42,278 questions
0
votes
1
answer
62
views
Unfreeable Memory when Using Capstone
I disassembled a 7,838,304-Byte portion of /usr/lib/x86_64-linux-gnu/dri/i965_dri.so using Capstone as shown below:
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#...
- 940
1
vote
0
answers
59
views
Recommended RStan compiler flags for gcc
I need to install RStan and I want to make sure that it's as efficient as possible. I'm using gcc. I'm reading this guide from 2022.
Luckily, the Stan developers built an option called STAN_CPP_OPTIMS
...
- 705
11
votes
1
answer
641
views
constexpr self-referencing struct
Consider the following simplified code:
template <class T> class Foo {
T t;
const T* t_ptr;
public:
constexpr Foo(T t): t(t), t_ptr(&this->t) {}
constexpr Foo(const Foo&...
- 4,126
1
vote
0
answers
98
views
interrupt(): gate descriptor is not valid sys seg (vector=0x0X)
I am making my own UNIX like OS called Connor's UNIX and I am implementing kernel and userspace separation and I have been all day and this is as far as I can get it to work and if you need any more ...
-1
votes
0
answers
67
views
i686-elf-gcc "Error: invalid instruction suffix for 'push'/'pop'" [closed]
I'm following the barebones guide on OSDev Wiki and I'm trying to compile my kernel.c file with
i686-elf-gcc -ffreestanding -O2 -m32 -c kernel.c -o kernel.o
but I constantly get the following ...
3
votes
2
answers
108
views
Handling Buffer Size Errors in strftime: ERANGE vs EOVERFLOW
I have an application where I need to generate date and time based on the locale using the strftime function provided by C's time.h:
#include <stdio.h>
#include <time.h>
#include <...
- 41
2
votes
0
answers
46
views
Best way to successfully compile GNU-pth as a 32-bit dynamic library under Linux?
Regardless of --build or --target, when configure points out the
I'm trying to compile GNU pth in 32-bits form under Linux.
Toolchain used:
Ubuntu 24.04.2 (VM)
gcc (Ubuntu 13.3.0-6ubuntu2~24.04) 13....
Advice
0
votes
4
replies
191
views
Why does GCC transform a >= 4 into a > 3 at -O0? JG seems to be more complex than JGE
Title: Why does GCC transform a >= 4 into a > 3 at -O0? JG seems more complex than JGE
I'm analyzing a simple C code on godbolt and found GCC's code generation puzzling:
long a;
a = a >= 4;
...
- 27
Tooling
0
votes
0
replies
45
views
How do you set up GCC for Windows with the Windows 10 SDK?
A friend of mine has an application in C he has been helping to maintain, which he has been building for Linux, but he asked me to help build Windows binaries. The project has a Makefile.win32, so it ...
- 351
Advice
0
votes
1
replies
42
views
Adding stack information to jit'd code for sanitization
Disclaimer: I'm expecting that the answer to this question will be that it can't be done, but I'm asking as a just in case.
I am working on a JIT'd language with the compiler and runtime implemented ...
- 131
Tooling
0
votes
3
replies
98
views
Which IDE and tools for gcc C development?
Which IDE and tools are best suited for gcc C development? I currently use vscode and the tried using the ms-vscode.cpptools extension which "supports" gcc C. But extensions like nested ...
- 11
Advice
2
votes
6
replies
121
views
determine cpu after c++ compilation with gcc?
Does anyone know if there is, in c++, any way to determine at runtime the cpu characteristics of the machine that compiled the code? For example, in gcc (which I'm using) the preprocessor variable ...
- 95
Advice
0
votes
6
replies
80
views
object file is twice larger than expected
I have a AVR GCC toolchain compiled to work on aarch64-linux-gnu devices (ARM64) and it produced twice larger file (around 35Kb) than almost identical command-line on desktop (mac silicon, around 20Kb)...
- 20.6k
3
votes
1
answer
120
views
std::filesystem::path::parent_path() GCC vs Clang behavior with multiple leading separators
I stumbled upon different behavior of std::filesystem::path::parent_path() when a path contains leading slashes. Clang says that the parent of ///a is /// (which is what I would expect), but GCC says ...
- 705
1
vote
2
answers
149
views
Different handling of signed value between MSVC and GCC
Take the below piece of code, that simply Trims a string, removing whitespace characters from either end:
const std::string TrimString(const std::string& s)
{
const auto iter = std::find_if(s....
- 1,099