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authormanuel <manuel@mausz.at>2020-03-17 12:00:59 +0100
committermanuel <manuel@mausz.at>2020-03-17 12:00:59 +0100
commitf0ecb4d38fff522c72905a8551355ca925381fa3 (patch)
tree44df19413a3ea38b2729f2ba223b9c3be5b27af3 /bs_button/include
parent1fe1e04f903aaedf4bcde0ae85f58f6644ccedd5 (diff)
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platform io cleanup
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1
2This directory is intended for project header files.
3
4A header file is a file containing C declarations and macro definitions
5to be shared between several project source files. You request the use of a
6header file in your project source file (C, C++, etc) located in `src` folder
7by including it, with the C preprocessing directive `#include'.
8
9```src/main.c
10
11#include "header.h"
12
13int main (void)
14{
15 ...
16}
17```
18
19Including a header file produces the same results as copying the header file
20into each source file that needs it. Such copying would be time-consuming
21and error-prone. With a header file, the related declarations appear
22in only one place. If they need to be changed, they can be changed in one
23place, and programs that include the header file will automatically use the
24new version when next recompiled. The header file eliminates the labor of
25finding and changing all the copies as well as the risk that a failure to
26find one copy will result in inconsistencies within a program.
27
28In C, the usual convention is to give header files names that end with `.h'.
29It is most portable to use only letters, digits, dashes, and underscores in
30header file names, and at most one dot.
31
32Read more about using header files in official GCC documentation:
33
34* Include Syntax
35* Include Operation
36* Once-Only Headers
37* Computed Includes
38
39https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html