Questions tagged [clang]
compiler front end for C, C++, Objective-C
15 questions
1
vote
1
answer
219
views
Switching out implementation source files in C project
For simplicity, let's say I have the following C project structure:
src/
utils/
logger.c
logger.h
main.c
secondary_component.c
main.c starts with:
#include "utils/logger.h"
I would ...
- 123
2
votes
3
answers
3k
views
How to prevent 'global variables' in a big project?
With 'global variables', I mean
Variables on namespace level
Static data members in classes
Static variables in functions
In a big C++ project I would like to have a mechanism (like a compiler option) ...
- 131
0
votes
1
answer
125
views
When is it a good idea to test a build with both clang and gcc?
I am peeking through the code of torsocks where as you'll notice, the .travis.yml file instructs Travis CI to test against both clang and gcc.
compiler:
- clang
- gcc
I'm still learning and this ...
- 111
2
votes
1
answer
106
views
Does an explicit temporary of an integral type qualify as an integral constant expression?
In the following code, int() is an explicit type conversion.
#include <iostream>
int main()
{
void* ptr = int();
return 0;
}
Clang Compiler:
source_file.cpp:5:11: error: cannot ...
- 133
18
votes
1
answer
4k
views
Why does LLVM have an assembly-like IR rather than a tree-like IR? Or: why do projects target LLVM IR instead of clang's AST?
Why is LLVM's intermediate representation (LLVM IR) assembly-like rather than tree-like?
Alternatively, why do language implementations target LLVM IR rather than clang's AST?
I'm not trying to ask ...
- 1,674
8
votes
2
answers
885
views
Is it wise to use Clang for personal code analysis in a project that builds with gcc?
I started to work on several C projects that are building using gcc. I believe this choice was made for several reasons:
Had to cross-compile for arm very early on (I think).
Performance is the first ...
- 271
1
vote
1
answer
210
views
Cross compiling: Share compile steps between different target platforms?
For a C project, I'm upgrading my build process from
MingGW-GCC / make and Android Studio under Windows (2 separate processes)
to
Clang / CMake under Debian 8, using wclang and wine to compile and run ...
- 781
2
votes
1
answer
278
views
How are objects stored in unordered_sets?
I've been doing a bit of research on the subject. I know unordered_sets are hash tables, where the key and value are one and the same. What I'd like to know is how the compiler figures out where in ...
- 2,063
2
votes
1
answer
647
views
Why isn't the isa pointer hardwired in Objective-C classes?
I've been studying the Objective-C runtime for some years, and even hacked libobjc a little bit (both Apple's and GNUStep's), and I've been wondering about a design decision on the compilers.
Every ...
- 173
13
votes
3
answers
5k
views
C++: Metaprogramming with a compiler API rather than with C++ features
This started out as a SO question but I realized that it is quite unconventional and based on the actual description on the websites, it might be better suited to programmers.se since the question has ...
- 539
1
vote
2
answers
482
views
How could Clang release under BSD license?
I found that llvm could only generate assembly code. If someone want generate and link assembly code to native executable code, they should use external tool(GNU as/ld, for example. Currently lld is ...
- 113
103
votes
5
answers
24k
views
Clang warning flags for Objective-C development
As a C & Objective-C programmer, I'm a bit paranoid with the compiler warning flags.
I usually try to find a complete list of warning flags for the compiler I use, and turn most of them on, unless ...
- 1,156
27
votes
4
answers
14k
views
GCC vs clang/LLVM -- pros and cons of each [closed]
What are the pros and cons of GCC vs clang/LLVM?
- 704
7
votes
4
answers
5k
views
Reason to use mingw win32 headers and libs with LLVM/Clang
Is there any good reason (except "GCC is better") to use the MinGW win32api/headers/libs with LLVM/Clang. Suppose that in two to three years, Clang has matured enough (in C++0x and performance) that ...
- 590
9
votes
3
answers
2k
views
Is Clang/LLVM ready for prime time? [closed]
Clang is able to be used instead of gcc? What your experience on that? What disadvantages there are yet?
Performance of compilation is very better than gcc but about performance of code generated ...
