I am currently using MSYS_NT-10.0-22621 Legion 3.4.7.x86_64 2023-07-14 16:57 UTC x86_64 Msys and using mingw64
My mingw64 version is
g++.exe (Rev7, Built by MSYS2 project) 13.1.0
Copyright (C) 2023 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
I wrote a simple main.cpp file which contained.
#include <iostream>
int main()
{
std::cout<<"Hello world"<<std::endl;
}
However, while building it, even though it creates a .exe file, it doesn't output anything.
So, I install a previous version, using Mingw Natively. And my version was
g++.exe (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders) 12.3.0
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
For Comparison, I compiled the same file into assembly.
12.3.0
.file "main.cpp"
.text
.lcomm _ZStL8__ioinit,1,1
.def __main; .scl 2; .type 32; .endef
.section .rdata,"dr"
.LC0:
.ascii "Hello world\0"
.text
.globl main
.def main; .scl 2; .type 32; .endef
.seh_proc main
main:
.LFB1991:
pushq %rbp
.seh_pushreg %rbp
movq %rsp, %rbp
.seh_setframe %rbp, 0
subq $32, %rsp
.seh_stackalloc 32
.seh_endprologue
call __main
leaq .LC0(%rip), %rax
movq %rax, %rdx
movq .refptr._ZSt4cout(%rip), %rax
movq %rax, %rcx
call _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc
movq %rax, %rcx
movq .refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(%rip), %rax
movq %rax, %rdx
call _ZNSolsEPFRSoS_E
movl $0, %eax
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.def __tcf_0; .scl 3; .type 32; .endef
.seh_proc __tcf_0
__tcf_0:
.LFB2524:
pushq %rbp
.seh_pushreg %rbp
movq %rsp, %rbp
.seh_setframe %rbp, 0
subq $32, %rsp
.seh_stackalloc 32
.seh_endprologue
leaq _ZStL8__ioinit(%rip), %rax
movq %rax, %rcx
call _ZNSt8ios_base4InitD1Ev
nop
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.def _Z41__static_initialization_and_destruction_0ii; .scl 3; .type 32; .endef
.seh_proc _Z41__static_initialization_and_destruction_0ii
_Z41__static_initialization_and_destruction_0ii:
.LFB2523:
pushq %rbp
.seh_pushreg %rbp
movq %rsp, %rbp
.seh_setframe %rbp, 0
subq $32, %rsp
.seh_stackalloc 32
.seh_endprologue
movl %ecx, 16(%rbp)
movl %edx, 24(%rbp)
cmpl $1, 16(%rbp)
jne .L6
cmpl $65535, 24(%rbp)
jne .L6
leaq _ZStL8__ioinit(%rip), %rax
movq %rax, %rcx
call _ZNSt8ios_base4InitC1Ev
leaq __tcf_0(%rip), %rax
movq %rax, %rcx
call atexit
.L6:
nop
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.def _GLOBAL__sub_I_main; .scl 3; .type 32; .endef
.seh_proc _GLOBAL__sub_I_main
_GLOBAL__sub_I_main:
.LFB2525:
pushq %rbp
.seh_pushreg %rbp
movq %rsp, %rbp
.seh_setframe %rbp, 0
subq $32, %rsp
.seh_stackalloc 32
.seh_endprologue
movl $65535, %edx
movl $1, %ecx
call _Z41__static_initialization_and_destruction_0ii
nop
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.section .ctors,"w"
.align 8
.quad _GLOBAL__sub_I_main
.ident "GCC: (MinGW-W64 x86_64-ucrt-posix-seh, built by Brecht Sanders) 12.3.0"
.def _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc; .scl 2; .type 32; .endef
.def _ZNSolsEPFRSoS_E; .scl 2; .type 32; .endef
.def _ZNSt8ios_base4InitD1Ev; .scl 2; .type 32; .endef
.def _ZNSt8ios_base4InitC1Ev; .scl 2; .type 32; .endef
.def atexit; .scl 2; .type 32; .endef
.section .rdata$.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_, "dr"
.globl .refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
.linkonce discard
.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_:
.quad _ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
.section .rdata$.refptr._ZSt4cout, "dr"
.globl .refptr._ZSt4cout
.linkonce discard
.refptr._ZSt4cout:
.quad _ZSt4cout
And the 13.1 outputs
.file "main.cpp"
.text
.def __main; .scl 2; .type 32; .endef
