From ed0d8277204dc75ad3796657f190bf1e8373f2e9 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 11:04:44 -0500
Subject: [PATCH 01/31] Add a cygwin build to the PR list.

We'll see if this works.
---
 .github/workflows/cygwin-python.yml | 33 +++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)
 create mode 100644 .github/workflows/cygwin-python.yml

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
new file mode 100644
index 0000000..1920468
--- /dev/null
+++ b/.github/workflows/cygwin-python.yml
@@ -0,0 +1,33 @@
+name: Cygwin Build
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    runs-on: windows-latest
+
+    steps:
+      - name: Install Cygwin
+        uses: egor-tensin/setup-cygwin@v3
+        with:
+          platform: x64
+          packages: python38-numpy python38-pytest python38-hypothesis python38-cython
+      - name: Install dependencies
+        run: |
+          python3.8 -m pip install --upgrade pip
+          python3.8 -m pip install Cython numpy scipy
+          python3.8 -m pip install -r requirements.txt
+          python3.8 -m pip install -r requirements-test.txt
+      - name: Test with pytest
+        run: |
+          python3.8 -m pip install pytest
+          python3.8 -m pip install .
+          python3.8 setup.py check
+          python3.8 -m pytest
+          python3.8 -m pytest --pyargs py_toeplitz --doctest-modules

From f417501a1d4de7fb9cef349e84dbf8eff3da98bb Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 11:13:08 -0500
Subject: [PATCH 02/31] Checkout the repository in the Cygwin build.

---
 .github/workflows/cygwin-python.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 1920468..2646bec 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -13,6 +13,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
+      - uses: actions/checkout@v2
       - name: Install Cygwin
         uses: egor-tensin/setup-cygwin@v3
         with:

From 4ca35557ad6b48477e809a7fcd4a07a8c5e27a56 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 11:45:56 -0500
Subject: [PATCH 03/31] Add more requirements to the cygwin setup.

---
 .github/workflows/cygwin-python.yml | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 2646bec..3156188 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -18,10 +18,10 @@ jobs:
         uses: egor-tensin/setup-cygwin@v3
         with:
           platform: x64
-          packages: python38-numpy python38-pytest python38-hypothesis python38-cython
+          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools
       - name: Install dependencies
         run: |
-          python3.8 -m pip install --upgrade pip
+          python3.8 -m pip install --upgrade pip wheel
           python3.8 -m pip install Cython numpy scipy
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt

From 017f1fd3048b4299f2dfbc6fad2604ec55eac3f6 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 12:00:34 -0500
Subject: [PATCH 04/31] Try to cache the pip cache in the GitHub Actions cache.

This should speed things up a bit.

Also caches the Cygwin download cache.  I don't want to try skipping
setup.exe entirely, but this should help.
---
 .github/workflows/cygwin-python.yml | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 3156188..2a5aabd 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -14,11 +14,30 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
+      - name: Setup cache for Cygwin and pip
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cache/pip/
+            C:\tools\cygwin\packages
+        key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-build-
+          ${{ runner.os }}-
       - name: Install Cygwin
+        id: install-cygwin
         uses: egor-tensin/setup-cygwin@v3
         with:
           platform: x64
+          install-dir: "C:\tools\cygwin"
           packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools
+      - name: Clean Windows PATH
+        uses: egor-tensin/cleanup-path@v1
+        with:
+          dirs: ${{ steps.install-cygwin.install-dir }}
+      - name: Ask pip to use cache contents
+        run: |
+          bash -c "echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'"
       - name: Install dependencies
         run: |
           python3.8 -m pip install --upgrade pip wheel

From 47c00f3ae110d247b3dc2ede2eeea55c22e87790 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 12:07:41 -0500
Subject: [PATCH 05/31] YAML syntax fix.

---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 2a5aabd..e31bff5 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -29,7 +29,7 @@ jobs:
         uses: egor-tensin/setup-cygwin@v3
         with:
           platform: x64
-          install-dir: "C:\tools\cygwin"
+          install-dir: 'C:\tools\cygwin'
           packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1

From 9b540801cea63b74ea825fe697bafc0108c5d0b6 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 12:09:19 -0500
Subject: [PATCH 06/31] Move cache settings to with: block where they belong.

