[Bug c++/100847] New: M1 chip: many functions not declared in "std" or "::"

[Bug c++/100847] New: M1 chip: many functions not declared in "std" or "::"

[zihanwu7-c at my dot cityu.edu.hk]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100847

            Bug ID: 100847
           Summary: M1 chip: many functions not declared in "std" or "::"
           Product: gcc
           Version: 11.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zihanwu7-c at my dot cityu.edu.hk
  Target Milestone: ---

Created attachment 50900
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=50900&action=edit
terminal output

I use Apple M1 chip to run gcc.

The gcc is installed via home-brew(arm).

It can't compile even the "Hello World" cpp file.

Attachment is the result from:

g++-11 main.cpp -Wall -Wextra

g++-11 -v

and

g++-11 main.cpp -Wall -Wextra -nostdinc++

main.cpp includes <iostream> and uses namespace std.

[Bug c++/100847] M1 chip: many functions not declared in "std" or "::"

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100847

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Target|                            |aarch64-darwin

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
sounds like an install issue to me - you're picking up Xcode libc++ headers

[Bug c++/100847] M1 chip: many functions not declared in "std" or "::"

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=100847

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|---                         |WORKSFORME

--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I was able to compile and test GCC myself with the following options:

apinski@Andrews-Mac-mini ~ % ~/upstream-gcc/bin/gcc -v
Using built-in specs.
COLLECT_GCC=/Users/apinski/upstream-gcc/bin/gcc
COLLECT_LTO_WRAPPER=/Users/apinski/upstream-gcc/libexec/gcc/aarch64-apple-darwin20.4.0/11.0.1/lto-wrapper
Target: aarch64-apple-darwin20.4.0
Configured with: /Users/apinski/src/upstream-gcc-macosx/gcc/configure
--prefix=/Users/apinski/upstream-gcc
--with-sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX.sdk/
Thread model: posix
Supported LTO compression algorithms: zlib
gcc version 11.0.1 20210417 (experimental) (GCC)
apinski@Andrews-Mac-mini ~ % ~/upstream-gcc/bin/g++ t.c
apinski@Andrews-Mac-mini ~ % ./a.out
Hello World.
apinski@Andrews-Mac-mini ~ % cat t.c
#include <iostream>

int main(void)
{
  std::cout << "Hello World.\n";
}