[Bug ada/104856] New: Build gcc with a target not containing '-gnu' gets added to gnat target

[Bug ada/104856] New: Build gcc with a target not containing '-gnu' gets added to gnat target

[bib_aab at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

            Bug ID: 104856
           Summary: Build gcc with a target not containing '-gnu' gets
                    added to gnat target
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: ada
          Assignee: unassigned at gcc dot gnu.org
          Reporter: bib_aab at hotmail dot com
  Target Milestone: ---

Building the gcc suite with Ada with a target such as x86_64-suse-linux causes
Target_Name to be set to x86_64-suse-linux-gnu in s-oscons.ads.

Build gcc with:
../configure --prefix=/opt/gcc-11 --infodir=/opt/gcc-11/share/info
--mandir=/opt/gcc-11/share/man --libdir=/opt/gcc-11/usr/lib64
--libexecdir=/opt/gcc-11/usr/lib64
--enable-languages=c,c++,objc,fortran,obj-c++,ada,go,d
--enable-offload-targets=nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror
--with-gxx-include-dir=/opt/gcc-11/include/c++/11 --enable-ssp --disable-libssp
--disable-libvtv --enable-cet=auto --disable-libcc1 --disable-plugin
--with-bugurl=https://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-slibdir=/opt/gcc-11/lib64 --with-system-zlib
--enable-libstdcxx-allocator=new --disable-libstdcxx-pch --enable-libphobos
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-11 --without-system-libunwind --enable-multilib
--with-tune=generic --build=x86_64-suse-linux --host=x86_64-suse-linux

Running 'gcc -dumpmachine' returns x86_64-suse-linux. This is as per the
configure switches, so all well and good.

However:
eth5:~$ grep Target_Name
/opt/gcc-11/usr/lib64/gcc/x86_64-suse-linux/11/adainclude/s-oscons.ads
   Target_Name                   : constant String  := "x86_64-suse-linux-gnu";

For some reason -gnu has been added. This means it is near impossible to build
the gprbuild tools since it compares them and barfs because they are not the
same. And we cannot just edit that file, since it states 'make changes to
s-oscons-tmplt.c and rebuild the GNAT runtime library.'

Why on earth is it adding -gnu? If it's a good idea, why doesn't -dumpmachine
also return it?

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING
                 CC|                            |ebotcazou at gcc dot gnu.org
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2022-03-09

--- Comment #1 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
> Building the gcc suite with Ada with a target such as x86_64-suse-linux
> causes Target_Name to be set to x86_64-suse-linux-gnu in s-oscons.ads.

That's not what you're doing though since you do not pass --target, so try
adding --target=x86_64-suse-linux to the configure line.

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[schwab@linux-m68k.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

--- Comment #2 from Andreas Schwab <schwab@linux-m68k.org> ---
--target defaults to --host when not given (and --host defaults to --build when
not given).  Looks like something is using the canonical target name instead of
the target alias.

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[bib_aab at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

--- Comment #3 from Bib <bib_aab at hotmail dot com> ---
I tried rebuilding with:
../configure --prefix=/opt/gcc11a --enable-languages=c,c++,ada
--enable-offload-targets=nvptx-none, --without-cuda-driver
--enable-checking=release --disable-werror  --enable-ssp --disable-libssp
--disable-libvtv --disable-libcc1 --disable-plugin
--with-bugurl=https://bugs.opensuse.org/ --with-pkgversion='SUSE Linux'
--with-system-zlib --enable-libstdcxx-allocator=new --disable-libstdcxx-pch
--enable-version-specific-runtime-libs --with-gcc-major-version-only
--enable-linker-build-id --enable-linux-futex --enable-gnu-indirect-function
--program-suffix=-11 --without-system-libunwind --with-tune=generic
--build=x86_64-suse-linux --host=x86_64-suse-linux --target=x86_64-suse-linux
--disable-multilib

And it still happens:
big-iron:/home/src/build/gcc-11.2.0/build$ find /opt/gcc11a/ -name s-oscons.ads
-exec grep -Hi Target_Name {} \;
/opt/gcc11a/lib64/gcc/x86_64-suse-linux/11/adainclude/s-oscons.ads:  
Target_Name                   : constant String  := "x86_64-suse-linux-gnu";

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[bib_aab at hotmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

--- Comment #4 from Bib <bib_aab at hotmail dot com> ---
I have a bug raised with Suse:
https://bugzilla.suse.com/show_bug.cgi?id=1196861

And they are saying:
Hmpf, so the directory name and the -dumpmachine output is using the configured
target, while s-oscons.ads contains the canonicalized variant.  Gah!
Quick grepping on our binary packages indicates that that's the _only_ place
where
the canonical name is used, so maybe the best course of action would be to hack
on it long enough that the generated s-oscons.ads also just contains the
provided
name without canonicalization.

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
I've opened a duplicate with a patch explaining what happens: PR104861

[Bug ada/104856] Build gcc with a target not containing '-gnu' gets added to gnat target

[ebotcazou at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104856

Eric Botcazou <ebotcazou at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|---                         |DUPLICATE

--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---


*** This bug has been marked as a duplicate of bug 104861 ***