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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-lib/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 | |
| | | |
| +--- adainclude <---+
| | |
| +--- adalib <----+
|
+--- rts-sjlj
|
+--- adainclude
|
+--- adalib
If the rts-sjlj library is to be selected on a permanent basis, these soft links can be modified 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.
Selecting another run-time library temporarily can be achieved by the regular mechanism for GNAT object or source path selection:
$ ADA_INCLUDE_PATH=$target/rts-sjlj/adainclude:$ADA_INCLUDE_PATH
$ ADA_OBJECTS_PATH=$target/rts-sjlj/adalib:$ADA_OBJECTS_PATH
$ export ADA_INCLUDE_PATH ADA_OBJECTS_PATH