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

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 <[email protected]> wrote:
> 
> [also posted in [email protected]]
> 
> 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