All Questions
5,998
questions
311
votes
4
answers
168k
views
What are the differences between .so and .dylib on macOS?
.dylib is the dynamic library extension on macOS, but it's never been clear to me when I can't / shouldn't use a traditional unix .so shared object.
Some of the questions I have:
At a conceptual ...
- 3,469
238
votes
16
answers
143k
views
Finding current executable's path without /proc/self/exe
It seems to me that Linux has it easy with /proc/self/exe. But I'd like to know if there is a convenient way to find the current application's directory in C/C++ with cross-platform interfaces. I've ...
- 2,601
217
votes
11
answers
272k
views
How do you install Boost on MacOS?
How do you install Boost on MacOS?
Right now I can't find bjam for the Mac.
- 69.5k
178
votes
19
answers
647k
views
How can I compile and run C/C++ code in a Unix console or Mac terminal?
How can I compile/run C or C++ code in a Unix console or a Mac terminal?
- 11.1k
136
votes
11
answers
78k
views
"please check gdb is codesigned - see taskgated(8)" - How to get gdb installed with homebrew code signed?
I'm under osx 10.8.4 and have installed gdb 7.5.1 with homebrew (motivation get a new gdb with new features such as --with-python etc... )
Long story short when I run debug within a c++ Eclipse ...
- 1,935
127
votes
8
answers
195k
views
Compiling simple Hello World program on OS X via command line
I've got a simple hello world example that I'm trying to compile on OS X, named hw.cpp:
#include <iostream>
#include <string>
using namespace std;
int main() {
cout << "Hello ...
- 16.3k
127
votes
9
answers
255k
views
C++ IDE for Macs [closed]
I teach a C++ course using Visual Studio. One of my students has a Mac and was looking for an IDE to use on his machine. What would be good to recommend?
- 8,779
124
votes
8
answers
62k
views
Qt Creator - Project ERROR: Xcode not set up properly. You may need to confirm the license agreement by running /usr/bin/xcodebuild
I just installed Qt 5.5 and am using Qt Creator for the first time on OS X. When I first installed Qt, it gave me an error message 'Xcode 5 not installed' which I thought was strange, (I have the ...
- 8,871
101
votes
3
answers
155k
views
How to use Libraries
For some reason I'm never able to use external libraries in any language. I'm looking for instructions/explanations of how to use external libraries, as well as how they work. When I search online, I ...
- 11.3k
87
votes
10
answers
100k
views
How to Compile for OS X in Linux or Windows?
I would like to port my C/C++ apps to OS X.
I don't have a Mac, but I have Linux and Windows. Is there any tool for this?
- 46.5k
77
votes
2
answers
113k
views
How to compile C++ with C++11 support in Mac Terminal
I wanted to compile C++11 source code within Mac Terminal but failed. I tried g++ -std=c++11, g++ -std=c++0x, g++ -std=gnu++11 and g++ -std=gnu++0x but nothing worked. Terminal always read ...
- 7,494
67
votes
5
answers
16k
views
Missing C++ header <__debug> after updating OSX Command Line Tools 6.3
After updating to Command Line Tools 6.3 from the App Store, programs including <vector> or <iterator> which internally include <__debug> will cause file not found error as follows. The ...
- 1,190
66
votes
9
answers
132k
views
Update GCC on OSX
So I am a new programmer and I just installed XCode on my Macbook to get the GCC. I think Xcode is the only way for getting GCC on OSX. Now when I run my Hello World application, in C++, g++ comes up ...
- 685
65
votes
7
answers
43k
views
Where are clang-format and clang-format.py in Mac OS X with Xcode Command Line Tools installed?
I am having a hard time finding clang-format and clang-format.py on my Mac OS 10.8.5 with Xcode 5 and its Command Line Tools. I tried find / -name "clang-format.py" without luck. Are they already here ...
- 6,730
63
votes
6
answers
43k
views
Which macro to wrap Mac OS X specific code in C/C++
While reading various C and C++ sources, I have encountered two macros __APPLE__ and __OSX__. I found plenty of use of __OSX__ in various codes, especially those originating from *BSD systems.
...
- 38.1k
55
votes
16
answers
33k
views
Catalina C++: Using <cmath> headers yield error: no member named 'signbit' in the global namespace
After upgrading to Catalina from Mojave, Setuping: /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.15.sdk in the env.
I'm unable to compile a program that ...
- 671
54
votes
14
answers
58k
views
How to Detect the Number of Physical Processors / Cores on Windows, Mac and Linux
I have a multi threaded c++ application that runs on Windows, Mac and a few Linux flavors.