.section .rdata,"dr"
.LC0:
.ascii "Hello world\0"
.text
.globl main
.def main; .scl 2; .type 32; .endef
.seh_proc main
main:
.LFB2073:
pushq %rbp
.seh_pushreg %rbp
movq %rsp, %rbp
.seh_setframe %rbp, 0
subq $32, %rsp
.seh_stackalloc 32
.seh_endprologue
call __main
leaq .LC0(%rip), %rax
movq %rax, %rdx
movq .refptr._ZSt4cout(%rip), %rax
movq %rax, %rcx
call _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc
movq %rax, %rcx
movq .refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_(%rip), %rax
movq %rax, %rdx
call _ZNSolsEPFRSoS_E
movl $0, %eax
addq $32, %rsp
popq %rbp
ret
.seh_endproc
.section .rdata,"dr"
_ZNSt8__detail30__integer_to_chars_is_unsignedIjEE:
.byte 1
_ZNSt8__detail30__integer_to_chars_is_unsignedImEE:
.byte 1
_ZNSt8__detail30__integer_to_chars_is_unsignedIyEE:
.byte 1
.ident "GCC: (Rev7, Built by MSYS2 project) 13.1.0"
.def _ZStlsISt11char_traitsIcEERSt13basic_ostreamIcT_ES5_PKc; .scl 2; .type 32; .endef
.def _ZNSolsEPFRSoS_E; .scl 2; .type 32; .endef
.section .rdata$.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_, "dr"
.globl .refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
.linkonce discard
.refptr._ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_:
.quad _ZSt4endlIcSt11char_traitsIcEERSt13basic_ostreamIT_T0_ES6_
.section .rdata$.refptr._ZSt4cout, "dr"
.globl .refptr._ZSt4cout
.linkonce discard
.refptr._ZSt4cout:
.quad _ZSt4cout
My command was same for the both version, (without any optimisation option)
g++ .\main.cpp -S
for executable
g++ .\main.cpp -o .\main.exe
Using pacman -Qq | grep gcc in msys2shell, mingw64shell and ucrt64shell,
I get these packages
gcc-libs
mingw-w64-x86_64-gcc
mingw-w64-x86_64-gcc-ada
mingw-w64-x86_64-gcc-fortran
mingw-w64-x86_64-gcc-libgfortran
mingw-w64-x86_64-gcc-libs
mingw-w64-x86_64-gcc-objc
mingw-w64-x86_64-libgccjit
Same for all the shells
When I ran $ pacman -Qi gcc-libs in the shell it returned:
Name : gcc-libs
Version : 11.3.0-4
Description : Runtime libraries shipped by GCC
Architecture : x86_64
URL : https://gcc.gnu.org/
Licenses : GPL LGPL FDL custom
Groups : None
Provides : None
Depends On : None
Optional Deps : None
Required By : brotli bsdtar file inetutils libasprintf libassuan libbz2 libdb libexpat libgdbm
libgettextpo libgnutls libiconv libintl libksba liblz4 libnghttp2 libnpth libpcre libpcre2_8
libutil-linux libzstd ncurses wget zlib zstd
Optional For : None
Conflicts With : None
Replaces : None
Installed Size : 5.30 MiB
Packager : CI (msys2/msys2-autobuild/79096b75/5113523851)
Build Date : Mon, May 29, 2023 10:03:27 PM
Install Date : Tue, Jul 18, 2023 9:15:05 AM
Install Reason : Installed as a dependency for another package
Install Script : No
Validated By : Signature
Also, for more information, I'm adding this:
$ pacman -Qi | grep gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs libbz2 libiconv libexpat liblzma liblz4 libopenssl libzstd zlib
Depends On : gcc-libs zlib libbz2 liblzma libzstd
Name : gcc-libs
Depends On : gcc-libs libintl libreadline ncurses
Depends On : gcc-libs
Depends On : gcc-libs libgpg-error
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs libreadline libiconv libintl ncurses
Depends On : gcc-libs
Depends On : gcc-libs libidn2 libiconv libintl gmp libnettle libp11-kit libtasn1 zlib
Depends On : gcc-libs libintl
Depends On : gcc-libs libiconv
Depends On : gcc-libs libgpg-error
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs libintl
Depends On : gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-binutils mingw-w64-x86_64-crt mingw-w64-x86_64-headers mingw-w64-x86_64-isl mingw-w64-x86_64-libiconv mingw-w64-x86_64-gmp mingw-w64-x86_64-mpfr mingw-w64-x86_64-mpc mingw-w64-x86_64-gcc-libs=13.1.0-7 mingw-w64-x86_64-windows-default-manifest mingw-w64-x86_64-winpthreads mingw-w64-x86_64-zlib mingw-w64-x86_64-zstd
