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.

That will not work.

FPC has a copy of the environment, which it received on startup. It makes little or no sense to add strings to this, since it is for internal use only.

If you want to execute another program with a different set of environment strings, you must use the execve call to specify a different set of environment variables.

The TProcess component allows you to easily specify the environment as a TStringList.

Michael.

FYI, see
http://alain.vitry.free.fr/en/devel/devel-pascal.php

If you're using a command line to execute a foreign program you can always tell the shell:

csh: "setenv VAR value; your-foreign-program"
sh: "VAR=value; your-foreign-program"

Not portable, ugly workaround, but it does do the job.

HTH,
Marc

It sounds to me like you just want a global
variable, not an environment variable.

Maybe something like this?

(************************************)
program sdlver;
uses libc;
type
SDL_version = record
major : byte;
minor : byte;
patch : byte;
end;
pSDL_version = ^SDL_version;
function SDL_Linked_Version:pSDL_version; cdecl; external 'SDL';
var
SDL_VER:array[0..15] of char;
begin
with SDL_Linked_Version^ do sprintf(SDL_VER, '%d.%d.%d', [major, minor,
patch]);
WriteLn(SDL_VER);
end.
(************************************)

Regards,
- Jeff

Thanks, is the only think that I probe and runs ok!!!

****
program shell2;
uses baseunix, sysutils;
begin
    writeln('glx-config Version:',fpGetenv('SDL_VER'));
end.
****

export SDL_VER=`sdl-config --version`; ./shell2
glx-config Version:1.2.8

Note. I have put the clause EXPORT because I'm using bash.

I don't probe tu use the other method that other person has posted than use a call to glibc, perhaps it's the largest walk.

Another one, has mentioned than FreePascal(FP) gives an enviroment in read-only, I have read that the environ is an array of list of var's with values, and I'dont know why FP (I love it) cannot write in this array, perhaps do not implement yet.

Thank's eveybody, and regards.

Thank's for the page

Thank's for the response, perhaps it's my arch ( amd64 ) and compiler 2.0.0, but when I execute this code say :

./sdlver
1.5426178.-248

if I execute `$sdl-config --version` output is not the same :( 1.2.8