Top "Libc" questions

How to write my own printf() in C?

Actually I am trying to write my own printf() in C by using varags. But I am not getting the …

c libc

gcc: why is the -lm flag needed to link the math library?

If I include <stdlib.h> or <stdio.h> in a C program I don't have to …

gcc libc

Compiling without libc

I want to compile my C-code without the (g)libc. How can I deactivate it and which functions depend on …

c gcc glibc demo libc

fgets() function in C

I know everybody has told me to use fgets and not gets because of buffer overflow. However, I am a …

c stdin fgets libc

Linking against an old version of libc to provide greater application coverage

Linux binaries are usually dynamically linked to the core system library (libc). This keeps the memory footprint of the binary …

linux linker libc

Undefined reference to `clock_gettime` although `-lrt` is given

I've give -lrt as the last linker flag to the compiler. But still getting this error. arif@khost:~/sak/sak.…

linux linker libc

How to sleep for a few microseconds

Consider the following code: #include <stdio.h> #include <time.h> #include <math.h> // Compile …

c linux real-time glibc libc

Where is ptrdiff_t defined in C?

Where is ptrdiff_t defined in C?

c types libc stdint

GLIBC_2.7 not found

I am getting the following error when trying to run several executables: /lib/libc.so.6: version `GLIBC_2.7' not found (…

centos glibc libc

What is the rationale for fread/fwrite taking size and count as arguments?

We had a discussion here at work regarding why fread and fwrite take a size per member and count and …

c libc