Code::Blocks Forums

I'm new to Code::Blocks, until now I've written C programs in gedit and compiled with gcc on CLI.
When I compile with:
clang example.c -o example
I get an ~8kb file, and when I run "file example" I get:
example: ELF 64-bit LSB  executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.24, BuildID[sha1]=f777e63be4eb01a07e3dea7e1b7adfff47150ded, not stripped


But when I build in C::B I get a 2kb file called example.o. When I file it I get:
example.o: ELF 64-bit LSB  relocatable, x86-64, version 1 (SYSV), not stripped

I've looked inside Settings --> Compiler and everything looks normal to me there. It's set to GCC, clang isn't an option as far as I can see.

When I attempt to run example.o from C::B I get permission denied. Then after changing the permissions I get "cannot execute binary file: Exec format error"

Any suggestions? Thanks.

Hello! I am also a novice, in fact.
I can not exactly understand .. But anyway, IDE makes it easy to compile the program by clicking on and build the desired item in the drop-down list. The finer settings - for which a more complex, not simple tasks.
Happy New year to you!! With a joyful holiday !! :)

Thanks, it doesn't throw any errors when I hit build, but something is definitely wrong with the output file.

gcc -Wextra -Wall -std=c99  -c /home/user/Dropbox/code/example/example.c -o /home/user/Dropbox/code/example/example.o
g++  -o /home/user/Dropbox/code/example/example /home/user/Dropbox/code/example/example.o   
Process terminated with status 0 (0 minute(s), 0 second(s))
0 error(s), 0 warning(s) (0 minute(s), 0 second(s))

When I compile the same source file in Eclipse CDT, it compiles and works normally, though it makes the file about 5 times as big as clang/gcc do... So it seems to me that I've missed something with CB in terms of configuration.

You do know that the "example" file and the "example.o" files are two different files, right?

You SHOULD NOT try to run the "example.o" file.

Tim S.

Hi Tim,
Thanks, I feel like an idiot. Build was outputting both "example" and "example.o".  I assumed that example.o was the output of the build and that example was what I'd already output from the CLI. I deleted both and hit build again, and it output both.

Can you tell me what example.o is?

Quote from: turqoisehex on January 01, 2016, 08:48:53 PMCan you tell me what example.o is?

Dot "o" files are "object files": https://en.wikipedia.org/wiki/Object_file

Which are an intermediate step towards an executable file.

Thanks for that. I made the assumption that .o would be shorthand for .out as in a.out, my mistake. Thanks again.

Right on, you're welcome.  :)