The adainclude subdirectory containing the sources of the GNAT
run-time library and the adalib subdirectory containing the
ALI files and the static and/or shared GNAT library are located
in the gcc target-dependent area:
target=$prefix/lib/gcc/gcc-*dumpmachine*/gcc-*dumpversion*/
As indicated above, on some platforms, several run-time libraries are supplied. These libraries are installed in the target dependent area and contain a complete source and binary subdirectory. The detailed description below explains the differences between the different libraries in terms of their thread support.
The default run-time library (when GNAT is installed) is ‘rts-native’. This default run-time is selected by the means of soft links. For example on x86-linux:
$(target-dir)
__/ / \ \___
_______/ / \ \_________________
/ / \ \
/ / \ \
ADAINCLUDE ADALIB rts-native rts-sjlj
: : / \ / \
: : / \ / \
: : / \ / \
: : / \ / \
+-------------> adainclude adalib adainclude adalib
: ^
: :
+---------------------+
Run-Time Library Directory Structure
(Upper-case names and dotted/dashed arrows represent soft links)
If you want to select the ‘rts-sjlj’ library on a permanent basis, you can modify these soft links with the following commands:
$ cd $target $ rm -f adainclude adalib $ ln -s rts-sjlj/adainclude adainclude $ ln -s rts-sjlj/adalib adalib
Alternatively, you can specify rts-sjlj/adainclude in the file
$target/ada_source_path and rts-sjlj/adalib in
$target/ada_object_path.
You can select another run-time library temporarily
by using the --RTS switch, e.g., --RTS=sjlj