To make a long story short: In order for it to run at maximum efficiency, I have to be able to instantiate ...
- 619
52
votes
2
answers
46k
views
How to dump the symbols in a .a file
Can you please tell me how can I dump all the symbols in a .a file on MacOS X?
I am getting a linking error while compiling my c++ problem on MacOS X. I would like to find out if the sybmols exists ...
- 20.1k
52
votes
8
answers
53k
views
macOS Clang C++17 filesystem header not found
I need to write a program using the (experimental) C++17 filesystem library but clang on my Mac (macOS 10.12.03) doesn't seem to have the filesystem header included.
Since I'm required to use the C++...
- 644
51
votes
9
answers
60k
views
Error when compiling some simple c++ code
I try to compile this cpp code on osx lion but I get an error.
#include <iostream>
using namespace std;
int main (int argc, char *argv[])
{
for(int i = 0; i < 10; i++)
{
...
- 6,765
50
votes
10
answers
45k
views
How to get a "codesigned" gdb on OSX?
Because I need a Python-enabled gdb, I installed another version via
brew tap homebrew/dupes
brew install gdb
I want to use this gdb with Eclipse CDT, where I entered the path to the binary in the ...
- 22.2k
48
votes
1
answer
66k
views
Installing C++ Libraries on OS X
I am trying to get my head around some basic concepts, but I can't seem to figure them out.
I am really confused over what it means to install (I think they are called libraries) for C++. I am ...
- 632
47
votes
4
answers
63k
views
c++ #ifdef Mac OS X question
I am fairly new to C++. I am currently working on a group project and we want to make our classes compatible with both the lab computers (Windows) and my computer (Mac OS X).
Here is what we have ...
- 471
46
votes
3
answers
49k
views
How to use the gcc installed in macports?
I installed gcc 4.6. from macports (for support of C++0x). But when I check the 'gcc --version` it is showing older version. How to use the newer gcc installed by macports?
- 25k
46
votes
3
answers
74k
views
Undefined symbols for architecture x86_64: Which architecture should I use?
I'm trying to do some really simple stuff in C++, but I can't find any information on how to tackle this. Even the book I have just says "Just compile and run the program".
test.cpp
#include <...
- 1,376
46
votes
2
answers
54k
views
How to link against boost.system with cmake
I use a cmake generated makefile to compile a c++ file that depends on the boost filesystem library.
During the linking process I get the following error:
Undefined symbols:
"boost::system::...
- 189k
46
votes
23
answers
121k
views
How can I include <bits/stdc++> in Xcode
I have tried to include the header file bits/stdc++ in my C++ code, but it seems the compiler doesn't support it. Is there any way to make it work?
I use OS X Yosemite 10.10.2 and Xcode 6.1.1.
- 831
46
votes
4
answers
72k
views
OSX - replace gcc version 4.2.1 with 4.9 installed via Homebrew
This has been plaguing me for awhile now. I am trying to compile a huge C++ file (I know it works as I it works fine on my Arch Linux computer at work). When I checked my GCC version on my mac It ...
- 591
44
votes
4
answers
58k
views
Clang C++ Cross Compiler - Generating Windows Executable from Mac OS X
I have created a C++ application using Xcode on my Mac using the Clang compiler.
I want to compile my source files to create an executable that can be ran on a windows machine however I cant get ...
- 642
43
votes
8
answers
23k
views
Broken c++ std libraries on macOS High Sierra 10.13
I recently bought a new MacBook on which I transferred my old session. Since then, and after i upgraded to 10.13, i can't get clang to compile anything including only iostream.
Given this program :
...
- 538
40
votes
3
answers
37k
views
Find out if/which BLAS library is used by Numpy
I use numpy and scipy in different environments (MacOS, Ubuntu, RedHat).
Usually I install numpy by using the package manager that is available (e.g., mac ports, apt, yum).
However, if you don't ...
- 579
40
votes
6
answers
74k
views
How to enable C++17 on Mac?
I am able to update gcc on Linux to get -std=c++17, but cannot do the same on Mac.
Is there a version of Clang I can update to or some other alternative to get C++ 17 on my Mac?
Please help.
Thanks.
- 401
39
votes
2
answers
35k
views
Develop using OpenGL 4.x on OSX Big Sur
According to Apple, OpenGL is no longer supported. However, it appears v4.1 of OpenGL was supported on many devices as of July 28, 2020. I have a 2020 Macbook Pro 16" model, which does not show ...
