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eigen: svd example, use pkg-config

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Ciro Santilli
2018-05-08 22:24:18 +01:00
parent 6b61365556
commit 7cf9f23ae0
5 changed files with 36 additions and 18 deletions
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4
README.adoc
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@@ -4208,7 +4208,7 @@ Header only linear algebra library supported by Buildroot:
....
./build -B 'BR2_PACKAGE_EIGEN=y' -k
./run -F '/eigen.out'
./run -F '/eigen.out;/eigen_svd.out'
....
===== PARSEC benchmark
@@ -5050,7 +5050,7 @@ so which shows that the whole delay is inside our install itself.
I put an `echo f` in `check_bin_arch`, and it just loops forever, does not stop on a particular package.
Ignored / declied patch at: http://lists.busybox.net/pipermail/buildroot/2018-May/220662.html I might just fork Buildroot on the submodule if this keeps annoying me.
Ignored / declined patch at: http://lists.busybox.net/pipermail/buildroot/2018-May/220662.html I might just fork Buildroot on the submodule if this keeps annoying me.
=== Report upstream bugs

1
kernel_module/user/Makefile
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@@ -15,6 +15,7 @@ endif
ifeq ($(BR2_PACKAGE_EIGEN),y)
# Header only.
#LIBS += -leigen
CXXFLAGS_EXTRA += $(shell $(PKG_CONFIG) --cflags --libs eigen3)
else
OUTS := $(filter-out eigen%$(OUT_EXT),$(OUTS))
endif

4
kernel_module/user/README.adoc
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@@ -30,7 +30,3 @@ These programs can also be compiled and used on host.
.. link:ioctl.c[]
.. link:netlink.c[]
.. link:poll.c[]
. Buildroot libraries
.. link:eigen.cpp[]
.. link:openmp.c[]
.. link:openblas.c[]

21
kernel_module/user/eigen.cpp
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@@ -1,14 +1,11 @@
/* Official hello world. */
/* Adapted from: https://eigen.tuxfamily.org/dox/GettingStarted.html */
#include <iostream>
#include <eigen3/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;
#include <Eigen/Dense>
int main() {
Eigen::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;
}

24
kernel_module/user/eigen_svd.cpp Normal file
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@@ -0,0 +1,24 @@
/* Adapted from: https://eigen.tuxfamily.org/dox/classEigen_1_1JacobiSVD.html */
#include <iostream>
using std::cout;
using std::endl;
#include <Eigen/Core>
#include <Eigen/SVD>
using Eigen::ComputeThinU;
using Eigen::ComputeThinV;
using Eigen::JacobiSVD;
using Eigen::MatrixXf;
using Eigen::Vector3f;
int main() {
MatrixXf m = MatrixXf::Random(3,2);
JacobiSVD<MatrixXf> svd(m, ComputeThinU | ComputeThinV);
Vector3f rhs(1, 0, 0);
cout << "m = " << endl << m << endl << endl;
cout << "svd.singularValues() = " << endl << svd.singularValues() << endl << endl;
cout << "svd.MatrixU() = " << endl << svd.matrixU() << endl << endl;
cout << "svd.MatrixV() = " << endl << svd.matrixV() << endl << endl;
cout << "svd.solve() = " << endl << svd.solve(rhs) << endl << endl;
}