---
 .github/workflows/cygwin-python.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index e31bff5..c294d95 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -20,10 +20,10 @@ jobs:
           path: |
             ~/.cache/pip/
             C:\tools\cygwin\packages
-        key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-build-
-          ${{ runner.os }}-
+            key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
+            restore-keys: |
+              ${{ runner.os }}-build-
+              ${{ runner.os }}-
       - name: Install Cygwin
         id: install-cygwin
         uses: egor-tensin/setup-cygwin@v3

From d1c3214dafeb25ab32d7a2145186918b76cdc931 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 12:11:26 -0500
Subject: [PATCH 07/31] Fix syntax so config is actually in with: block.

---
 .github/workflows/cygwin-python.yml | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index c294d95..0506f50 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -20,10 +20,10 @@ jobs:
           path: |
             ~/.cache/pip/
             C:\tools\cygwin\packages
-            key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
-            restore-keys: |
-              ${{ runner.os }}-build-
-              ${{ runner.os }}-
+          key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-build-
+            ${{ runner.os }}-
       - name: Install Cygwin
         id: install-cygwin
         uses: egor-tensin/setup-cygwin@v3

From f5569325788d767d3436354cfab88876ba468fa7 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 12:39:18 -0500
Subject: [PATCH 08/31] Make pip config directory.

---
 .github/workflows/cygwin-python.yml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 0506f50..0cd4d49 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -37,6 +37,7 @@ jobs:
           dirs: ${{ steps.install-cygwin.install-dir }}
       - name: Ask pip to use cache contents
         run: |
+          mkdir -p ~/.config/pip
           bash -c "echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'"
       - name: Install dependencies
         run: |

From 34f61c5c24dc0f37679a67f85a5c55b16eaaa793 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 13:38:34 -0500
Subject: [PATCH 09/31] Wrap everything in "bash -c".

Try to ensure everything actually runs in Cygwin.
---
 .github/workflows/cygwin-python.yml | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 0cd4d49..c4a140b 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -37,18 +37,18 @@ jobs:
           dirs: ${{ steps.install-cygwin.install-dir }}
       - name: Ask pip to use cache contents
         run: |
-          mkdir -p ~/.config/pip
+          bash -c "mkdir -p ~/.config/pip"
           bash -c "echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'"
       - name: Install dependencies
         run: |
-          python3.8 -m pip install --upgrade pip wheel
-          python3.8 -m pip install Cython numpy scipy
-          python3.8 -m pip install -r requirements.txt
-          python3.8 -m pip install -r requirements-test.txt
+          bash -c "python3.8 -m pip install --upgrade pip wheel"
+          bash -c "python3.8 -m pip install Cython numpy scipy"
+          bash -c "python3.8 -m pip install -r requirements.txt"
+          bash -c "python3.8 -m pip install -r requirements-test.txt"
       - name: Test with pytest
         run: |
-          python3.8 -m pip install pytest
-          python3.8 -m pip install .
-          python3.8 setup.py check
-          python3.8 -m pytest
-          python3.8 -m pytest --pyargs py_toeplitz --doctest-modules
+          bash -c "python3.8 -m pip install pytest"
+          bash -c "python3.8 -m pip install ."
+          bash -c "python3.8 setup.py check"
+          bash -c "python3.8 -m pytest"
+          bash -c "python3.8 -m pytest --pyargs py_toeplitz --doctest-modules"

From 273a684a1638281d9beca29a460a926b366c1ca5 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 15:43:08 -0500
Subject: [PATCH 10/31] Tell SciPy which BLAS and LAPACK to use.

BLAS will redirect to openblas at runtime.
---
 .github/workflows/cygwin-python.yml | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index c4a140b..b8234bd 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -30,7 +30,7 @@ jobs:
         with:
           platform: x64
           install-dir: 'C:\tools\cygwin'
-          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools
+          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
@@ -40,6 +40,9 @@ jobs:
           bash -c "mkdir -p ~/.config/pip"
           bash -c "echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'"
       - name: Install dependencies
+        env:
+          BLAS: /usr/lib/libblas.dll.a
+          LAPACK: /usr/lib/liblapack.dll.a
         run: |
           bash -c "python3.8 -m pip install --upgrade pip wheel"
           bash -c "python3.8 -m pip install Cython numpy scipy"

From 057d0e6d967c26f09518844cd0de19eba9779164 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 17:19:24 -0500
Subject: [PATCH 11/31] Condense requirements files.

