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.

Filter by
Sorted by
Tagged with
2
votes
2answers
160 views

Automatically insert a space in some C expressions

The corporate rules about indention forces us to surround our if conditions with spaces like this (in a C and C++ codebase) : if (<space>foo == bar<space>) { } Is there any emacs tool ...
1
vote
0answers
109 views

Doxygen style for c-doc-comment-style? [duplicate]

The option c-doc-comment-style supports javadoc, autodoc and gtkdoc. Is there a way to get doxygen support? (\returns, \note, \brief... etc)
2
votes
0answers
102 views

How to modify behavior of syntax highlighting without editing the original source?

There is a bug in C/C++ comment highlighting (bug 11865) Where the fix appears to be to modify the value of c-font-lock-doc-comments Is there a way to do this in my emacs config, instead of having ...
0
votes
1answer
440 views

How to toggle multi-line comment blocks?

Is it possible to configure multi-line comments to comment/uncomment selected text? For example C/C++'s preprocessor could be toggled like this. eg: Before: // a comment Some(code); /* ...
5
votes
2answers
2k views

How to use C++ comments “//” in c-mode?

In c-mode comment-region is adding /* */ style comments. Is there a way to default to using C++ style // prefix in C source files instead?
0
votes
1answer
706 views

Stuck at input emacs gdb debugging C program /* enter doesn't end text input */

Hello I am novice programmer and I am trying to debug a simple C program, using getline (from the K&R book at the beginning) - input ends on newline. I have a problem with gdb on Emacs. When I ...
0
votes
1answer
85 views

Linking Multiple Implementation Files in C on Emacs

I need help with linking multiple c source code files on emacs. Could anyone show me the way on how to work this out? Thanks!
1
vote
0answers
140 views

Structures are defined using a macro, flycheck gives errors

In our source code we surround structures with a macro (MKDIFF) that serves as a flag for the Makefile system. It does not expand into anything, just a flag. Flycheck (understandably) flags these ...
2
votes
1answer
906 views

Gray-out preprocessor conditionals

Is there a package that will gray out or hide the false portion of a c preprocessor macro? #define ENABLE 1 #if ENABLE bool hide = false; #else bool hide = true; #endif In the above example, ...
4
votes
3answers
3k views

Syntax highlight doxygen comments in C/C++? (c-doc-comment-style)

Is it possible to syntax highlight doxygen in C/C++ code? QtCreator and Vim both support basic highlighting so \param, \note... etc are highlighted differently.
0
votes
2answers
565 views

flycheck include path from ede

I have a setup where I use EDE from CEDET for C projects development (among other things) and the real good flycheck on-the-fly syntax checking. I have defined ede-cpp-root-project in my .emacs file ...
4
votes
1answer
1k views

C/C++ coding in Emacs org-mode's babel

I'm not finding a lot of examples/documentation for the non-REPL world of C/C++ in Emacs org-mode babel. For example, is there a way to break a program up into separate source code blocks, i.e., a ...
2
votes
1answer
724 views

Change C indent style for specific project?

I have in my ~/.emacs.d/init.el: (use-package google-c-style ;; provides the Google C/C++ coding style :ensure t :config (add-hook 'c-mode-common-hook 'google-set-c-style)) However, a ...
1
vote
0answers
126 views

Getting gdb to work for this project

For this project, I cannot seem to get M-x gdb to work in Emacs 25.1 (on Ubuntu 14.04.5 64-bit if it matters - this should be the case for any Ubuntu-based Linux in general I imagine). Steps to ...
1
vote
3answers
227 views

Emacs equivalent of the following vim operation

In the answer to a question on Quora, Gilles Castel wrote an answer highlighting the power of vim. The Question was: How would you write a C program to print 1 to 100 without loop, recursion, or ...
0
votes
1answer
1k views

Compilation exiting abnormally with code 1 only when inside Emacs + liking to pthread library

Only when I'm trying to compile + link to the pthread library, I'm getting this error from Emacs: -*- mode: compilation; default-directory: "~/GITHUB/kandr/" -*- Compilation started at Mon Nov 14 02:...
1
vote
0answers
973 views

Why do “gnu” and “linux” `c-default-style` treat `c-basic-offset` differently?

