How to compile C++ correctly on Mac when it compiles without problems on Linux?

Question

I am working with a C++ project written by others which compiles successfully on Linux. After I cloned it to Mac and do 'make', it gives this error:

clang: error: unknown argument: '-mpreferred-stack-boundary=4'
make: *** [all] Error 1

On my Mac I have g++ installed. I then remove the -mpreferred-stack-boundary=4 option from the Makefile:

$(CC) $(CFLAGS) -mpreferred-stack-boundary=4 -mstackrealign  -o ${NAME}.so $(SEGSRC) $(CFILE) 

These are some definition in the Makefile:

CC                = /usr/bin/g++
CFLAGS    =   -D_ChaiScriptON -g -w -O0 -fPIC -shared -std=c++11

Does the 'c++11' mean I should install c++11 on my Mac? I have g++ installed.

I tried removing the -mpreferred-stack-boundary=4 from the command, then I gives this error:

./CObjectRecognizer/include/commonsFun.h:15:10: fatal error: 'io.h' file not found
#include <io.h>
         ^~~~~~
1 error generated.

Does the 'io.h' come from standard c library?

Answer 1

here is the contents of io.h on linux:

Note: This seems to be a OS specific file for when running on x86-64 hardware.

/* Copyright (C) 1996-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#ifndef _SYS_IO_H
#define _SYS_IO_H   1

#include <features.h>

__BEGIN_DECLS

/* If TURN_ON is TRUE, request for permission to do direct i/o on the
   port numbers in the range [FROM,FROM+NUM-1].  Otherwise, turn I/O
   permission off for that range.  This call requires root privileges.

   Portability note: not all Linux platforms support this call.  Most
   platforms based on the PC I/O architecture probably will, however.
   E.g., Linux/Alpha for Alpha PCs supports this.  */
extern int ioperm (unsigned long int __from, unsigned long int __num,
                   int __turn_on) __THROW;

/* Set the I/O privilege level to LEVEL.  If LEVEL>3, permission to
   access any I/O port is granted.  This call requires root
   privileges. */
extern int iopl (int __level) __THROW;

#if defined __GNUC__ && __GNUC__ >= 2

static __inline unsigned char
inb (unsigned short int __port)
{
  unsigned char _v;

  __asm__ __volatile__ ("inb %w1,%0":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline unsigned char
inb_p (unsigned short int __port)
{
  unsigned char _v;

  __asm__ __volatile__ ("inb %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline unsigned short int
inw (unsigned short int __port)
{
  unsigned short _v;

  __asm__ __volatile__ ("inw %w1,%0":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline unsigned short int
inw_p (unsigned short int __port)
{
  unsigned short int _v;

  __asm__ __volatile__ ("inw %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline unsigned int
inl (unsigned short int __port)
{
  unsigned int _v;

  __asm__ __volatile__ ("inl %w1,%0":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline unsigned int
inl_p (unsigned short int __port)
{
  unsigned int _v;
  __asm__ __volatile__ ("inl %w1,%0\noutb %%al,$0x80":"=a" (_v):"Nd" (__port));
  return _v;
}

static __inline void
outb (unsigned char __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outb %b0,%w1": :"a" (__value), "Nd" (__port));
}

static __inline void
outb_p (unsigned char __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outb %b0,%w1\noutb %%al,$0x80": :"a" (__value),
            "Nd" (__port));
}

static __inline void
outw (unsigned short int __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outw %w0,%w1": :"a" (__value), "Nd" (__port));

}

static __inline void
outw_p (unsigned short int __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outw %w0,%w1\noutb %%al,$0x80": :"a" (__value),
            "Nd" (__port));
}

static __inline void
outl (unsigned int __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outl %0,%w1": :"a" (__value), "Nd" (__port));
}

static __inline void
outl_p (unsigned int __value, unsigned short int __port)
{
  __asm__ __volatile__ ("outl %0,%w1\noutb %%al,$0x80": :"a" (__value),
            "Nd" (__port));
}

static __inline void
insb (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; insb":"=D" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

static __inline void
insw (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; insw":"=D" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

static __inline void
insl (unsigned short int __port, void *__addr, unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; insl":"=D" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

static __inline void
outsb (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; outsb":"=S" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

static __inline void
outsw (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; outsw":"=S" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

static __inline void
outsl (unsigned short int __port, const void *__addr,
       unsigned long int __count)
{
  __asm__ __volatile__ ("cld ; rep ; outsl":"=S" (__addr), "=c" (__count)
            :"d" (__port), "0" (__addr), "1" (__count));
}

#endif  /* GNU C */

__END_DECLS
#endif /* _SYS_IO_H */

Answer 2

C++11 is a version of C++. Unless your version of g++ is extremely old it will support C++11 without problems.

<io.h> is a non-standard header file. You should remove it, but unfortunately it's presence might mean that the code you are trying to compile is also non-standard. In which case you may have trouble getting the code to work in a different environment.

EDIT clang should have no trouble with C++11 either.