---
 .github/workflows/cygwin-python.yml | 3 +--
 requirements-dev.txt                | 2 +-
 requirements-test.txt               | 2 +-
 3 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index b8234bd..fd1bdbd 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -30,7 +30,7 @@ jobs:
         with:
           platform: x64
           install-dir: 'C:\tools\cygwin'
-          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas
+          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas gcc-fortran
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
@@ -45,7 +45,6 @@ jobs:
           LAPACK: /usr/lib/liblapack.dll.a
         run: |
           bash -c "python3.8 -m pip install --upgrade pip wheel"
-          bash -c "python3.8 -m pip install Cython numpy scipy"
           bash -c "python3.8 -m pip install -r requirements.txt"
           bash -c "python3.8 -m pip install -r requirements-test.txt"
       - name: Test with pytest
diff --git a/requirements-dev.txt b/requirements-dev.txt
index c1107de..0d24446 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,3 @@
+-r requirements.txt
 cython>=0.16
 numpy
-scipy>-0.16.0
diff --git a/requirements-test.txt b/requirements-test.txt
index 6509381..33e498b 100644
--- a/requirements-test.txt
+++ b/requirements-test.txt
@@ -1,3 +1,3 @@
+-r requirements.txt
 pytest-cov
 hypothesis[numpy]>=4.38.0
-scipy

From d5f078d69b7d5cdfe7010f788c571a72ddae649d Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 17:20:36 -0500
Subject: [PATCH 12/31] Update benchmark dependency versions.

---
 asv.conf.json | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/asv.conf.json b/asv.conf.json
index 889ee70..1bdf3ce 100644
--- a/asv.conf.json
+++ b/asv.conf.json
@@ -77,9 +77,9 @@
     //     "pip+emcee": [""],   // emcee is only available for install with pip.
     // },
     "matrix": {
-	"numpy": ["1.16.6"],
-	"scipy": ["1.2.3"],
-	"cython": ["0.29.15"],
+	"numpy": ["1.20.0"],
+	"scipy": ["1.6.0"],
+	"cython": ["0.29.21"],
 	".": [""],
     },
 

From ab7d4227e9183663df253a2796ed7804f1c25a5d Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 17:36:14 -0500
Subject: [PATCH 13/31] Note that the cython implementation makes the wheels
 non-universal.

---
 setup.cfg | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/setup.cfg b/setup.cfg
index bb243e8..ab4ca17 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -41,8 +41,5 @@ python_requires= >=2.7, <4, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*, !=3.4.*
 [options.packages.find]
 where=src
 
-[bdist_wheel]
-universal=True
-
 [sdist]
 formats=bztar,zip,gztar
\ No newline at end of file

From f5a7fac7424781ff386cd215343d7e7722957abc Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 3 Feb 2021 17:37:22 -0500
Subject: [PATCH 14/31] Don't count linter helper files in coverage stats.

They aren't going to be imported or used, and they aren't supposed to
be.
---
 .coveragerc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.coveragerc b/.coveragerc
index 291b0a3..39d874e 100644
--- a/.coveragerc
+++ b/.coveragerc
@@ -8,4 +8,4 @@ source=py_toeplitz
 fail_under=98
 show_missing=True
 skip_covered=True
-omit=*_flymake.py
\ No newline at end of file
+omit=*_flymake.py

From 5d3a170fc33ca316040f9c278c0b3263ee8e3500 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Wed, 31 Mar 2021 12:13:56 -0400
Subject: [PATCH 15/31] Separate out wheel build and install steps, and check
 DLLs.

I think this is also a problem here.  We'll see.
---
 .github/workflows/cygwin-python.yml | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index fd1bdbd..4dd3c48 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -47,6 +47,29 @@ jobs:
           bash -c "python3.8 -m pip install --upgrade pip wheel"
           bash -c "python3.8 -m pip install -r requirements.txt"
           bash -c "python3.8 -m pip install -r requirements-test.txt"
+      - name: Build wheel
+        run: |
+          bash -c "python3.8 setup.py bdist_wheel"
+      - name: Install wheel
+        run: |
+          bash -c "python3.8 -m pip install dist/py_toeplitz*.whl"
+      - name: Check that pip installed the extensions
+        run: |
+          bash -c "python3.7 -m pip show py_toeplitz
+          bash -c "python3.7 -m pip show -f py_toeplitz | grep .dll"
+          echo >list_dlls_dos.sh 'site_packages=$(python3.7 -m pip show py_toeplitz | grep Location | cut -d " " -f 2 -);
+          dll_list=$(for name in $(python3.7 -m pip show -f py_toeplitz | grep -F .dll); do echo ${site_packages}/${name}; done)
+          ls -l ${dll_list}
+          file ${dll_list}
+          ldd ${dll_list}
+          cygcheck ${dll_list}
+          for name in ${dll_list};
+          do
+              python3.7 -c "import "$(echo ${name} | sed -E -e "s|/home.*?site-packages/||g" -e "s|/|.|g" -e "s/.cpython-3.-x86(_64)?-cygwin.dll//g")
+          done
+          '
+          bash -c "tr -d '\r' <list_dlls_dos.sh >list_dlls_unix.sh"
+          bash list_dlls_unix.sh
       - name: Test with pytest
         run: |
           bash -c "python3.8 -m pip install pytest"

