How can I use Eigen within a C++ project that is built using Bazel (version 0.25.2)? I like to fetch the Eigen dependency using http_archive
or git_repository
.
I've tried the following:
main.cpp
#include <iostream>
#include <Eigen/Dense>
using Eigen::MatrixXd;
int main() {
MatrixXd m(2, 2);
m(0, 0) = 3;
m(1, 0) = 2.5;
m(0, 1) = -1;
m(1, 1) = m(1, 0) + m(0, 1);
std::cout << m << std::endl;
}
WORKSPACE
workspace(name = "EigenDemo")
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
# Eigen
http_archive(
name = "eigen",
build_file = "//:eigen.BUILD",
sha256 = "3a66f9bfce85aff39bc255d5a341f87336ec6f5911e8d816dd4a3fdc500f8acf",
url = "https://bitbucket.org/eigen/eigen/get/c5e90d9.tar.gz",
)
BUILD
cc_binary(
name = "EigenDemo",
srcs = ["main.cpp"],
deps = [
"@eigen",
],
)
eigen.BUILD
# Copyright 2017 Google Inc. 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.
package(
default_visibility = ["//visibility:public"],
)
cc_library(
name = "eigen",
hdrs = glob(
["Eigen/**"],
exclude = [
"Eigen/src/OrderingMethods/Amd.h",
"Eigen/src/SparseCholesky/**",
"Eigen/Eigen",
"Eigen/IterativeLinearSolvers",
"Eigen/MetisSupport",
"Eigen/Sparse",
"Eigen/SparseCholesky",
"Eigen/SparseLU",
],
),
defines = [
"EIGEN_MPL_ONLY",
"EIGEN_NO_DEBUG",
],
includes = ["."],
)
Error output:
INFO: Analysed target //:EigenTest (0 packages loaded, 0 targets configured).
INFO: Found 1 target...
ERROR: /BazelDemos/EigenDemo/BUILD:1:1: C++ compilation of rule '//:EigenTest' failed (Exit 1) gcc failed: error executing command /usr/bin/gcc -U_FORTIFY_SOURCE -fstack-protector -Wall -Wunused-but-set-parameter -Wno-free-nonheap-object -fno-omit-frame-pointer '-std=c++0x' -MD -MF ... (remaining 40 argument(s) skipped)
Use --sandbox_debug to see verbose messages from the sandbox
main.cpp:2:10: fatal error: Eigen/Dense: No such file or directory
#include <Eigen/Dense>
^~~~~~~~~~~~~
compilation terminated.
Target //:EigenTest failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 0.258s, Critical Path: 0.10s
INFO: 0 processes.
FAILED: Build did NOT complete successfully
strip_prefix
is missing in the WORKSPACE
file:
workspace(name = "EigenDemo")
load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
# Eigen
http_archive(
name = "eigen",
build_file = "//:eigen.BUILD",
sha256 = "3a66f9bfce85aff39bc255d5a341f87336ec6f5911e8d816dd4a3fdc500f8acf",
url = "https://bitbucket.org/eigen/eigen/get/c5e90d9.tar.gz",
strip_prefix="eigen-eigen-c5e90d9e764e"
)