collect.extra-libs.in

#!@SHELL@

# ICON
#
# ------------------------------------------
# Copyright (C) 2004-2024, DWD, MPI-M, DKRZ, KIT, ETH, MeteoSwiss
# Contact information: icon-model.org
# See AUTHORS.TXT for a list of authors
# See LICENSES/ for license information
# SPDX-License-Identifier: BSD-3-Clause
# ------------------------------------------

script_prefix=`echo "$0" | sed 's@[^/]*$@@'`
(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
cd "$script_prefix"

# Collect extra dependencies of the bundled libraries:

test $# -ne 0 || {
  set dummy @icon_bundled_builddirs@; shift
}

result=''

for subdir in "$@"; do

  test -f "$subdir/Makefile" || {
    echo "$0: WARNING: directory '$subdir' is not configured" >&2
    continue
  }

  extra_libs=''

  case $subdir in
    externals/comin/build)
      # Extract dl libs from comin cmake variable
      extra_libs=`@CMAKE@ -L $subdir | sed -n 's/^COMIN_DL_LIBS\(:[A-Z]\+\)=\(-l\)\?\(.\+\)/-l\3/p'`
      ;;
    externals/sct)
      # The bundled version of SCT, which we link statically, might require
      # additional linker flags:
      #   1) a flag enabling linking to librt;
      sct_LIBS=`echo '@''LIBS@' | "$subdir/config.status" -q --file=-`
      case " $sct_LIBS " in
        *' -lrt '*) extra_libs='-lrt' ;;
        *) ;;
      esac
      #   2) a flag enabling linking to C code that uses OpenMP.
      sct_OPENMP_FC_C_FLAGS=`echo '@''OPENMP_FC_C_FLAGS@' | "$subdir/config.status" -q --file=-`
      extra_libs="$sct_OPENMP_FC_C_FLAGS${extra_libs:+ }$extra_libs"
      ;;
    externals/cdi)
      # The bundled version of CDI, which we link statically, might require
      # additional linker flags enabling linking to librt:
      extra_libs=`echo '@''LIBRT@' | "$subdir/config.status" -q --file=-`
      if test -z $extra_libs; then
        cdi_ENABLE_MPI_TRUE=`echo '@''ENABLE_MPI_TRUE@' | "$subdir/config.status" -q --file=-`
        if test -z $cdi_ENABLE_MPI_TRUE; then
          # We are here because either CDI does not depend on librt or the
          # dependency is hidden by the libtool script of CDI (e.g. it found a
          # libtool .la file that has '-lrt' among the 'dependency_libs',
          # overlinked to librt and the configure script of CDI reported that no
          # additional linker flags are required to link to the library, hence
          # LIBRT was set to an empty string). The absence of the dependency on
          # librt is very unlikely and here we could simply set the variable
          # extra_libs to '-lrt'. However, we use this case as an example of how
          # such issues can be resolved in general. Note that libcdipio.la might
          # not exist yet, therefore we cannot parse it. Instead, we are going
          # to run the libtool script of CDI in a way that is close to how the
          # make program will call it:
          @MKDIR_P@ conftest.dir
          (
            cd conftest.dir
            cdi_LINK=`echo "@""SHELL@ ../$subdir/libtool --tag=CC --mode=link @""CC@ @""CFLAGS@ @""LDFLAGS@ -o libconftest.la @""LIBS@" | "$subdir/config.status" -q --file=-`
            # If calling the libtool script of CDI is successful and the created
            # dummy libtool file 'libconftest.la' has '-lrt' among the
            # 'dependency_libs', we set extra_libs to '-lrt':
            (eval $cdi_LINK) >/dev/null 2>&1
            if test $? -eq 0 && grep "dependency_libs=.*[ ']-lrt[ '].*" libconftest.la >/dev/null 2>&1; then
              extra_libs='-lrt'
            fi
          )
          rm -rf conftest.dir
        fi
      fi
      ;;
    *) ;;
  esac

  result="$extra_libs${result:+${extra_libs:+ }}$result"

done

echo "$result"