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How to include header files in GCC search path?
(3 answers)
Closed 1 year ago.
I am attempting to compile a program file named MM.c. However, I continue to get the error message "microtime.h: No such file or directory". Even though clearly you can see in the image that the microtime.h file is in the same directory.
You're using <> to delimit the name of the header file. That tells the preprocessor to look only in system include directories or those specified by the -I option.
Application header files should be delimited with double quotes instead.
#include "microtime.h"
Related
This question already has an answer here:
How do I save preprocessor output using the Dev-C++ IDE?
(1 answer)
Closed 2 years ago.
There are several steps involved from the stage of writing a C program to the stage of getting it executed.
when I compile the code I only get an .exe file. But I want to get all the files which are being made before the compilation (preprocess ones), an intermediate code file
where all those macros with are replaced with their actual values and preprocessor are replaced with their actual header files.
in general can we get all those files (preprocess one, compile one and linker one) separately?
To access all the intermediate files use the command (Ubuntu):
gcc –Wall –save-temps filename.c –o filename. This command generates all the intermediate files in current working directory.
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What's an object file in C?
(5 answers)
Closed 3 years ago.
I'm a beginner in programming, I wonder what is inside the .o files and want to see it, but can't open the files in windows because they give some output with unrecognized symbols. Please suggest something !
They are object files, produced by the compiler, which the linker will combine into an executable.
They are not intended to be human readable.
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What mean file with extension "h.in"?
(3 answers)
Closed 8 years ago.
I was compiling with gcc on Linux
Because sndfile.h was not there but sndfile.h.in was found, I just tried with sndfile.h.in - which is in the same directory as the *.C file.
But I got the error even though it is in the same directory. Its been a while since I programmed in Linux that these little things are bothering me - appreciate if u could help me started. Thanks
I think you are using the angular brackets for the including the file.If you place < >. It will search in /usr/include. You have to use the double quotes for including the file in the current directory. And be sure that file is available.
Like this.
#include "sndfile.h.in"
This question already has answers here:
What is the difference between #include <filename> and #include "filename"?
(30 answers)
Difference between angle bracket < > and double quotes " " while including header files in C++? [duplicate]
(2 answers)
Closed 9 years ago.
I would like an explanation of the difference between < header.h > and "header.h" in library #include directives. How exactly (in which locations) does the linker search for the files? In what order does it perform the search?
When we write <stdio.h> , we are referring to a header file which is available in the include directory of the system. When we write #include <stdio.h>, the preprocessor searches for the header file in the system include directory and not in the current directory. When we write #include "stdio.h", the preprocessor starts searching for this header file in the current directory and then in its parent directories. So if we write our own stdio.h, save it in the current directory, and include it in the program using #include "stdio.h" then our header will be included instead of the system header.
In short, if we use angular brackets (<>) then we are indicating that the file can be found in one if the standard directories in the
system. If we use quotation marks (" ") then we are indicating that a non-standard header is being used.
This question already has answers here:
Closed 10 years ago.
Possible Duplicate:
What is the difference between #include <filename> and #include “filename”?
I just got involved into a project.
When I were tracing the project code, I found that
some people can include a header file by this way:
include < XXX.h >
XXX.h is a header file that is not in system libraries and made by our own programmers...
My question is how to use '<' and '>' instead of double " ?
and how to include headers in other directories by this way?
for example:
headers/header_a.h
headers/header_b.h
I can use include < header_a.h > and < header_b.h >...
should I use Makefile to implement this? thanks..
A file in double-quotes is referenced relative to the current directory:
#include "../file.h" // file from parent directory
You'd generally use this for your own headers.
A file in angle-brackets is referenced relative to the paths specified to the compiler:
#include <sys/bits.h> // file under, e.g., /usr/include
#include <thirdpartytools/somelib.h> // file under /path/to/third/party/includes
You'd generally use this for system or perhaps third-party headers, assuming the compiler is invoked with something like
gcc -I/usr/include -I/path/to/third/party/includes ...
The <> usually denotes System headers and the "" usually denote header files in the current directory (usually your header files). Source/Reference here for more info:
Difference between angle bracket < > and double quotes " " while including header files in C++?