Re: armflang: error: unknown argument: '-soname'

[Anthony Scemama]

Dear Anton,

here is a patch for libtool that Francois Coppens and I submitted to
libtool in February. I think we did something went wrong in the PR
process because it has still not been included... Maybe you can submit
it again to the libtool team, it is not a big change and it is quite
important for us too to have this patch included.

best,

Anthony


$ git diff 1ec8fa28dcb29500d485c136db28315671ec4c3b
diff --git a/m4/libtool.m4 b/m4/libtool.m4
index 79a2451e..df1a7860 100644
--- a/m4/libtool.m4
+++ b/m4/libtool.m4
@@ -4719,6 +4719,12 @@ m4_if([$1], [CXX], [
        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
        _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
         ;;
+      # ARM flang
+      armflang*)
+        _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'
+        _LT_TAGVAR(lt_prog_compiler_pic, $1)='-fPIC'
+        _LT_TAGVAR(lt_prog_compiler_static, $1)='-static'
+        ;;
       # Lahey Fortran 8.1.
       lf95*)
        _LT_TAGVAR(lt_prog_compiler_wl, $1)='-Wl,'





On Fri, 2023-10-20 at 10:47 +0000, Shterenlikht, Anton wrote:
> This seems like an automake issue, not libtool.
> 
> The libtool produced by running configure has:
> 
> 11661 # ### BEGIN LIBTOOL TAG CONFIG: FC
> 11662 
> 11663 # The linker used to build libraries.
> 11664 LD="<some path>/arm-compiler-for-linux_23.10_AmazonLinux-2/gcc-
> 12.2.0_AmazonLinux-2/aarch64-linux-gnu/bin/ld"
> 11665 
> 11666 # How to create reloadable object files.
> 11667 reload_flag=" -r"
> 11668 reload_cmds="\$LD\$reload_flag -o \$output\$reload_objs"
> 11669 
> 11670 # Commands used to build an old-style archive.
> 11671 old_archive_cmds="\$AR \$AR_FLAGS \$oldlib\$oldobjs~\$RANLIB
> \$tool_oldlib"
> 11672 
> 11673 # A language specific compiler.
> 11674 CC="armflang"
> 11675 
> 11676 # Is the compiler the GNU compiler?
> 11677 with_gcc=no
> 11678 
> 11679 # Compiler flag to turn off builtin functions.
> 11680 no_builtin_flag=""
> 11681 
> 11682 # Additional compiler flags for building library objects.
> 11683 pic_flag=""
> 11684 
> 11685 # How to pass a linker flag through the compiler.
> 11686 wl=""
> 
> Note that wl= is emtpy.
> 
> Compare with the portion of this file for C compiler:
> 
>   317 # A language specific compiler.
>   318 CC="mpicc"
>   319 
>   320 # Is the compiler the GNU compiler?
>   321 with_gcc=yes
>   322 
>   323 # Compiler flag to turn off builtin functions.
>   324 no_builtin_flag=" -fno-builtin -fno-rtti -fno-exceptions"
>   325 
>   326 # Additional compiler flags for building library objects.
>   327 pic_flag=" -fPIC -DPIC"
>   328 
>   329 # How to pass a linker flag through the compiler.
>   330 wl="-Wl,"
> 
> 
> This simple patch works:
> 
> sed -i 's|wl=""|wl="-Wl,"|' libtool
> 
> and gives:
> 
> libtool: link: armflang -shared   <some *.o files>    -g -fopenmp
> -mcpu=neoverse-512tvb -march=armv8.4-a+sve   -fopenmp -Wl,-soname
> -Wl,libp2.so.0 -o .libs/libp2.so.0.0.0
> 
> However, this crude hack will not work with "make distcheck",
> because it will generate a new libtool.
> 
> Still, I'm trying to understand if this is a bug in autotools,
> and if there is a workaround via edits in configure.ac and/or
> Makefile.am.
> 
> Thank you
> 
> Anton
> 
> > On 20 Oct 2023, at 08:40, Shterenlikht, Anton <
> > shterenlikht@par-tec.com> wrote:
> > 
> > [also posted in libtool@gnu.org]
> > 
> > Please help me understand how to deal correctly with this error:
> > 
> > libtool: link: armflang -shared   <some *.o files>     -g   -soname 
> > libp2.so.0 -o .libs/libp2.so.0.0.0
> > armflang: error: unknown argument: '-soname'
> > 
> > 
> > I see this issue mentioned in multiple places, e.g:
> > 
> > https://github.com/HDFGroup/hdf5/issues/366
> > 
> > with the solution that "-Wl," must be prepended somehow to "-
> > soname".
> > 
> > But I'm not sure what changes I need to do
> > to my configure.ac and/or Makefile.am
> > to fix this correctly.
> > 
> > For comparison, here's how the same line looks like when
> > I use gfortran:
> > 
> > libtool: link: gfortran -shared  -fPIC  <some *.o files>    -g
> > -O2   -Wl,-soname -Wl,libp2.so.0 -o .libs/libp2.so.0.0.0
> > 
> > 
> > Thank you
> > 
> > Anton
> 
>