __va) noexcept
    ^
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/bits/range_access.h:106:31: note: previous declaration is here
  template<typename _Tp> _Tp* end(valarray<_Tp>&);
                              ^
In file included from main.cpp:2:
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/valarray:1249:5: error: exception specification in declaration does not match previous declaration
    end(const valarray<_Tp>& __va) noexcept
    ^
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/lib/aarch64-tdx-linux/9.5.0/../../../include/c++/9.5.0/bits/range_access.h:107:37: note: previous declaration is here
  template<typename _Tp> const _Tp* end(const valarray<_Tp>&);
                                    ^
4 errors generated.

I found on my sysroot two folders with valarray
/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/include/c++/v1/valarray
and
`/opt/tdx-xwayland/5.7.2/sysroots/aarch64-tdx-linux/usr/include/c++/9.5.0/valarray'

I renamed v1 to 9.5.0 then clang compile .o but can't link output

kraj commented

Can you use

${CLANGCXX} -rtlib=compiler-rt --libunwind=libunwind -stdlib=libc++ main.cpp

if it works then you need to set LD to same as above

mariuszmaximus commented

clang-12: error: unsupported option '--libunwind=libunwind'
but
${CLANGCXX} -rtlib=compiler-rt -stdlib=libc++ main.cpp
create a.out
I'll check tommorow on my linux

kraj commented

OK thats fine libuwind perhaps was added later