Questions tagged [c]
is for C source code editing, completions, formatting, compiling, folding, searching, executing, syntax checking, debugging, and other modern IDE features that Emacs supports.
111
questions
0
votes
1
answer
53
views
C offset is 2 with treesit
I recently started using treesit and I'm noticing with C files, my auto-indent is 2 spaces. How can I fix this to make it 4 spaces again? I've tried c-basic-offset.
- 135
2
votes
2
answers
1k
views
C/C++ with tree sitter: how to change indent?
I use Emacs with tree sitter for c++ code (c++-ts-mode).
With usual c++-mode I've used this fix for me:
(c-set-offset 'inline-open '0)
but I don't understand how to do it in new c++-ts-mode.
In ...
- 223
0
votes
1
answer
74
views
Emacs not opening existing file, only opens new file
I recently started coding in C (college class) and use Emacs as my primary text editor. In my class, we use the terminal to create new files and open existing ones, and I decided I wanted to be able ...
0
votes
0
answers
63
views
How to configure Emacs to support indented C preprocessor statements?
In some cases I deal with code that has heavily indented C preprocessor statements and want to setup Emacs to work with it without changing that indentation and follow the same indentation when having ...
- 786
0
votes
1
answer
152
views
flycheck can't find header file even though flycheck-clang-include-path configured
I am using Doom Emacs as my editor for C. I'm trying to use glib in my C project and for that I'm including glib.h.
I have added the include dirs displayed by pkg-config --cflags glib-2.0 to flycheck-...
- 1
0
votes
0
answers
25
views
How to set brace style for empty function in Doom emacs?
When defining an empty function Doom emacs makes it such that the function automatically looks like this:
// after inserting braces
void my_func() {}
// after pressing enter
void my_func() {
}
/...
- 95
0
votes
0
answers
42
views
Can not get irony-mode to show completions
I'm a new Emacs user, and want to get autocompletion in C using irony-mode.
I installed elpa-irony using apt, as well as irony-server using apt, as the CMake compilation fails.
I added these lines to ...
0
votes
0
answers
27
views
Make ff-find-other-file ignore include directive in C
I have a binding setup as described here, the problem is every time the cursor is on #include "file" it always tries to jump on this include. I want that no matter where there cursor is I ...
- 111
0
votes
1
answer
75
views
Babel C++ blocks have incorrect indentation
When using a C++ source block in org-mode, the indentation doesn't match that of the C++ major mode.
Viewing the source block in the org file:
Viewing the same code in a C++ mode buffer or using org-...
- 1
0
votes
0
answers
146
views
When using company and lsp, why does the placeholder text sometimes not get replaced?
In a buffer in c-mode with the following content (with point after retu), pressing enter completes to return expression;.
int main(int argc, char** argv) {
retu
}
Point is now at the beginning of ...
- 143
0
votes
0
answers
131
views
Rewriting paths for bazel
The Bazel build tool has some features that interact poorly with emacs. When you build a C/C++ project for sandboxing purposes it makes a crazy hierarchy of symlinks, and uses them when invoking GCC. ...
- 2,061
0
votes
0
answers
27
views
Emacs displays letters and spaces as newlines until a non-letter/space char is entered
I am editing a C file, and it suddenly starts moving to a new line instead of showing the character I typed. This seems to be for letters and space.
However, it has saved the characters, and if I type ...
0
votes
1
answer
125
views
Emacs displays different formatting than what actually is
I have been using emacs for a while now, I am relatively new to it but while editing i noticed that sometimes emacs will show the code correctly formatted, when i open it with another text editor ...
1
vote
0
answers
25
views
Customized c-mode indentation style in Emacs 27.2
I would like to produce c code in the following format:
char *ft_strdup(const char *s1)
{
char *h;
size_t len;
...
}
Where I can tab after the type of the function signature and ...
1
vote
1
answer
116
views
Is there a way to display breadcrumbs in C mode in a headerline or another window
I am using emacs (GNU Emacs 25.3.2) on Ubuntu. I was wondering if its possible to display short breadcrumbs or selected compound statement in a headerline (even another window is fine). Probably I am ...
- 111
0
votes
0
answers
12
views
Strange flush left C-code formatting in Emacs 24.3 of SLES 12 SP5
I see some odd Emacs behavior in C-mode recently.
I suspect that the change happened either when switching from SLES 12 SP4 to SLES12 SP5 (both have Emacs 24.3), or when switching from SLES 11 SP4 (...
