I have the CentOS Linux release 7.9.2009 (Core) running in the VirtualBox, which was build by the Vagrant 2.2.19 and the Ansible 2.9.25 installed all the depedencies. On the machine there are installed: gcc 9.3.0 python 3.6.8 node.js 16.13.1 npm…
I can compile and run a program that assigns a long int literal, albeit it one that would fit into an int, to an int variable. $ cat assign-long-to-int.c #include <stdio.h> int main(void){ int i = 1234L; //assign long to…
I've had a bit of a look around Stackoverflow and the wider Internet and identified that the most common causes for this error are conflation of declaration (int var = 1;) and definition (int var;), and including .c files from…
I am trying to understand the following behavior on my gcc setup: % cat t.c #include <limits.h> // -Wtype-limits int type_limits1(unsigned long ul) { return ul >= 0; } int type_limits2(unsigned long ul) { return ul <= ULONG_MAX; } Leads…
Can g++ (gcc) 11.1 be used on Debian Bullseye? Debian 11 (bullseye) is soon to be released, and I am interested in a compiler with C++20 and modules support. Debian 11 currently has gcc 10.2 and clang 11. clang 11…
I have the following source code: foo.h void foo(); foo.cpp #include "foo.h" #include <iostream> void foo(){ std::cout << "This is foo" << std::endl; } main.cpp: #include "foo.h" int main(){ foo(); return 0; } Then I run the following command to…
I already have a pre-installed gcc in debian, and I also have compiled another gcc successfully, which is installed in /root/tools/.But after that, I typed type gcc, it showed gcc is hashed (/bin/gcc) . What does this mean ? My…
After updating GCC to a newer version, $sudo apt-get install gcc-10 I cannot compile C++ with Clang anymore. What is a way to fix this? /usr/bin/ld: cannot find -lstdc++ Ubuntu version: $ lsb_release -a No LSB modules are available. Distributor…
In order to use the C++17 include <filesystem> I need gcc-9 package in my centos 7 docker. By default centos:7 will install gcc 4.8.5 from the regular distro repo. docker run --rm -it centos:7 # yum install -y gcc #…
I have two servers one of which is running RHEL 7.4 and the other one is CentOS 8 the RHEL comes with gcc 4.8.5 and libc.so.6 at 2.17 the CentOS comes with gcc 8.3.1 and libc 2.28 I built a…