Unknown type name ‘off64_t’

Question

I have a problem using Apache Portable Runtime on Ubuntu with GCC 4.8.1

The problem is that the off64_t from is not availab

Answer 1

You should define $C_INCLUDE_PATH to point to linux headers, something like

export C_INCLUDE_PATH=/usr/include/x86_64-linux-gnu

To install linux header, use

sudo apt-get install linux-headers-`uname -r`

P.S.

$ cat 1.c
#include 
off64_t a_variable;
int main(){return 0;}

$ gcc --version
gcc (Ubuntu/Linaro 4.8.1-10ubuntu9) 4.8.1

$ echo $C_INCLUDE_PATH
/usr/include/x86_64-linux-gnu

$ grep off64_t /usr/include/x86_64-linux-gnu/sys/types.h 
typedef __off64_t off_t;
#if defined __USE_LARGEFILE64 && !defined __off64_t_defined
typedef __off64_t off64_t;
# define __off64_t_defined