- 906
37
votes
4
answers
83k
views
How to use dylib in Mac OS X (C++)
I made an application (an executable) calling some dylib successfully. However, the dylib files and the executable are in different directory. I added the directory contains dylib files to the $PATH ...
- 371
34
votes
5
answers
25k
views
Relative Paths Not Working in Xcode C++
There are numerous post over the net that detail how relative paths don't work in Xcode. I do have an Xcode template that I downloaded where the relative paths DO work, however I have not been able to ...
- 47.1k
34
votes
3
answers
36k
views
Object file was built for newer OSX version than being linked
I'm getting this error for C++ library I'm using. It uses GNU Automake for building. Which flag(s) I should supply for the make command to lower the target build platform to avoid seeing this warning ...
- 2,982
33
votes
3
answers
63k
views
Colored output in C++
Is there a way to print colored output using iostream and Xcode? I'd like to be able to, for example, print Hello World! with Hello red, World blue and ! yellow. How can I do that?
- 75.8k
32
votes
9
answers
33k
views
Unique hardware ID in Mac OS X
Mac OS X development is a fairly new animal for me, and I'm in the process of porting over some software. For software licensing and registration I need to be able to generate some kind of hardware ID....
- 23.3k
32
votes
8
answers
103k
views
Qt FullScreen on Startup
I want to start an application on fullscreen (MacOS 10.8.x, Qt 5.1.1, C++) depending on the settings:
main.cpp
#include "MainWindow.h"
#include <QApplication>
int main(int argc, char *...
- 29.3k
32
votes
2
answers
41k
views
Installing Eigen on Mac OS X for XCode
A while back it was a nightmare for me trying to get Eigen up and running on my mac for XCode, but a friend managed to figure it out and shared the instructions with me. I don't want anyone to go ...
- 817
32
votes
1
answer
2k
views
What is going on: C++ std::move on std::shared_ptr increases use_count?
I was always assuming that std::move() on a std::shared_ptr steals the pointer and sets the pointer of the original to nullptr-thus not increasing the reference count. That does not seem to be true in ...
- 3,312
31
votes
1
answer
100k
views
How do I run a C++ program in Xcode 4?
I want to write a C++ program in Xcode on my Mac. I wrote this basic one to test it. When I build, I get a "Build Successful" message.
However, I cannot run it! If I hit Command+R nothing happens. ...
user445338
31
votes
6
answers
202k
views
How do I install g++ on MacOS X?
I want to compile C++ code on MacOS X, using the g++ compiler. How do I install it?
- 25.9k
31
votes
3
answers
42k
views
Rewinding std::cout to go back to the beginning of a line
I'm writing a command-line tool for Mac OS X that processes a bunch of files. I would like to show the user the current file being processed, but do not want a bazillion files polluting the terminal ...
- 35.8k
30
votes
2
answers
45k
views
How to install gtk on OSX for use with g++/gcc compiler
I already asked this question at apple.stackexchange.com, but I was told it was the wrong place for this question - so I will ask it here, as I was suggested to do.
At my university we got the task ...
- 6,552
29
votes
1
answer
20k
views
How do I turn a "fat" library into a "non-fat" library?
I'm trying to remove a duplicate object from a library with armv6 and armv7 architectures, i.e.,
$ lipo -info libx.a
Architectures in the fat file:
libx.a are: armv6 armv7
As expected, "ar d" ...
- 23.1k
29
votes
2
answers
35k
views
dSYM Directories While Compiling C++ Code in MacOS
Why compiling C++ in Mac always create *.dSYM directories?
Is there a way to disable that?
- 63.1k
29
votes
1
answer
696
views
`is_always_lock_free` gives `true` but `is_lock_free()` gives `false` on macOS, why?
I'm experimenting with C++ atomic's std::atomic<T>::is_always_lock_free and std::atomic<T>::is_lock_free.
I wrote a simple struct A and want to know if the atomic version of A is lock-free:...
- 1,125
28
votes
2
answers
32k
views
linking with clang++ on OS X generates lots of symbol not found errors
I'm trying to compile some C++ code (including C++11 features) on OS X 10.8 using the clang++ compiler. I have a makefile that generates the object files OK, then on the command:
clang++ -o Analysis....
- 1,489
28
votes
7
answers
29k
views
gprof reports no time accumulated
I'm trying to profile a C++ application with gprof on a machine running OSX 10.5.7.
I compile with g++ in the usual way, but using -pg flags, run the application and try to view the call graph with ...
- 24.3k