Depends On : mingw-w64-x86_64-gcc-libs=13.1.0-7
Name : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-mpc mingw-w64-x86_64-mpfr mingw-w64-x86_64-ncurses mingw-w64-x86_64-python mingw-w64-x86_64-readline mingw-w64-x86_64-xxhash mingw-w64-x86_64-zlib mingw-w64-x86_64-zstd
Depends On : mingw-w64-x86_64-expat mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-libiconv
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-gettext
Required By : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-winpthreads-git
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-gmp
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-expat mingw-w64-x86_64-bzip2 mingw-w64-x86_64-libffi mingw-w64-x86_64-mpdecimal mingw-w64-x86_64-ncurses mingw-w64-x86_64-openssl mingw-w64-x86_64-sqlite3 mingw-w64-x86_64-tcl mingw-w64-x86_64-tk mingw-w64-x86_64-zlib mingw-w64-x86_64-xz mingw-w64-x86_64-tzdata
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-termcap
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-readline mingw-w64-x86_64-tcl mingw-w64-x86_64-zlib
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-zlib
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : gcc-libs
Depends On : gcc-libs libiconv libidn2 libintl libgpgme libpcre2_8 libpsl libuuid libgnutls zlib
Depends On : gcc-libs
Depends On : gcc-libs libzstd
nurpr@Legion MSYS ~
$ pacman -Qi | grep mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-binutils mingw-w64-x86_64-crt mingw-w64-x86_64-headers mingw-w64-x86_64-isl mingw-w64-x86_64-libiconv mingw-w64-x86_64-gmp mingw-w64-x86_64-mpfr mingw-w64-x86_64-mpc mingw-w64-x86_64-gcc-libs=13.1.0-7 mingw-w64-x86_64-windows-default-manifest mingw-w64-x86_64-winpthreads mingw-w64-x86_64-zlib mingw-w64-x86_64-zstd
Depends On : mingw-w64-x86_64-gcc-libs=13.1.0-7
Name : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-mpc mingw-w64-x86_64-mpfr mingw-w64-x86_64-ncurses mingw-w64-x86_64-python mingw-w64-x86_64-readline mingw-w64-x86_64-xxhash mingw-w64-x86_64-zlib mingw-w64-x86_64-zstd
Depends On : mingw-w64-x86_64-expat mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-libiconv
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-gettext
Required By : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-winpthreads-git
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-gmp
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-expat mingw-w64-x86_64-bzip2 mingw-w64-x86_64-libffi mingw-w64-x86_64-mpdecimal mingw-w64-x86_64-ncurses mingw-w64-x86_64-openssl mingw-w64-x86_64-sqlite3 mingw-w64-x86_64-tcl mingw-w64-x86_64-tk mingw-w64-x86_64-zlib mingw-w64-x86_64-xz mingw-w64-x86_64-tzdata
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-termcap
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-readline mingw-w64-x86_64-tcl mingw-w64-x86_64-zlib
Depends On : mingw-w64-x86_64-gcc-libs mingw-w64-x86_64-zlib
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Depends On : mingw-w64-x86_64-gcc-libs
Running executable generated from 13.1 outputs nothing where, 12.3 executable outputs correctly. It used to work before I updated it. I also used same version of Mingw natively, and it had the same problem.
Is it some sort of bug in g++ 13.1. Why isn't it working?
I had Qt install and apparently that was messing up with my mingw64.
The windows system path in environmental variable also had qt directory before the msys2 itself.
After Uninstalling qt and removing it from system path fixed this issue.