1 files changed, 113 insertions, 0 deletions
diff --git a/cc/private/toolchain/link_dynamic_library.sh b/cc/private/toolchain/link_dynamic_library.sh
new file mode 100755
index 0000000..c71d498
--- /dev/null
+++ b/cc/private/toolchain/link_dynamic_library.sh
@@ -0,0 +1,113 @@
+#!/bin/bash
+#
+# Copyright 2016 The Bazel Authors. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# This script handles interface library generation for dynamic library
+# link action.
+#
+# Bazel can be configured to generate external interface library script
+# to generate interface libraries in CppLinkAction for dynamic libraries.
+# This is not needed on Windows (as the "interface" libraries are
+# generated by default). This script therefore handles the cases when
+# external script is provided, or when no script should be used.
+
+set -eu
+
+E_LINKER_COMMAND_NOT_FOUND=12
+E_INTERFACE_BUILDER_NOT_FOUND=13
+
+
+SUFFIX=".rewritten"
+
+other_args=""
+
+if [[ "$#" -eq 1 ]]; then
+  if [[ "$1" != @* ]]; then
+    echo "Parameter file must start with @" 1>&2;
+    exit "$E_LINKER_COMMAND_NOT_FOUND"
+  fi
+
+  filename=$(echo "$1" | cut -c2-)
+  first_five_lines=$(head -n 5 $filename)
+
+  # Should generate interface library switch (<yes|no>); if the value is "no",
+  # following 3 args are ignored (but must be present)
+  GENERATE_INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n1 | tail -n1)
+  # Tool which can generate interface library from dynamic library file
+  INTERFACE_LIBRARY_BUILDER=$(echo "$first_five_lines" | head -n2 | tail -n1)
+  # Dynamic library from which we want to generate interface library
+  DYNAMIC_LIBRARY=$(echo "$first_five_lines" | head -n3 | tail -n1)
+  # Resulting interface library
+  INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n4 | tail -n1)
+  # The command used to generate the dynamic library
+  LINKER_COMMAND=$(echo "$first_five_lines" | head -n5 | tail -n1)
+
+  rest_of_lines=$(tail -n +6 $filename)
+  new_param_file="${filename}${SUFFIX}"
+  echo "$rest_of_lines" > $new_param_file
+  other_args="@$new_param_file"
+
+  if [[ ! -e "$LINKER_COMMAND" ]]; then
+    echo "Linker command ($LINKER_COMMAND) not found." 1>&2;
+    exit "$E_LINKER_COMMAND_NOT_FOUND"
+  fi
+
+  if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then
+      INTERFACE_GENERATION=:
+  else
+      if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then
+        echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER)
+        not found." 1>&2;
+        exit "$E_INTERFACE_BUILDER_NOT_FOUND"
+      fi
+      INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY}
+      ${INTERFACE_LIBRARY}"
+  fi
+
+  ${LINKER_COMMAND} "$other_args" && ${INTERFACE_GENERATION}
+else
+  # TODO(b/113358321): Remove this branch once projects are migrated to not
+  #  splitting the linking command line.
+  # Should generate interface library switch (<yes|no>); if the value is "no",
+  # following 3 args are ignored (but must be present)
+  GENERATE_INTERFACE_LIBRARY="$1"
+  # Tool which can generate interface library from dynamic library file
+  INTERFACE_LIBRARY_BUILDER="$2"
+  # Dynamic library from which we want to generate interface library
+  DYNAMIC_LIBRARY="$3"
+  # Resulting interface library
+  INTERFACE_LIBRARY="$4"
+  # The command used to generate the dynamic library
+  LINKER_COMMAND="$5"
+  shift 5
+  if [[ ! -e "$LINKER_COMMAND" ]]; then
+    echo "Linker command ($LINKER_COMMAND) not found." 1>&2;
+    exit "$E_LINKER_COMMAND_NOT_FOUND"
+  fi
+
+  if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then
+      INTERFACE_GENERATION=:
+  else
+      if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then
+        echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER)
+        not found." 1>&2;
+        exit "$E_INTERFACE_BUILDER_NOT_FOUND"
+      fi
+      INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY}
+      ${INTERFACE_LIBRARY}"
+  fi
+
+  ${LINKER_COMMAND} "$@" && ${INTERFACE_GENERATION}
+fi