Including C header file with lots of global variables

Posted by Costi on Stack Overflow See other posts from Stack Overflow or by Costi
Published on 2010-05-19T19:18:19Z Indexed on 2010/05/19 19:20 UTC
Read the original article Hit count: 256

Filed under:

c

|

gcc

I have an include file with 100+ global variables. It's being used in a library, but some programs that I'm linking the lib to also need to access the globals.

The way it was built:

// In one library .c file
#define Extern

// In the programs that use the globals
#define Extern extern

// In the .h file
Extern int a,b,c;

I had a hard time understanding why the original programmer did that so I removed that define Extern stuff. Now I think I understand the thing about TU with the help of stackoverflow: 1, 2, 3.

Now I understand that I should define the global variables in one .c file in the library and use extern in the .h file. The problem is that I don't want to duplicate code.

Should I go back to that #define Extern voodoo?

Related posts about gcc

alias gcc='gcc -fpermissive' or modifying ./configure script

as seen on Super User - Search for 'Super User'
I am compiling quite big project from source. The compilation always ends with: error: invalid conversion from ‘const char*’ to ‘char*’ [-fpermissive] I have already compiled this project one year ago. So I know a solution to this. Actualy I found more solutions: Adding a typecast to appropriate… >>> More
Changes in gcc/persistence of optimization flags gcc/C

as seen on Stack Overflow - Search for 'Stack Overflow'
Just curious. Using gcc/gdb under Ubuntu 9.10. Reading a C book that also often gives the disassembly of the object file. When reading in January, my disassembly looks a lot like the book's; now, it's quite different - possibly more optimized (I notice some re-arrangements in the assembly code now… >>> More
gcc 4.5 installation problem under ubuntu

as seen on Stack Overflow - Search for 'Stack Overflow'
I tried to install gcc 4.5 on ubuntu 10.04 but failed. Here is a compile error that I don't know how to solve. Is there anyone successfully install the latest gcc on ubuntu? Following is my steps and the error message, I'd like to know where is the problem.... Step1: download these files: gcc-core-4… >>> More
not able to use g++ from Fedora

as seen on Stack Overflow - Search for 'Stack Overflow'
$ yum list | grep gcc arm-gp2x-linux-gcc.i686 4.1.2-11.fc12 @fedora arm-gp2x-linux-gcc-c++.i686 4.1.2-11.fc12 @fedora gcc.i686 4.4.3-4.fc12 @updates libgcc.i686 … >>> More
Yesterday's broken codebase hunt me back

as seen on Stack Overflow - Search for 'Stack Overflow'
I need a fun oky. I just love this openmoko hardware and hacking into it. Please could somebody help me to compile qemu.I 'm so sad and I want to compile qemu and it required the GCC3.x and then I downloaded gcc 3.2 but when I configure it and build it, it gives a very sad error message. G_FOR_TARGET="… >>> More

Developer IT

Including C header file with lots of global variables - Developer IT

Including C header file with lots of global variables

c

gcc

Related posts about c

Related posts about gcc

alias gcc='gcc -fpermissive' or modifying ./configure script

Changes in gcc/persistence of optimization flags gcc/C

gcc 4.5 installation problem under ubuntu

not able to use g++ from Fedora

Yesterday's broken codebase hunt me back

Categories cloud