1. Making your own shared libraries
Here's an example of how you can write your
own C routines and add them to your Linux Euphoria
program. Making a shared library with gcc
isn't well documented, but is actually very simple.
1. Create a C source file, say, mylib.c
and define one or more C functions :
int sum(int x)
{
int i, sum;
sum = 0;
for (i = 1; i <= x; i++)
sum += i;
return sum;
}
2. Create a Euphoria program, mylib.exu:
include dll.e
atom mylib
integer sum
mylib = open_dll("./mylib.so")
if mylib = NULL then
puts(2, "Couldn't open mylib.so\n")
abort(1)
end if
sum = define_c_func(mylib, "sum", {C_INT}, C_INT)
? c_func(sum, {10}) -- calls your C routine
3. Make a shared library from your C source file:
gcc -shared mylib.c -o mylib.so
4. Run your Euphoria program:
exu mylib
The output is: 55
- the sum of the integers from 1 to 10.
Regards,
Rob Craig
Rapid Deployment Software
http://members.aol.com/FilesEu/
2. Re: Making your own shared libraries
- Posted by JJProg at CYBERBURY.NET
Jul 18, 1999
EU>Here's an example of how you can write your
EU>own C routines and add them to your Linux Euphoria
EU>program. Making a shared library with gcc
EU>isn't well documented, but is actually very simple.
EU>1. Create a C source file, say, mylib.c
EU>and define one or more C functions :
EU>2. Create a Euphoria program, mylib.exu:
EU>3. Make a shared library from your C source file:
EU>gcc -shared mylib.c -o mylib.so
EU>4. Run your Euphoria program:
EU>exu mylib
EU>Regards,
EU> Rob Craig
EU> Rapid Deployment Software
EU> http://members.aol.com/FilesEu/
Are you going to add this to Euphoria for DOS at some point? I think
DJGPP supports the same kind of thing since it's a port of GCC, though I
haven't looked into it.
Jeffrey Fielding
JJProg at cyberbury.net
http://members.tripod.com/~JJProg/
3. Re: Making your own shared libraries
Jeffrey Fielding writes (regarding dynamic linking):
> Are you going to add this to Euphoria for DOS at
> some point? I think DJGPP supports the same kind
> of thing since it's a port of GCC, though I haven't looked
> into it.
I don't think dynamic linking is well supported by DJGPP.
There may be a few crude "hacks" around, but
nothing solid. I wouldn't switch from WATCOM to DJGPP
just for that.
Regards,
Rob Craig
Rapid Deployment Software
http://members.aol.com/FilesEu/