- 193
3
votes
1
answer
200
views
How to get the following indentation style in c?
I would like to have the following behavior:
int main(){
to result in:
int main(){
|
}
Where pipe is the cursor, and I DON'T have to press RETURN key after '{'.
I have already achieved the ...
- 171
1
vote
1
answer
303
views
How do I populate tags for C?
I hover over stdlib:
#include <stdlib.h>
I type M-. and it asks me:
Visit tags table (default TAGS):
I don't have one of those. I see a lot of information about TAGS in the emacs ...
- 319
0
votes
2
answers
925
views
How to use C header files in org-mode source code blocks?
I have a C code block in my org-mode document like the following:
#+begin_src C :exports both
#include "my_header.h"
int main(void)
{
function_from_my_header();
return 0;
}
#+...
- 203
2
votes
1
answer
257
views
Emacs not indenting enum / enum class contents
I've got a small problem to do with Doom Emacs / Emacs. Enum contents are not indented at all...
Here's what I would like:
enum class RandomEnum
{
A,
B,
C,
D
};
Here's what I get:
...
- 95
1
vote
1
answer
83
views
How to pass the current scopes function symbol as an argument to an elisp function
I am trying to create an org-capture template which works with yankpad and yasnippets to such that if I am working with some c code like this:
example.c
static int somefunc(int a) {
if (a ==5) {
...
- 183
0
votes
0
answers
257
views
noweb doesn't expand at all
I have a feeling this must be a stupid simple problem however I just can't seem to figure out what I'm doing wrong.
I'm using Doom emacs and trying to use noweb with org mode source code blocks to ...
- 183
1
vote
2
answers
154
views
How to NOT Auto Indent when a specific Character is inputted?
So I recently encountered a problem programming in C that whenever I enter the left parenthesis character, (, Emacs auto-idents the code.
[4 spaces here]DATA *SeqQueueOut(
I know that there is this ...
- 11
3
votes
1
answer
664
views
How to us a shortcut to add semicolon to end of current line?
Is there a shortcut to add a semicolon to the end of the current line of code?
For instance, M-; inserts a comment at the end of the current line of code. Is there anything like that for a semicolon?
...
- 133
1
vote
1
answer
37
views
How to see brief location in the code in C/C++ mode
While editing a long C++ file, I use rtags to jump around. It would be very handy for me to know where I am in terms of where the cursor is relative to the classes-functions. For example, it would be ...
- 896
0
votes
0
answers
49
views
Use iconv directly on the selected region to convert codes
I copied and pasted the C code as:
int main(void)
{
statements
return 0;
}
to org's babel code block, when strike C-c C-c, it report error:
/tmp/babel-uaYVXU/C-src-Pd1SZs.c:11:6: error: stray ‘...
- 1,241
3
votes
1
answer
125
views
Centering within comment blocks or ASCII art
I have C comments like this:
/******************************************************************************
* Includes *
***********...
- 201
1
vote
1
answer
86
views
c-set-style: Error loading guessed style
My company has very specific indentation rules for C code. I want to create a style from those rules, and have it load at startup.
Doing a C/Guess Style From This Buffer and C/Install Last Guessed ...
- 201
0
votes
0
answers
186
views
Where is M-x compile?
I have a basic C file open in c-mode:
#include <stdio.h>
#include <stdlib.h>
int main()
{
return 0;
};
I'm trying to compile it. I type M-x compile expecting to be asked to set my ...
- 319
1
vote
0
answers
47
views
ETAGS with dependencies
I'm trying to use emacs for C development. From here, I understand that in order to see the definitions of functions, I need to use something called etags. My code is:
#include <stdlib.h>
#...
- 319
1
vote
1
answer
418
views
How can I lint a C file?
I have the following:
int main()
{
int a = 1;
int b = 2;
return 0;
};
I am expecting some lint to align the indentation. My file is open with (C/*l AC Abbrev).
I try C-c . which asks me:...
- 319
1
vote
1
answer
259
views
Customize org babel execution command in C
I have the following C code:
#include <stdio.h>
#include <math.h>
int main(){
printf("Square = %d", pow(4,2));
return 0;
}
Now if I run this in the shell. I would first compile ...
- 295
1
vote
0
answers
29
views
fork in org-mode babel source block executes incorrectly
I have this small piece of code on emacs org-mode :
#+BEGIN_SRC C :eval
#+BEGIN_SRC C :fork-example1.c :noweb no-export :eval :flags -Wall -Werror -pedantic
//Fork-exemplec-cours.c
#include <stdio....
