cxx-abi | C++ ABI Summary | Code Quality library
kandi X-RAY | cxx-abi Summary
kandi X-RAY | cxx-abi Summary
C++ ABI Summary
Support
Quality
Security
License
Reuse
Top functions reviewed by kandi - BETA
Currently covering the most popular Java, JavaScript and Python libraries. See a Sample of cxx-abi
cxx-abi Key Features
cxx-abi Examples and Code Snippets
Community Discussions
Trending Discussions on cxx-abi
QUESTION
I can't install Onboard-SDK on my raspberry PI. What I should do? I used instruction from and was blocked during use cmake ..: https://developer.dji.com/onboard-sdk/documentation/quickstart/development-environment.html
pi@raspberrypi:~/Onboard-SDK/build $ lsb_release -a
...ANSWER
Answered 2021-May-03 at 08:45The error message is pretty clear
Cannot Find FFMPEG
You can install it via sudo apt install ffmpeg libavcodec-dev libavformat-dev libavfilter-dev
QUESTION
I am trying to implement a fixed size multi-dimensional array whose size is determined at runtime. with the (2) overload of make_shared
(template shared_ptr make_shared(std::size_t N) // T is U[]
). However, I am facing compilation errors (logs below). The error is not present if I change the shared
s to their unique
counterparts. My question is,
- What is this error about?
- Why
unique
works? - Any better way to implement such runtime-fixed multi-dimentional array container?
Minimal working example:
...ANSWER
Answered 2021-Apr-22 at 09:39For your first question "What is this error about?":
GCC libstdc++ and Clang libc++ has no support for "Extending std::make_shared()
to support arrays " which introduced in c++20 yet. So these compilers will try to use template< class T, class... Args > shared_ptr make_shared( Args&&... args );
, which trying to forward your arguments (in this case, a cell_t
= std::size_t
) to construct a std::shared_ptr[]
. It cannot be done, so they complain about it.
You can check compiler compatibility here: Compiler support for C++20
QUESTION
I'm trying to compile a hello world program in C using gcc
I'm using gcc 9.3.0 & ubuntu 20.04
this is my c program 'hello.c'
...ANSWER
Answered 2021-Feb-07 at 08:29The issue was mentioned by @AnttiHaapala: By the instructions ask you to set the prefix to /usr/local/i386elfgcc - maybe you've accidentally dropped this out from the binutils config and installed binutils in /usr/bin instead
The solution was uninstalling the binutils and install it again
sudo apt-get remove binutils
sudo apt-get remove --auto-remove binutils
sudo apt install build-essential
Now the binutils version is 2.34, earlier it was 2.24
QUESTION
I wrote this code and found that it acts differently with different versions of gcc.
The source code,
...ANSWER
Answered 2021-Mar-13 at 16:03Returning the address of a local variable and trying to access it after its lifetime is over is undefined behavior, rationalizing what happens under the hood is a fool's errand because there are no standard rules to be followed (appart, of course, from the aforementioned and linked UB rules), it's quite common different compiler versions changing the way a situation like this is dealt with.
QUESTION
My operating system is Windows x64
When I try to make ACE using Cygwin I get the following compilation error:
...ANSWER
Answered 2021-Mar-01 at 08:40The cygwin64 port isn't actively maintained so you need to update the ace/config-win32.h for this. You need to try which defines should be added to that file, when you have done that and it works, contribute your changes upstream at https://github.com/DOCGroup/ACE_TAO
The issues section at https://github.com/DOCGroup/ACE_TAO is a better place for any ACE questions.
QUESTION
How to build MPICH with gfortran-10, gcc-10 and g++-10?
