Compilation error

[mcc-devel]

While compiling with your complier, I met the following error:

C:\ptrs>C:\gcc11\gcc\bin\g++ ptrs.cpp
In file included from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\bits\postypes.h:40,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\iosfwd:40,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\ios:38,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\ostream:38,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\iostream:39,
                 from demo:1,
                 from ptrs.cpp:1:
c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\cwchar:44:10: fatal error: wchar.h: No such file or directory 
   44 | #include <wchar.h>
      |          ^~~~~~~~~
compilation terminated.

I used the following files:
demo:

#pragma once
#include <iostream>
#include <string>
using std::cout;
using std::endl;
using std::string;

template <typename T>
class demo {
private:
    T var;
    string name;
    string scope;
    static string ato = "auto_ptr";
    static string uniq = "unique_ptr";
    static string shr = "shared_ptr";
public:
    demo(T val = 0, string n = "NULL", string sc = "main()", string pt = demo::ato) {
        var = val;
        name = n;
        scope = sc;
        cout << "Object " << name << " with value of " << var << " in scope " << scope << " created using " << pt << "." << endl;
    }
    
    ~demo() {
        cout << "Object " << name << " with value of " << var << " in scope " << scope << " destroyed by " << pt << "." << endl;
    }

    void setnm(string nm) {name = nm;}
    void setv(T v) {var = v;}
}

ptrs.cpp:

#include "demo"
#include <iostream>
#include <memory>
using namespace std;

int main() {
    auto_ptr p1 = new demo<unsigned short>(1, "p1");
    unique_ptr p2 = new demo<unsigned short>(2, "p2", , demo<unsigned short>::uniq);
    shared_ptr p3 = new demo<unsigned short>(3, "p3", , demo<unsigned short>::shr);
    auto_ptr p11 = p1;
    p11 -> setnm("p11");
    //unique_ptr p22 = p2;     will cause err at compile time
    //p22 -> setnm("p22");
    shared_ptr p33 = p3;
    p33 -> setnm("p33");
    return 0;
}

[zero9178]

What's the output of g++ -v ptrs.cpp? wchar.h is part of MinGW so it should be in the x86_64-w64-mingw32/include directory

[mcc-devel]

Using built-in specs.
COLLECT_GCC=C:\gcc11\gcc\bin\g++
COLLECT_LTO_WRAPPER=c:/gcc11/gcc/bin/../libexec/gcc/x86_64-w64-mingw32/11/lto-wrapper.exe
Target: x86_64-w64-mingw32
Configured with: ../configure --target=x86_64-w64-mingw32 --host=x86_64-w64-mingw32 --disable-bootstrap --enable-libstdcxx-debug --with-tune=znver1 --prefix=/mnt/c/GCC --with-sysroot=/mnt/c/GCC-Build/NewestLinux --with-build-sysroot=/mnt/c/GCC-Build/NewestLinux --disable-libstdcxx-pch --disable-multilib --enable-libgomp --with-cross-host --with-libiconv-prefix=/mnt/c/GCC-Build/NewestLinux/Libraries --disable-libstdcxx-verbose --enable-languages=c,c++,fortran,lto,objc,obj-c++ --disable-nls --disable-win32-registry --enable-shared --with-gnu-as --with-gnu-ld --enable-threads=posix --program-suffix=-11 --enable-version-specific-runtime-libs --with-gcc-major-version-only --enable-__cxa_atexit --enable-plugin --program-prefix=
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.0.0 20201110 (experimental) (GCC)
COLLECT_GCC_OPTIONS='-v' '-shared-libgcc' '-mtune=znver1' '-march=x86-64' '-dumpdir' 'a-'
 c:/gcc11/gcc/bin/../libexec/gcc/x86_64-w64-mingw32/11/cc1plus.exe -quiet -v -iprefix c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/ -D_REENTRANT ptrs.cpp -quiet -dumpdir a- -dumpbase ptrs.cpp -dumpbase-ext .cpp -mtune=znver1 -march=x86-64 -version -o C:\Users\jett\AppData\Local\Temp\ccUipPZT.s
GNU C++17 (GCC) version 11.0.0 20201110 (experimental) (x86_64-w64-mingw32)
        compiled by GNU C version 10.2.1 20200804, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22-GMP

GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
ignoring nonexistent directory "c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/include"
ignoring duplicate directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/include/c++"
ignoring duplicate directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/include/c++/x86_64-w64-mingw32"
ignoring duplicate directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/include/c++/backward"
ignoring duplicate directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/include"
ignoring nonexistent directory "/mnt/c/GCC-Build/NewestLinux/mnt/c/GCC/lib/gcc/x86_64-w64-mingw32/11/../../../../include"
ignoring duplicate directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/include-fixed"
ignoring nonexistent directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/include"
ignoring nonexistent directory "/mnt/c/GCC-Build/NewestLinux/mingw/include"
#include "..." search starts here:
#include <...> search starts here:
 c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/include/c++
 c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/include/c++/x86_64-w64-mingw32
 c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/include/c++/backward
 c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/include
 c:\gcc11\gcc\bin\../lib/gcc/x86_64-w64-mingw32/11/include-fixed
End of search list.
GNU C++17 (GCC) version 11.0.0 20201110 (experimental) (x86_64-w64-mingw32)
        compiled by GNU C version 10.2.1 20200804, GMP version 6.2.0, MPFR version 4.0.2, MPC version 1.1.0, isl version isl-0.22-GMP

GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
Compiler executable checksum: 549845ecba30700c7d4bcb9917032570
In file included from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\bits\postypes.h:40,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\iosfwd:40,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\ios:38,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\ostream:38,
                 from c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\iostream:39,
                 from demo:2,
                 from ptrs.cpp:1:
c:\gcc11\gcc\lib\gcc\x86_64-w64-mingw32\11\include\c++\cwchar:44:10: fatal error: wchar.h: No such file or directory
   44 | #include <wchar.h>
      |          ^~~~~~~~~
compilation terminated.

[zero9178]

ignoring nonexistent directory "c:/gcc11/gcc/lib/gcc/../../lib/gcc/x86_64-w64-mingw32/11/../../../../x86_64-w64-mingw32/include"
Could it be that for some reason the directory C:\gcc11\gcc\x86_64-w64-mingw32\include does not exist on your machine?

[mcc-devel]

Ah, yes, sorry about that.