- 11
1
vote
1
answer
1k
views
Flycheck does not find .h file
I am using Flycheck for my syntax highlighting which have been working out great when working with all header and source files in one directory.
I recently decided to add some unit tests to test my ...
- 113
0
votes
0
answers
74
views
Stepping through c code in emacs
I am trying to step through code in emacs and am looking for a plugin which will displa the contents of an element when I hover over it. Is there any plugin like this currently? How do you step ...
- 1
1
vote
0
answers
362
views
How do you guys use doxygen? [closed]
I'm curious about Doxygen, how do you guys manage documentation in C/C++ projects on emacs? I didn't find a good package that does it consistently. So far I did use gendoxy and doxymacs. I had ...
1
vote
0
answers
56
views
Is there a package that show the value of constant variables? C/C++
I would like some package that show the variable value when I put cursor on it. The behavior that I expect can be seen in the image below. The image below is in vscode, I would like some package that ...
0
votes
0
answers
22
views
some pointer declarations not colored
macs -nw fails to color code certain declarations of pointer arrays seemingly depending on the structure being pointed to. For example: SomeStruct *one[4] is all white (I have dark background), but ...
- 101
1
vote
1
answer
48
views
Adding rule to indentation
A code base I work on has the macro
#define when break; case
to make switch statements 'cleaner'
However this causes problems with indentation,
Is it possible to set the behavior of 'when' to be ...
- 13
4
votes
1
answer
306
views
Custom indentation for macros in C mode
I'm working in a codebase with an extensive use of function macros and I'm having some difficulty finding the correct way to set indentations with them.
Specifically, we pass a lot of statement lists {...
- 71
3
votes
0
answers
407
views
Valgrind interface for emacs
Is there an interface similar to 'gdb-mi' for using Valgrind in emacs?
What are some ways to use Valgrind inside emacs?
- 439
7
votes
2
answers
574
views
How to transpose two arguments of a function call for C family languages?
How to swap two arguments for C function calls? eg:
my_function(foo, bar, baz);
~~~~~~~~~~~~~^ (cursor location)
Should be transposed to the right to make:
my_function(bar, foo, baz);
The simple ...
- 8,556
1
vote
0
answers
146
views
Align elements of a matrix to the right
I have a matrix in C++
Matrix<double> A = {
{31, -13, 0, 0, 0, -10, 0, 0, 0},
{-13, 35, -9, 0, -11, 0, 0, 0, 0},
{0, -9, 31, -10, 0, 0, 0, 0, 0},
{0, 0, -10, 79, -30, 0, 0, 0, -...
- 111
0
votes
0
answers
196
views
Too much time spent for emacs to open cpp in the project
I use ggtags in order to improve my efficiency. I follow the manual to setup emacs environment.
https://tuhdo.github.io/c-ide.html
However, during editing the cpp files in the projects. Chance are ...
- 781
3
votes
1
answer
691
views
#ifdef __cplusplus nuisance: How to prevent extra indenting?
If you ever wrote header files that have to be used by both C compiler and C++ compiler, you'd encounter this particular ifdef. This construct causes one to insert extra curly braces in the header ...
- 11.3k
0
votes
2
answers
254
views
How to configure C-M-q and TAB key to expand pre-existing TAB characters into spaces in C/C++ files
In C and C++ files, I want to configure the mode so that any time I request indentation, that it will always expand all of the embedded TAB characters in indentation (at the start of the line, and no ...
- 339
-1
votes
1
answer
114
views
Eshell - ./hello command not found(gcc)
emacs was installed by Msys32 on Win7 32bit!
gcc can't run hello.c on eshell but on minibuffer, Why?
- 36
3
votes
3
answers
13k
views
How can I compile and run my C code from within Emacs like I would with the terminal?
I recently moved from Code::Blocks to Emacs to write C code.
The one thing I don't like (because it takes too much time and effort for a simple and repetitive task) is the fact that I can't compile/...
- 131
1
vote
0
answers
269
views
Is this a c-default-style? If not, how can i configure it?
I've just started using spacemacs and the docstrings for cc-styles are a bit daunting. I've also just started working on a new project in c, and would like to keep consistent with existing style:
...
- 111
1
vote
1
answer
381
views
How to find where a given function is called from in gtags
I am using gtags and can jump to where a function is defined. Howeve I am not able to find inside a function where it is begin called from. Is there anyway to find where a function is called from?
- 11