These lines in my .emacs (setq-default indent-tabs-mode nil) (setq-default c-default-style "linux") (setq-default c-basic-offset 4) result in the following formatting of my c code (the c-basic-...
1
vote
0answers
160 views

Smarter compile in emacs

I often got to work with projects organized as follows: src/ include/ ... Makefile Is there a way to teach emacs' "compile" function to always use that top-level Makefile regardless which file I'...
0
votes
0answers
551 views

c/c++ disassembler for emacs and objdump

I'm trying to show assembly under the cursor in emacs (spacemacs, on mac os x) and although disaster.el does generate assembly with objdump, it fails to associate lines in source with lines in ...
3
votes
0answers
90 views

Working around preprocessor blocks

I am trying to navigate a C project that has lots of preprocessor directives like this: #ifdef SOME_COMPILE_TIME_VARIABLE for ( idx=0; idx<FOO; idx++ ) { #else for ( idx=0; idx<BAR; idx+...
5
votes
1answer
2k views

C brace indentation

I am new to Emacs and trying to learn the basics. I am writing a few C programs and I noticed that the default brace indentation is as follows: for(i = 0; i < 10; ++i) { // code }...
0
votes
1answer
2k views

auto-complete-c-headers just works with C. No result with C++

I installed the auto-complete-c-headers package and added the following in my Emacs configuration file ; start auto-complete with emacs (require 'auto-complete) ; do default config for auto-complete (...
1
vote
1answer
1k views

Completion for variables in C using company-gtags, or not Semantic

I have a working C IDE without Semantic (too slow for me), from instructions here, with completion provided by company-gtags (I think. Maybe clang does something too?). Completion at point works for ...
1
vote
0answers
469 views

Code completion for C++

I have just started using emacs, after coming from using Xcode. I would like to get code completion for C++, however there are a whole bunch of things that don't really explain what they do (at least ...
2
votes
1answer
9k views

Auto-complete C/C++ functions

I want code completion for C/C++ functions and variables from headers. I tried to install Auto-complete and Company, but C/C ++ functions/variables aren't complemented. Here is the relevant portion ...
3
votes
1answer
3k views

Emacs does not contain package “package”

I want to add C auto-completion at least so that I can use Emacs on a regular basis as my C editor. I am new to Emacs, and I had already it installed in my system, because it came with the OS (I think)...
5
votes
2answers
119 views

Swap two statement on adjacent lines in C when one statement takes multiple lines

Assume that I have the following code: int x; string s = "some very long " " string"; I would like to have one command that swaps the order of these without ending up with something like: ...
7
votes
1answer
337 views

How can I build/package Emacs so that the C source files are installed to a standard find-function-C-source-directory?

I want to be able to view C source code of Emacs functions. For example, I want to be able to do M-: (find-function 'message). Emacs prompts me for directory the C sources, so it can set find-...
1
vote
0answers
25 views

How can I have C functions coloured based on whether they are defined?

Colleague of mine showed me a cool feature of gnome-builder which does colour symbols based on whether they are defined or not and I was wondering whether it is possible in Emacs as well. And by that ...
2
votes
1answer
564 views

How to make an alias in eshell

I want to make an alias in eshell so that when I type gcc it actually does gcc -Wall -pedantic -std=c99 but when I make the alias, it just displays gcc -Wall -pedantic -std=c99 and doesn't actually ...
1
vote
2answers
2k views

How to set up hotkey for compiling c code and run the compiled file?

I used to use tmux with vim to write codes in C/C++. So I split the screen into two in tmux and then press F3 to "make" the file. And then I can press F4 to run the "main" file in the next subscreen. ...
6
votes
3answers
5k views

Better syntax-higlighting for member variables and function calls in cpp-mode

In atom, C++ files are well colored unlike emacs cpp-mode. Emacs does not highlight references to member variables, function calls or member functions. They all are uncolored. The left is from emacs ...
0
votes
0answers
96 views

How to add a key map in Emacs source code?

