1#!/bin/bash 2# 3# Copyright 2016 The Bazel Authors. All rights reserved. 4# 5# Licensed under the Apache License, Version 2.0 (the "License"); 6# you may not use this file except in compliance with the License. 7# You may obtain a copy of the License at 8# 9# http://www.apache.org/licenses/LICENSE-2.0 10# 11# Unless required by applicable law or agreed to in writing, software 12# distributed under the License is distributed on an "AS IS" BASIS, 13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14# See the License for the specific language governing permissions and 15# limitations under the License. 16 17# This script handles interface library generation for dynamic library 18# link action. 19# 20# Bazel can be configured to generate external interface library script 21# to generate interface libraries in CppLinkAction for dynamic libraries. 22# This is not needed on Windows (as the "interface" libraries are 23# generated by default). This script therefore handles the cases when 24# external script is provided, or when no script should be used. 25 26set -eu 27 28E_LINKER_COMMAND_NOT_FOUND=12 29E_INTERFACE_BUILDER_NOT_FOUND=13 30 31 32SUFFIX=".rewritten" 33 34other_args="" 35 36if [[ "$#" -eq 1 ]]; then 37 if [[ "$1" != @* ]]; then 38 echo "Parameter file must start with @" 1>&2; 39 exit "$E_LINKER_COMMAND_NOT_FOUND" 40 fi 41 42 filename=$(echo "$1" | cut -c2-) 43 first_five_lines=$(head -n 5 $filename) 44 45 # Should generate interface library switch (<yes|no>); if the value is "no", 46 # following 3 args are ignored (but must be present) 47 GENERATE_INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n1 | tail -n1) 48 # Tool which can generate interface library from dynamic library file 49 INTERFACE_LIBRARY_BUILDER=$(echo "$first_five_lines" | head -n2 | tail -n1) 50 # Dynamic library from which we want to generate interface library 51 DYNAMIC_LIBRARY=$(echo "$first_five_lines" | head -n3 | tail -n1) 52 # Resulting interface library 53 INTERFACE_LIBRARY=$(echo "$first_five_lines" | head -n4 | tail -n1) 54 # The command used to generate the dynamic library 55 LINKER_COMMAND=$(echo "$first_five_lines" | head -n5 | tail -n1) 56 57 rest_of_lines=$(tail -n +6 $filename) 58 new_param_file="${filename}${SUFFIX}" 59 echo "$rest_of_lines" > $new_param_file 60 other_args="@$new_param_file" 61 62 if [[ ! -e "$LINKER_COMMAND" ]]; then 63 echo "Linker command ($LINKER_COMMAND) not found." 1>&2; 64 exit "$E_LINKER_COMMAND_NOT_FOUND" 65 fi 66 67 if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then 68 INTERFACE_GENERATION=: 69 else 70 if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then 71 echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER) 72 not found." 1>&2; 73 exit "$E_INTERFACE_BUILDER_NOT_FOUND" 74 fi 75 INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY} 76 ${INTERFACE_LIBRARY}" 77 fi 78 79 ${LINKER_COMMAND} "$other_args" && ${INTERFACE_GENERATION} 80else 81 # TODO(b/113358321): Remove this branch once projects are migrated to not 82 # splitting the linking command line. 83 # Should generate interface library switch (<yes|no>); if the value is "no", 84 # following 3 args are ignored (but must be present) 85 GENERATE_INTERFACE_LIBRARY="$1" 86 # Tool which can generate interface library from dynamic library file 87 INTERFACE_LIBRARY_BUILDER="$2" 88 # Dynamic library from which we want to generate interface library 89 DYNAMIC_LIBRARY="$3" 90 # Resulting interface library 91 INTERFACE_LIBRARY="$4" 92 # The command used to generate the dynamic library 93 LINKER_COMMAND="$5" 94 shift 5 95 if [[ ! -e "$LINKER_COMMAND" ]]; then 96 echo "Linker command ($LINKER_COMMAND) not found." 1>&2; 97 exit "$E_LINKER_COMMAND_NOT_FOUND" 98 fi 99 100 if [[ "no" == "$GENERATE_INTERFACE_LIBRARY" ]]; then 101 INTERFACE_GENERATION=: 102 else 103 if [[ ! -e "$INTERFACE_LIBRARY_BUILDER" ]]; then 104 echo "Interface library builder ($INTERFACE_LIBRARY_BUILDER) 105 not found." 1>&2; 106 exit "$E_INTERFACE_BUILDER_NOT_FOUND" 107 fi 108 INTERFACE_GENERATION="${INTERFACE_LIBRARY_BUILDER} ${DYNAMIC_LIBRARY} 109 ${INTERFACE_LIBRARY}" 110 fi 111 112 ${LINKER_COMMAND} "$@" && ${INTERFACE_GENERATION} 113fi 114