From 9a319ea5eda53a2b643742c191e1c5f16717ce41 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Tue, 20 Jul 2021 15:41:56 -0400
Subject: [PATCH 16/31] Add the Cygwin bin and fallback lapack directories to
 PATH

Being able to find the linear algebra libraries is nice.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 4dd3c48..aed782f 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
-          dirs: ${{ steps.install-cygwin.install-dir }}
+          dirs: ${{ steps.install-cygwin.install-dir }}'\bin;'${{ steps.install-cygwin.install-dir }}'\lib\lapack'
       - name: Ask pip to use cache contents
         run: |
           bash -c "mkdir -p ~/.config/pip"

From 58ad57ad08da17837382dc192fc26eba9c51c855 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Tue, 20 Jul 2021 15:49:30 -0400
Subject: [PATCH 17/31] Stop trying to use variables for install path

Just try to remember to install it.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index aed782f..68a4540 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
-          dirs: ${{ steps.install-cygwin.install-dir }}'\bin;'${{ steps.install-cygwin.install-dir }}'\lib\lapack'
+          dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
       - name: Ask pip to use cache contents
         run: |
           bash -c "mkdir -p ~/.config/pip"

From ec4357b6fe9c3e5361d12808a60449e8ced43347 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Tue, 20 Jul 2021 16:52:01 -0400
Subject: [PATCH 18/31] Add C++ compiler to required packages

SciPy uses C++ now.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 68a4540..a1f892a 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -30,7 +30,7 @@ jobs:
         with:
           platform: x64
           install-dir: 'C:\tools\cygwin'
-          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas gcc-fortran
+          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas gcc-fortran gcc-g++
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:

From a31f115296b57e38bb36f94f89a23f818fe96355 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 13 May 2022 11:14:11 -0400
Subject: [PATCH 19/31] CI: Update Cygwin build action

