Re: [PATCH 2/2] libada: Respect `--enable-version-specific-runtime-libs'

["Maciej W. Rozycki" <macro at wdc dot com>]

On Thu, 26 Sep 2019, Arnaud Charlet wrote:

> > Respect the `--enable-version-specific-runtime-libs' configuration 
> > option in libada/, so that shared gnatlib libraries will be installed 
> > in non-version-specific $(toolexeclibdir) if requested.  In a 
> > cross-compilation environment this helps setting up a consistent 
> > sysroot, which can then be shared between the host and the target 
> > system.
> > 
> > Update the settings of $(toolexecdir) and $(toolexeclibdir), unused till 
> > now, to keep the current arrangement in the version-specific case and 
> > make the new option to be enabled by default, unlike with the other 
> > target libraries, so as to keep existing people's build infrastructure 
> > unaffected.
> 
> Can you clarify what will be the value of ADA_RTL_OBJ_DIR and ADA_RTL_DSO_DIR
> in the following cases:
> 
> - no version-specific-runtime-libs configure switch at all (default)

ADA_RTL_OBJ_DIR=$(libsubdir)/adalib
ADA_RTL_DSO_DIR=$(libdir)/gcc/$(target_noncanonical)/$(version)$(MULTISUBDIR)/adalib

e.g. (no multilibs):

ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/x86_64-linux-gnu/10.0.0/adalib
ADA_RTL_DSO_DIR=$(prefix)/lib/gcc/x86_64-linux-gnu/10.0.0/adalib

or (with multilibs):

ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32/adalib
ADA_RTL_DSO_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32/adalib
ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32d/adalib
ADA_RTL_DSO_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32d/adalib
ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib64/lp64/adalib
ADA_RTL_DSO_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib64/lp64/adalib
[...]

> - use of --enable-version-specific-runtime-libs

Same as above.

> - use of --disable-version-specific-runtime-libs

ADA_RTL_OBJ_DIR=$(libsubdir)/adalib

ADA_RTL_DSO_DIR varies in Makefile as the multilib part is now set by 
`configure' as with other target libraries, so with `x86_64-linux-gnu' 
(native) I have:

ADA_RTL_DSO_DIR=$(libdir)/../lib64

and with `riscv64-linux-gnu' (cross) I have e.g.:

ADA_RTL_DSO_DIR=$(exec_prefix)/$(target_alias)/lib/../lib64/lp64d

and then specifically (no multilibs):

ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/x86_64-linux-gnu/10.0.0/adalib
ADA_RTL_DSO_DIR=$(prefix)/lib64

or (with multilibs):

ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32/adalib
ADA_RTL_DSO_DIR=$(prefix)/riscv64-linux-gnu/lib32/ilp32
ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib32/ilp32d/adalib
ADA_RTL_DSO_DIR=$(prefix)/riscv64-linux-gnu/lib32/ilp32d
ADA_RTL_OBJ_DIR=$(prefix)/lib/gcc/riscv64-linux-gnu/10.0.0/lib64/lp64/adalib
ADA_RTL_DSO_DIR=$(prefix)/riscv64-linux-gnu/lib64/lp64
[...]

Notice that ADA_RTL_OBJ_DIR never changes with/without the use of this 
configuration option (as expected).

 Does it answer your question?

  Maciej