c99 and popen()

[Fredrik Svensson]

I just tried to compile a program that has popen() and pclose() in it,
with -std=c99 in gcc. And it returns that it is an implicit declaration of
function popen, so it's probably not in the stdio.h include which it is
from c90. How do I get popen() in c99?

/Fredrik

 

[P.J. Plauger]

I just tried to compile a program that has popen() and pclose() in it,
with -std=c99 in gcc. And it returns that it is an implicit declaration of
function popen, so it's probably not in the stdio.h include which it is
from c90. How do I get popen() in c99?

It's a Posix function. Inspect that header to see if there's some
macro you have to define to enable the declaration of popen.
Otherwise, you're probably out of luck.

P.J. Plauger
Dinkumware, Ltd.
http://www.dinkumware.com

 

[Flash Gordon]

I just tried to compile a program that has popen() and pclose() in it,
with -std=c99 in gcc. And it returns that it is an implicit declaration
of function popen, so it's probably not in the stdio.h include which it
is from c90. How do I get popen() in c99?

popen and pclose are not part of standard C so if you want to use them
you need to do some implementation specific magic. comp.unix.programmer
might be a good place to ask.

 

[those who know me have no need of my name]

in comp.lang.c i read:

It's a Posix function. Inspect that header to see if there's some
macro you have to define to enable the declaration of popen.

even better, follow the posix guidelines for enabling features. which you
can discuss with other posix/unix-ish programmers in comp.unix.programmer.