Specify shell as bash, wrap lines, consistently use python 3.8, and change to "official" Cygwin install action.
---
 .github/workflows/cygwin-python.yml | 56 +++++++++++++++--------------
 1 file changed, 30 insertions(+), 26 deletions(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index a1f892a..a16afe3 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -14,66 +14,70 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: Setup cache for Cygwin and pip
+      - name: Setup cache for pip
         uses: actions/cache@v2
         with:
           path: |
             ~/.cache/pip/
-            C:\tools\cygwin\packages
           key: ${{ runner.os }}-build-${{ hashFiles('requirements*.txt') }}
           restore-keys: |
             ${{ runner.os }}-build-
             ${{ runner.os }}-
       - name: Install Cygwin
         id: install-cygwin
-        uses: egor-tensin/setup-cygwin@v3
+        uses: cygwin/cygwin-install-action@v2
         with:
-          platform: x64
-          install-dir: 'C:\tools\cygwin'
-          packages: python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip python38-wheel python38-setuptools liblapack-devel libopenblas gcc-fortran gcc-g++
+          platform: x86_64
+          install-dir: 'C:\cygwin'
+          packages: >-
+              python38-devel python38-numpy python38-pytest python38-hypothesis python38-cython python38-pip 
+              python38-wheel python38-setuptools liblapack-devel libopenblas gcc-fortran gcc-g++
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
           dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
       - name: Ask pip to use cache contents
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          bash -c "mkdir -p ~/.config/pip"
-          bash -c "echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'"
+          mkdir -p ~/.config/pip
+          echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'
       - name: Install dependencies
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         env:
           BLAS: /usr/lib/libblas.dll.a
           LAPACK: /usr/lib/liblapack.dll.a
         run: |
-          bash -c "python3.8 -m pip install --upgrade pip wheel"
-          bash -c "python3.8 -m pip install -r requirements.txt"
-          bash -c "python3.8 -m pip install -r requirements-test.txt"
+          python3.8 -m pip install --upgrade pip wheel
+          python3.8 -m pip install -r requirements.txt
+          python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          bash -c "python3.8 setup.py bdist_wheel"
+          python3.8 setup.py bdist_wheel
       - name: Install wheel
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          bash -c "python3.8 -m pip install dist/py_toeplitz*.whl"
+          python3.8 -m pip install dist/py_toeplitz*.whl
       - name: Check that pip installed the extensions
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          bash -c "python3.7 -m pip show py_toeplitz
-          bash -c "python3.7 -m pip show -f py_toeplitz | grep .dll"
-          echo >list_dlls_dos.sh 'site_packages=$(python3.7 -m pip show py_toeplitz | grep Location | cut -d " " -f 2 -);
-          dll_list=$(for name in $(python3.7 -m pip show -f py_toeplitz | grep -F .dll); do echo ${site_packages}/${name}; done)
+          python3.8 -m pip show py_toeplitz
+          python3.8 -m pip show -f py_toeplitz | grep .dll
+          site_packages=$(python3.8 -m pip show py_toeplitz | grep Location | cut -d " " -f 2 -);
+          dll_list=$(for name in $(python3.8 -m pip show -f py_toeplitz | grep -F .dll); do echo ${site_packages}/${name}; done)
           ls -l ${dll_list}
           file ${dll_list}
           ldd ${dll_list}
           cygcheck ${dll_list}
           for name in ${dll_list};
           do
-              python3.7 -c "import "$(echo ${name} | sed -E -e "s|/home.*?site-packages/||g" -e "s|/|.|g" -e "s/.cpython-3.-x86(_64)?-cygwin.dll//g")
+              python3.8 -c "import "$(echo ${name} | sed -E -e "s|/home.*?site-packages/||g" -e "s|/|.|g" -e "s/.cpython-3.*-x86(_64)?-cygwin.dll//g")
           done
-          '
-          bash -c "tr -d '\r' <list_dlls_dos.sh >list_dlls_unix.sh"
-          bash list_dlls_unix.sh
       - name: Test with pytest
+        shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
-          bash -c "python3.8 -m pip install pytest"
-          bash -c "python3.8 -m pip install ."
-          bash -c "python3.8 setup.py check"
-          bash -c "python3.8 -m pytest"
-          bash -c "python3.8 -m pytest --pyargs py_toeplitz --doctest-modules"
+          python3.8 -m pip install pytest
+          python3.8 -m pip install .
+          python3.8 setup.py check
+          python3.8 -m pytest
+          python3.8 -m pytest --pyargs py_toeplitz --doctest-modules

From 5159099e3b98127cc15f382d3ca04fb4b7b2bce3 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 13 May 2022 11:17:19 -0400
Subject: [PATCH 20/31] CI: Update tested python versions.

Drop 3.5, add 3.8-3.10.
---
 .github/workflows/pythonpackage.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 78d4bba..24b279a 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [2.7, 3.5, 3.6, 3.7]
+        python-version: [2.7, 3.6, 3.7, 3.8, 3.9, 3.10]
 
     steps:
     - uses: actions/checkout@v1

From 26b8e1fbb9a5dc219b0d44f79b7683fefbd87aac Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 13 May 2022 11:23:33 -0400
Subject: [PATCH 21/31] CI: Specify python versions as strings.

Hopefully this lets install-python try for 3.10 instead of 3.1
---
 .github/workflows/pythonpackage.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 24b279a..655bc85 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -15,7 +15,7 @@ jobs:
     strategy:
       max-parallel: 4
       matrix:
-        python-version: [2.7, 3.6, 3.7, 3.8, 3.9, 3.10]
+        python-version: ["2.7", "3.6", "3.7", "3.8", "3.9", "3.10"]
 
     steps:
     - uses: actions/checkout@v1

From eb8ca1607c8dfd61da3ad2a3ec5205f5bd855ac8 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 13 May 2022 12:37:13 -0400
Subject: [PATCH 22/31] CI: Specify SciPy version to install.