BackgroundI want to build MPICH with grortran-10 so as to be able to use up to date MPI bindings, but I haven't managed to do so. Trying to install MPICH via apt on Ubuntu always uses gfortran 7.5.0 (same version with gcc and g++), even if I have latest version of gfortran installed. Just for clarity, here is my current MPICH and gfortran configuration (installed via apt) :
...ANSWER
Answered 2021-Jan-17 at 10:30I followed advice VladimirF gave me in the comments, and everthing worked out. This site provided all the necessary guidelines. Only a few minor problems had to be dealth with. Before I could create ./configure
file, I was prompted to install some missing autotools, which was simply done using apt
. Once ./configure
file was ready, I passed in the mostly same configuration that apt
originally installed MPICH with (see the long list original question), with 'FC = gfortran-10' 'CC = gcc-10' 'CXX = g++-10'
replacing 'FC = gfortran' 'CC = gcc' 'CXX = g++'
. Several more prompts had to be dealt with (mostly adding something to configuration or installing missing packages, easily done with Synaptic package manager). After doing all the steps, F08 bindings were succesfully built and work properly. Here is my current MPICH configuration :
QUESTION
I have some Fortran code I would like to paralelize with MPI. Appereantly, recomended way to use MPI (MPICH, in my case) with Fortran is through mpi_f08
module (mpi-forum entry on the matter), but I have trouble making it work, since corresponding mod file is simply not created (unlike mpi.mod
, which works fine, but it's not up to date with Fortran standart). This discussion left me under the impression it's because gfortran can't build the F08 bindings. Below you can see my configuration, both gfortran and mpich have been installed throught apt install on ubuntu and should be up to date. I'm unsure about a few things :
- Is there any way to make the Fortran 2008 MPI syntax work with gfortran? From what I came across, it seems the answer is no, but hopefully someone may know a fix. I'm not too versed in this, so any relavant links or more entry level explanation would be greatly appreciated.
- Could using different compiler help? Intel compiler* maybe? I would rather stick with gfortran if reasonable.
- Maybe consistency with current standart isn't such a big deal. From your experience, would it be better to just go with support through mpi.mod module? What problems could I expect then? My application doesn't have much long term ambition, so falling out of support some time later isn't a big problem if it works properly now.
It seem's to have been problem of using outdated version of gfortran. This reduces my question to how to build MPICH with gfortran-10.
* hence the [intel-fortran] tag, feel free to remove it if you think it redundantJust for clarity, there's my gfortran and mpich configuration
...ANSWER
Answered 2021-Jan-16 at 14:57MPICH requires the Fortran compiler to support the array descriptor of Technical Specification 29113, and this is only supported in recent versions of gfortran
(GNU 10 is ok).
Intel compilers have been fine for a while fwiw.
Note that Open MPI is not that picky w.r.t. TS 29113 and does not need support for the array descriptor. GNU 7.5 can be used to generate the mpi_f08
module.
Bottom line, you have two options w.r.t. the mpi_f08
Fortran module:
- use a Fortran support that meets MPICH expectation w.r.t. TS 29113 (e.g. GNU 10, or Intel compilers for example)
- move to Open MPI
QUESTION
I was trying to make a Makefile so I can develop my code a bit faster. My Makefile is the following:
...ANSWER
Answered 2020-Dec-09 at 18:29The problem is this:
QUESTION
I have the following code that reads 4 numbers from user input:
...ANSWER
Answered 2020-Nov-21 at 14:05It seems that in your specific environment the Enter key you press to confirm you input is interpreted as a raw '\n'
. The original meaning of this character, in fact, is line feed, that means "change line without performing a carriage return" ('\r'
).
In most terminals the enter key sums the effects of \r
and \n
, and this doesn't happen in your case.
To work it around try inserting manually a '\r'
after the input insertion:
QUESTION
So I'm trying to compile a C file to .bin and then add it to an .img file after my first stage bootloader.
I have found these bash commands in this answer by user Michael Petch:
ANSWER
Answered 2020-Sep-28 at 18:00By deeper searching, it can be easily found out that the __main
(with an additional underscore internally) is the actual entry point for programs.
The same problem is mentioned in the following two answers:
Both of which claim some form of a connection to the -lgcc
option and the libgcc library.
Renaming main
to __main
works, but is not recommended (the entry point for kernels is apparently by convention kmain
as seen in other questions and answers)
The __main
function is what a OS calls when starting a program and it usually contains (for example) a call to exit()
(passing the return code from main
if it's return type is int) and some other underlying system calls (which are probably system specific, more research would need to be done here)
GCC expects you to include a __main
function even on standalone compilations, since it's by specification (or that's what I seen people claim) the default entry point for all applications
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install cxx-abi
Support
Reuse Trending Solutions
Find, review, and download reusable Libraries, Code Snippets, Cloud APIs from over 650 million Knowledge Items
Find more librariesStay Updated
Subscribe to our newsletter for trending solutions and developer bootcamps
Share this Page