The problem I encountered in using GCC is that I cannot use the command make to build my program because some files contain the paths of their actual location.
Say I have a file named "machine.h", its content is target-pisa/pisa.h. At the same time, in the same working directory, I have a folder named "target-pisa", in which there is a file named "pisa.h"; the actual code of the header file "machine.h" is actually inside the file "pisa.h", which is inside the folder named "target-pisa" located in the same working directory as "machine.h".
Assume for some reason I cannot simply copy and paste the code from "pisa.h" to "machine.h"; that is, I have to stick with what is provided by the prof. The make command does not work in this case in my laptop because it cannot interpret target-pisa/pisa.h as a directory path and open the actual header file "pisa.h" according to the path target-pisa/pisa.h provided in the file "machine.h". Instead, git bash interprets target-pisa/pisa.h as C code (if I am not mistaken); see the figure below.
Some additional info that may be helpful:
In machine.h, there is only one line of code as shown below:
target-pisa/pisa.h
I have checked that almost all .c files in the working directory have #include "machine.h".
How can I solve this problem? Please help, I have been stuck in this for a long time. By the way, my friend also used git bash to do this lab and this problem doesn't happen to him.
I tried to reinstall git bash in order to see if the problem can be solved, but it didn't.
All in all, I want to build the program successfully by using make command in git bash.
machine.h needs to have an #include directive to tell the compiler to pull in the nested header.
#include "target-pisa/pisa.h"
Just writing target-pisa/pisa.h by itself isn't valid C code.
Related
Preface: I am very new to c and CLion, so apologies in advance if my phrasing is very wrong.
Essentially, I have an assignment that involves two c files (a "main", and one performing a conversion between imperial and metric units). The main c file simply #include-s the conversion file, performs a function within the conversion file, and prints the resulting value to the user. Simple enough, but I keep getting a message every time I try to run it:
"undefined reference to 'conversion'"
I have tried to suss out the problem, and my only idea relates to the banner at the top of conversion.c which says "This file does not belong to any project target, code insight features may not work properly.". I do not understand why I receive this message, because conversion.c and main.c are both within the main project directory, and this setup worked perfectly fine in my previous assignment.
I have searched for solutions online, and the only one that seemed to make sense was to update my CMakeLists.txt file to include add_executable(project conversion.c). This is what my CMakeLists.txt file looks like before I add this line:
cmake_minimum_required(VERSION 3.12)
project(project C)
set(CMAKE_C_STANDARD 11)
add_executable(project main.c)
However, when I add it, I get the error:
CMake Error at CMakeLists.txt:7 (add_executable):
add_executable cannot create target "directory" because another
target with the same name already exists. The existing target is an
executable created in source directory
"/home/john_s/CLionProjects/project". See documentation for
policy CMP0002 for more details.
Presumably this is because the previous line I have (add_executable(project main.c)) is linking to the same directory, but I have no idea how to resolve this. Any suggestions?
From cmake manual:
add_executable(< name> [WIN32] [MACOSX_BUNDLE]
[EXCLUDE_FROM_ALL]
[source1] [source2 ...])
Adds an executable target called to be built from the source files listed in the command invocation. (The source files can be omitted here if they are added later using target_sources().)
So to combile a single executable using two source files, you just use:
add_executable(target_name source1.c source2.c)
I have a some code files and a directory with some header files in sub-directories, structured like this:
code\my_file.c
code2\other_file.c
headers
where headers contains the sub-directories openssl, curl.
When I use #include <openssl/evp.h> inside my_file.c it fails with:
fatal error: openssl/evp.h: No such file or directory
However, it works from other_file.c
Additionally, when I include the full path #include "../headers/openssl/evp.h it works fine.
Is there a reason one file in my project knows to find the openssl dir and the other doesn't?
Using Eclipse
I tried changing properties, by adding an include path:
but it didn't work...
This what fixed it for me but if someone has another answer, I'd love to hear it
So, it turns out I just needed to do the exact same thing in the GNU C++ tab also:
I am running the pc lint misra checks on my project.
When I execute the program the output is huge because it includes all the bsp files from arm. How do I get pc-lint to exclude a whole directory. In the code when I include a header file from outside the project I use <> instead of ""
i.e. #include <arm_driver.h>.
I thought this was enough. Is their another step missing?
These are the additional parameters I have passed
+libclass(angle, foreign)
-e686
-wlib(0)
And with the command vf I can see that all the external directory files are being treated as library headers.
Finally fixed the issue.
Comment out all the explicit +elib lines in the corresponding .lnt file.
i.e. replace all instances of +elib with //+elib
Please please help me, I am a computer illiterate female looking to convert a group of (.cng files) into jpegs. I found a source code on a blog that instructs me to
Build it, then run it with something like this:
cng2jpg /path/to/images/199x/1990101/*.cng
Here is a link to the source code
Does anyone know how I can run the source code to convert the files?
Here is a link to the blog post for reference for what exactly I am doing
First, put the source code into a file named cng2jpg.c. Then open a terminal, navigate with cd into the directory where you placed that file and type
cc -o cng2jpg cng2jpg.c
This creates the program cng2jpg. You can execute it by typing
path/to/cng2jpg input_file.cng
where path/to/cng2jpg is the path where cng2jpg was generated in the previous step.
Vim is pretty smart when it comes to C, so if one inserts a bogus header file such as #include <stdioo.h>, it complains by bringing up a location list with the following error:
foo.c:1|20| fatal error: stdioo.h: No such file or directory
|| compilation terminated.
Which is great, but for whatever reason, I get the same error when including the <mpi.h> header file. I know this is a vim problem b/c I can compile and execute the program with mpicc and mpiexec, respectively. Besides it being extremely irritating having it pop up every time I save the file, all syntax errors are ignored when this happens.
Is there any way to instruct vim to ignore this header file, or at least all the header files?
WHERE on your filesystem is the <mpi.h> file located?
Often it's one level down, such as /usr/include/mpi/mpi.h and would require <mpi/mpi.h> to access it.
You may need to add another directory path to the -I option list of your compiler, or add the directory path to VIM's path option variable
:help 'path
Will get you started on the VIM side, you'll need to look up how to add options to your current setup, no idea if you're using cmake, make, visual something, netclipse or whatever.
But a simple 'locate mpi.h' would be the place to start, since you know it's there.
You said "pop-up" ... are you using syntastic or such? Again, finding the proper path would help there too. Evidently mpicc knows the proper path to the include files, you just need to tell VIM. (via the 'path' option)