Unpatched SciPy 1.7+ doesn't install on Cygwin
---
 .github/workflows/cygwin-python.yml | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index a16afe3..f910fb5 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -47,7 +47,8 @@ jobs:
           BLAS: /usr/lib/libblas.dll.a
           LAPACK: /usr/lib/liblapack.dll.a
         run: |
-          python3.8 -m pip install --upgrade pip wheel
+          python3.8 -m pip install --upgrade pip wheel 'setuptools<60'
+          python3.8 -m pip install 'scipy<1.7'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel

From 9622f5cf6d59773a1632a5191253e167a3e0b8c4 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 13 May 2022 15:43:42 -0400
Subject: [PATCH 23/31] CI: Specify build dependencies for install

SciPy install fails for some reason.
---
 .github/workflows/cygwin-python.yml | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index f910fb5..fc24cb9 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -36,6 +36,11 @@ jobs:
         uses: egor-tensin/cleanup-path@v1
         with:
           dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
+      - name: Specify python version
+        shell: bash.exe -eo pipefail -o igncr "{0}"
+        run: |
+          /usr/sbin/alternatives --set python /usr/bin/python3.8
+          /usr/sbin/alternatives --set python3 /usr/bin/python3.8
       - name: Ask pip to use cache contents
         shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
@@ -46,8 +51,14 @@ jobs:
         env:
           BLAS: /usr/lib/libblas.dll.a
           LAPACK: /usr/lib/liblapack.dll.a
+          NPY_LAPACK_ORDER: openblas,lapack
+          NPY_BLAS_ORDER: openblas,blas
+          NPY_BLAS_LIBS: -lblas
+          NPY_LAPACK_LIBS: -llapack -lblas
         run: |
           python3.8 -m pip install --upgrade pip wheel 'setuptools<60'
+          python3.8 -m pip install cython pythran pybind11
+          python3.8 -m pip install 'numpy!=1.21.*'
           python3.8 -m pip install 'scipy<1.7'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt

From 4c48b6052837287d4c970990e1ad9ab757699cbf Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Sat, 14 May 2022 08:13:05 -0400
Subject: [PATCH 24/31] CI: Check that NumPy imports

---
 .github/workflows/cygwin-python.yml | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index fc24cb9..1448cc5 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -46,7 +46,7 @@ jobs:
         run: |
           mkdir -p ~/.config/pip
           echo >~/.config/pip/pip.conf $'[install]\nprefer-binary = True'
-      - name: Install dependencies
+      - name: Install build dependencies
         shell: bash.exe -eo pipefail -o igncr "{0}"
         env:
           BLAS: /usr/lib/libblas.dll.a
@@ -59,6 +59,22 @@ jobs:
           python3.8 -m pip install --upgrade pip wheel 'setuptools<60'
           python3.8 -m pip install cython pythran pybind11
           python3.8 -m pip install 'numpy!=1.21.*'
+      - name: Check NumPy import
+        shell: bash.exe -eo pipefail -o igncr "{0}"
+        run: |
+          python3.8 -v -c "import numpy as np; print(np.__version__)"
+          python3.8 -v -c "import numpy.linalg as la"
+          python3.8 -v -c "import numpy.linalg.lapack_lite"
+      - name: Install more dependencies
+        shell: bash.exe -eo pipefail -o igncr "{0}"
+        env:
+          BLAS: /usr/lib/libblas.dll.a
+          LAPACK: /usr/lib/liblapack.dll.a
+          NPY_LAPACK_ORDER: openblas,lapack
+          NPY_BLAS_ORDER: openblas,blas
+          NPY_BLAS_LIBS: -lblas
+          NPY_LAPACK_LIBS: -llapack -lblas
+        run: |
           python3.8 -m pip install 'scipy<1.7'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt

From 6f6d198a5c7fe19ea8f7c5d239d3113f4a1f885f Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Sat, 14 May 2022 08:52:01 -0400
Subject: [PATCH 25/31] CI: Check NumPy DLLs.

