6 minutes later … done !
And …
$./synfigstudio ".... appears to have terminated successfully"

Why i get there ?
i started reading this theard about karmic compil, and then jump to wiki page because for me a page is more suggest to have global/generic information… and forum last update, as karmic is quite old , i rejected the post and follow autobuild method/// brief explication : i don’t read full
Note with that extra work to get this very expected 6 minutes :
has i was with some already done things ;;… error error error … can’t create ;configure log . so i suppress then by hand … then done a “sudo chmod -R ug=rwX,o-rwx” cause without sudo was wrong on some files… then i needed to run sudo sh build.sh cause right management issues.
thank"s a bold genete … one shot resolution 
IDE Anjuta : So … hummm … has i saw behing Zelgadis shoulders, Anjuta can be an IDE choice, ok, got it … Projects (from sources .prj files) open nicely , with Makefile backend .
Any recommendation ?
"Always need to use the build scripts to rebuild the code once modified. " from and so no possible to trace/debug ?
code:)ya!