I found ESC-prefix and Control-X-prefix defined in keymap.c: initial_define_key (global_map, 033, "ESC-prefix"); initial_define_key (global_map, Ctl ('X'), "Control-X-prefix"); But no matter what ...
6
votes
2answers
186 views

How to add a new .c file to Emacs source code

I've added my own .c file to Emacs /src directory as well as the following lines emacs.o: ... file.c file.h file.o: file.c in deps.mk I get file.o generated, but it is not linked when generating ...
11
votes
2answers
5k views

How to get semantic syntax highlighting on emacs for C/C++ code

I'm new to emacs and programming in general so please bear with me. I'm trying to use emacs as my C/C++ IDE, and I noticed that in CC mode the variables/functions seemed to be highlighted only during ...
19
votes
1answer
3k views

How to automatically create neat C comment blocks while typing?

Some code editors such as eclipse automatically form neat blocks when you start typing a multi-line comment: Is there some package or another way to do this in emacs too? Edit: To clarify: I do not ...
0
votes
0answers
88 views

Make Helm Projectile to show external sources

I'm pretty new to emacs (was using Vim), primarily using it for Ruby on Rails projects. At my free time, I like to write some C code for STM32 micro-controllers. Unlike RoR project, C project for ...
2
votes
2answers
296 views

Does your project use Elisp for build automation?

I'm building a new appliance, linking BusyBox with Tor on top of a minimal GNU/Linux operating system. I'd like to try something different for the automated build infrastructure with this one and ...
0
votes
1answer
862 views

Emacs GDB does not load shared library symbols

I am trying to debug a C/MPI library that I have built. All objects are compiled using GCC and -ggdb, they are also linked using -ggdb. When I try to attach a gdb session to the process with the -p ...
1
vote
1answer
684 views

Emacs (semantic) include not working for relative personal includes

This works: Running semantic-decoration-include-visit (opens the included header): #include <string.h> #include "/usr/include/gtk-3.0/gtk/gtk.h" Works well. This does not: But if I ...
0
votes
0answers
550 views

Wrong indent in c-mode and c++-mode

In my coding style tabs used to indent and spaces for align. I've configure Emacs for this, but some times emacs places 4 spaces instead of tabulation in some blocks of code. If can be fixed by ...
1
vote
1answer
573 views

How to indent C correctly

I've read several answers on here and on Google and have tried several solutions but nothing is fixing this for me. Right now, if I try to write C code Emacs indents it like so: #include <stdio....
3
votes
0answers
157 views

Turn C Electric Indentation off only for specific characters

Extending Customizing c-mode indentation behavior in emacs-24.4 How can electric indentation be disabled for other specific keys without disabling the entire mode? Specifically, how can electric ...
1
vote
2answers
794 views

How to display type of C variable in a curses type menu?

A friend of mine who uses vim had this useful feature enabled, that allowed him to see type/completion information in a dropdown window even in terminal mode. Currently in emacs I have to actually ...
5
votes
2answers
5k views

emacs cscope integration basics

I am a long term eclipse CDT user migrating to emacs (ver. 23.3.1), because I have to work on a large C codebase accessible only through a telnet/ssh shell. After going through several online guides, ...
11
votes
3answers
2k views

How can I automatically insert a prototype in foo.h from foo.c?

Suppose I'm writing a C program in a file foo.c: int add_numbers(int x, int y, int z) { // Very complex implementation here. return x + y + z; } I want a command that will insert a ...
7
votes
2answers
868 views

Hook that indicates when the cursor has been moved by scrolling

Inspired by this question: Let Emacs move the cursor off-screen, I am considering writing a minor mode that will keep the cursor in a fixed position that is not affected by scrolling operations. I ...
1
vote
2answers
1k views

Why does hook to set up C++ mode indentation not work?

This is my code (defun my/set-c-mode () (local-set-key (kbd "C-c C-c") 'compile) (setq compilation-finish-function 'compilation-exit-autoclose-clone) (setq c-default-style "linux") (setq c-indent-...
7
votes
4answers
556 views

How do I disable ffap (find file at point) when the first two non-space characters in a line are '//'?

In Verilog/C/C++, comments can begin with //. Here's an example comment, //This is a comment I like to use the find-file-at-point feature. If my cursor is on the file name in `include "some_file.v"....

1
2