---
 .github/workflows/cygwin-python.yml | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 1448cc5..7c0addb 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -62,6 +62,10 @@ jobs:
       - name: Check NumPy import
         shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |
+          ls -l $(find /usr/local/lib/python3.8/site-packages/numpy/ -name \*.dll)
+          file $(find /usr/local/lib/python3.8/site-packages/numpy/ -name \*.dll)
+          cygcheck $(find /usr/local/lib/python3.8/site-packages/numpy/ -name \*.dll)
+          ldd $(find /usr/local/lib/python3.8/site-packages/numpy/ -name \*.dll)
           python3.8 -v -c "import numpy as np; print(np.__version__)"
           python3.8 -v -c "import numpy.linalg as la"
           python3.8 -v -c "import numpy.linalg.lapack_lite"

From 19f80b794a43c86efe9adebcefc33328dc398537 Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Sat, 14 May 2022 08:57:32 -0400
Subject: [PATCH 26/31] CI: Update path to include current Cygwin dir

I left it at the defaults for the old Cygwin directory
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 7c0addb..98d0cba 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -35,7 +35,7 @@ jobs:
       - name: Clean Windows PATH
         uses: egor-tensin/cleanup-path@v1
         with:
-          dirs: 'C:\tools\cygwin\bin;C:\tools\cygwin\lib\lapack'
+          dirs: 'C:\cygwin\bin;C:\cygwin\lib\lapack'
       - name: Specify python version
         shell: bash.exe -eo pipefail -o igncr "{0}"
         run: |

From 7ac59a0682254ddb2c9d1b8377706f38983c5ffa Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 20 May 2022 14:44:16 -0400
Subject: [PATCH 27/31] CI: Update SciPy version on Cygwin

See if this fixes the weird compile error.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 98d0cba..e73ac98 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -79,7 +79,7 @@ jobs:
           NPY_BLAS_LIBS: -lblas
           NPY_LAPACK_LIBS: -llapack -lblas
         run: |
-          python3.8 -m pip install 'scipy<1.7'
+          python3.8 -m pip install 'scipy>=1.8.1'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel

From fe2e10eeb1143fb9e8b66225ac0b1de7031cc82e Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Sun, 29 May 2022 14:02:18 -0400
Subject: [PATCH 28/31] CI: Revert back to using SciPy 1.6

Should update to 1.9 once that's available.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index e73ac98..4945710 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -79,7 +79,7 @@ jobs:
           NPY_BLAS_LIBS: -lblas
           NPY_LAPACK_LIBS: -llapack -lblas
         run: |
-          python3.8 -m pip install 'scipy>=1.8.1'
+          python3.8 -m pip install 'scipy!=1.7.*,!=1.8.*'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel

From 1f944441e7a6f9cd2d82de06d1ff2966138f8fda Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 10 Jun 2022 13:21:29 -0400
Subject: [PATCH 29/31] CI: Try installing SciPy 1.5

This used to work.  I should check what the versions were back when I was testing this with tox.
---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 4945710..70461ef 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -79,7 +79,7 @@ jobs:
           NPY_BLAS_LIBS: -lblas
           NPY_LAPACK_LIBS: -llapack -lblas
         run: |
-          python3.8 -m pip install 'scipy!=1.7.*,!=1.8.*'
+          python3.8 -m pip install 'scipy!=1.6.*,!=1.7.*,!=1.8.*'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel

From 27315e78e74404a76f671af789a590f3ffeb585f Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 10 Jun 2022 14:02:51 -0400
Subject: [PATCH 30/31] CI: Try adding Cygwin job with SciPy <1.0

---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index 70461ef..c7e71e5 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -79,7 +79,7 @@ jobs:
           NPY_BLAS_LIBS: -lblas
           NPY_LAPACK_LIBS: -llapack -lblas
         run: |
-          python3.8 -m pip install 'scipy!=1.6.*,!=1.7.*,!=1.8.*'
+          python3.8 -m pip install 'scipy<1.0'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel

From 450dd860401b61d26b62a80d89768bb0a47a23ed Mon Sep 17 00:00:00 2001
From: DWesl <22566757+DWesl@users.noreply.github.com>
Date: Fri, 10 Jun 2022 16:32:52 -0400
Subject: [PATCH 31/31] CI: Try using SciPy 1.2

---
 .github/workflows/cygwin-python.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/cygwin-python.yml b/.github/workflows/cygwin-python.yml
index c7e71e5..7f32924 100644
--- a/.github/workflows/cygwin-python.yml
+++ b/.github/workflows/cygwin-python.yml
@@ -79,7 +79,7 @@ jobs:
           NPY_BLAS_LIBS: -lblas
           NPY_LAPACK_LIBS: -llapack -lblas
         run: |
-          python3.8 -m pip install 'scipy<1.0'
+          python3.8 -m pip install 'scipy<1.3'
           python3.8 -m pip install -r requirements.txt
           python3.8 -m pip install -r requirements-test.txt
       - name: Build wheel