I am trying to run a c++ code however, io.h is not found. It is shown as Additionally, I am getting a bunch of weird problems (for a code that is rather > 16 years old): or or or or or or I wonder if these are related to io.h not being found. I have CLion 2020.2.3 and Answer Add
Tag: gcc
How can I fix this “undefined reference” error using G++ and CPLEX?
I apologize if this is not the correct community to ask this on, in that case, please tell me which one is. I tried some IBM forums but I get a (general?) error when I try to start a thread there. I am decently experienced with CPLEX (on Windows, with visual studio c++), but when I try to compile the
What is cflags’s function?
In this issue, CFLAGS set as path: https://unix.stackexchange.com/questions/149359/what-is-the-correct-syntax-to-add-cflags-and-ldflags-to-configure In this issue, CFLAGS set as compile option: How to use LDFLAGS in makefile I am confused. Answer CFLAGS stands for compiler flags. LDFLAGS is for linker flags. …
CPU you selected doesn’t support x86-64 instruction set
I want to compile a program which has lots of 32-bit static libraries which I cannot recompile to 64-bit because the lack of makefiles but there are some libraries that I should compile to obtain some static libraries to use alongside them. One of the libraries that I want to compile has a Makefile as follows…
can you guys help me to debug a simple c program with gcc and make it work? (student problems..) [closed]
Closed. This question needs details or clarity. It is not currently accepting answers. Want to improve this question? Add details and clarify the problem by editing this post. Closed 2 years ago. Improve this question Hello guys so my question is can you help me to debug a simple c program with gcc and make i…
what’s the meaning of exit code of program with empty void main()?
I made a simple C program with empty main as given below and compiled it with gcc upon execution, it return exit code as 25, and if I add a printf statement,after including stdio.h, it returns exit code 5 what’s the meaning of 25 and 5 here and why it’s being returned by whatever code that is exec…
Rst packets sent with libnet do not reset the connection
I am trying to do ‘rst hijacking’ by using a c script with libcap and libnet included. I use libcap to sniff all packets coming from and going to a host given as input to the program via the commandline. Then libnet sends rst packets to the host trying to connect to the specified host. However whe…
Execute binary file inside C code (No system())
I am trying to execute a binary executable file inside C code without using system since it has security and resource management issues. The system used here is Debian Buster with kernel 5.4.0-2-amd64 and gcc 9.2.1. I used the method in this question: execute binary machine code from C which is to convert exe…
GCJ throws error: “Undefined reference to main” when compiling
I´d wanted to compile a simple Java “Hello World” program like it was repesented on the GeeksforGeeks Hello World Tutorial, by using gcj in Linux Ubuntu. This is the source code: But gcj threw two errors: (.text+0x18): undefined reference to main collect2: error: ld returned 1 exit status Original…
How to compile / link / build a small sized Loadable Kernel Module ( LKM )?
I successfully built this trivial LKM with gcc but the resulting binary is of size 70kB. What CFLAGS and make arguments would you suggest to make it smaller? Answer The standard Linux kernel is compiled in an optimal way already unless it’s a debug version or some very specific options are turned on. So…