Remove deprecated oldest-supported-numpy from pyproject.toml.

.github/workflows/docs.yml

@@ -30,7 +30,7 @@ jobs:
           channels: conda-forge
           miniforge-variant: Mambaforge
       - name: Install basic dependencies
-        run: mamba install -y -v lapack "libblas=*=*netlib" "cython>=0.29.28" "ipopt=${{ matrix.ipopt-version }}" numpy>=1.21.5 pkg-config>=0.29.2 setuptools>=44.1.1 --file docs/requirements.txt
+        run: mamba install -y -v lapack "libblas=*=*netlib" "cython>=0.29.28" "ipopt=${{ matrix.ipopt-version }}" numpy>=1.25 pkg-config>=0.29.2 setuptools>=44.1.1 --file docs/requirements.txt
       - name: Install CyIpopt
         run: |
           rm pyproject.toml

.github/workflows/tests.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.9', '3.10', '3.11', '3.12']
         ipopt-version: ['3.12', '3.13', '3.14']
         exclude:
           - os: windows-latest
@@ -35,7 +35,7 @@ jobs:
           miniforge-variant: Mambaforge
       - name: Install basic dependencies against generic blas/lapack
         run: |
-          mamba install -q -y lapack "libblas=*=*netlib" "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.21.5" "pkg-config>=0.29.2" "setuptools>=44.1.1" "cython>=0.29.28"
+          mamba install -q -y lapack "libblas=*=*netlib" "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.25" "pkg-config>=0.29.2" "setuptools>=44.1.1" "cython>=0.29.28"
       - run: echo "IPOPTWINDIR=USECONDAFORGEIPOPT" >> $GITHUB_ENV
       - name: Install CyIpopt
         run: |
@@ -46,7 +46,7 @@ jobs:
         run: |
           python -c "import cyipopt"
           mamba remove lapack
-          mamba install -q -y "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.21.5" "pkg-config>=0.29.2" "setuptools>=44.1.1" "pytest>=6.2.5" "cython=0.29.*"
+          mamba install -q -y "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.25" "pkg-config>=0.29.2" "setuptools>=44.1.1" "pytest>=6.2.5" "cython=0.29.*"
           mamba list
           pytest
       - name: Test with pytest and scipy, new ipopt
@@ -55,6 +55,6 @@ jobs:
         # Ipopt needed different libfortrans.
         if: (matrix.ipopt-version != '3.12' && matrix.python-version != '3.11') || (matrix.ipopt-version != '3.12' && matrix.python-version != '3.10' && matrix.os != 'macos-latest')
         run: |
-          mamba install -q -y -c conda-forge "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.21.5" "pkg-config>=0.29.2" "setuptools>=44.1.1" "scipy>1.8.0" "pytest>=6.2.5" "cython=0.29.*"
+          mamba install -q -y -c conda-forge "ipopt=${{ matrix.ipopt-version }}" "numpy>=1.25" "pkg-config>=0.29.2" "setuptools>=44.1.1" "scipy>1.8.0" "pytest>=6.2.5" "cython=0.29.*"
           mamba list
           pytest

.github/workflows/windows.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/setup-python@v4
         with:
           python-version: '3.10'
-      - run: python -m pip install "numpy>=1.21.5" "cython>=0.29.28" "setuptools>44.1.1"
+      - run: python -m pip install "numpy>=1.25" "cython>=0.29.28" "setuptools>44.1.1"
       - run: Invoke-WebRequest -Uri "https://github.com/coin-or/Ipopt/releases/download/releases%2F3.13.3/Ipopt-3.13.3-win64-msvs2019-md.zip" -OutFile "Ipopt-3.13.3-win64-msvs2019-md.zip"
       - run: 7z x Ipopt-3.13.3-win64-msvs2019-md.zip
       - run: mv Ipopt-3.13.3-win64-msvs2019-md/* .

CHANGELOG.rst

@@ -39,6 +39,12 @@ Version History
 [1.5.0.dev0] - XXXX-XX-XX
 ~~~~~~~~~~~~~~~~~~~~~~~~~
 
+Changed
++++++++
+
+- Dropped support for Python 3.8. #263
+- Dropped support for building the package with NumPy < 1.25. #263
+
 [1.4.1] - 2024-04-02
 ~~~~~~~~~~~~~~~~~~~~
 

docs/source/install.rst

@@ -29,10 +29,10 @@ dependencies:
   * C/C++ compiler
   * pkg-config [only for Linux and Mac]
   * Ipopt >=3.12 [>= 3.13 on Windows]
-  * Python 3.8+
+  * Python 3.9+
   * setuptools >=44.1.1
   * cython >=0.29.28
-  * NumPy >=1.21.5
+  * NumPy >=1.25
   * SciPy >=1.8 [optional]
 
 The binaries and header files of the Ipopt package can be obtained from

pyproject.toml

@@ -1,3 +1,3 @@
 [build-system]
-requires = ["cython>=0.29.28", "oldest-supported-numpy","setuptools>=44.1.1"]
+requires = ["cython>=0.29.28", "numpy>=1.25","setuptools>=44.1.1"]
 build-backend = "setuptools.build_meta"

setup.py

@@ -18,10 +18,15 @@
 from setuptools.extension import Extension
 
 # install requirements before import
+# NOTE : NumPy 1.25 is the first release of NumPy that you can link to the
+# NumPy C-API and it will be guaranteed to be backward compatible back to NumPy
+# 1.19, thus we set the minimum NumPy build version to 1.25. See:
+# https://numpy.org/doc/stable/dev/depending_on_numpy.html#adding-a-dependency-on-numpy
+# for more information.
 from setuptools import dist
 SETUP_REQUIRES = [
     "cython>=0.29.28",
-    "numpy>=1.21.5",
+    "numpy>=1.25",
     "setuptools>=44.1.1",
 ]
 dist.Distribution().fetch_build_eggs(SETUP_REQUIRES)
@@ -57,7 +62,6 @@
     "License :: OSI Approved :: Eclipse Public License 2.0 (EPL-2.0)",
     "Intended Audience :: Science/Research",
     "Operating System :: OS Independent",
-    "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
     "Programming Language :: Python :: 3.11",