[fpc-pascal] set envirom variable with pascal in linux

[mondrillo]

Hello list, 

In Bach, Perl, can do set SDL_VER=`sdl-config --version`
and in enviroment has the variable SDL_VER=1.2.3 for example.
echo $SDL_VER
1.2.3
But in Pascal non have the setenv() procedure as in C :(

Actualy I resolve this problem with sending the output to a file, and
then reading the file. But, can I pass from C this function?, or call
a libc (thinks is this lib that has setenv() ) from Pascal to execute
setenv().

Thank's and regards.