Drop CPython 3.6

Author: mayeut

README.rst

@@ -230,7 +230,7 @@ Image content
 
 All supported images currently contain:
 
-- CPython 3.6, 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t and PyPy 3.7, 3.8, 3.9, 3.10 installed in
+- CPython 3.7, 3.8, 3.9, 3.10, 3.11, 3.12, 3.13, 3.13t and PyPy 3.7, 3.8, 3.9, 3.10 installed in
   ``/opt/python/<python tag>-<abi tag>``. The directories are named
   after the PEP 425 tags for each environment --
   e.g. ``/opt/python/cp37-cp37m`` contains a CPython 3.7 build, and

docker/Dockerfile

@@ -122,10 +122,6 @@ RUN export OPENSSL_ROOT=openssl-3.0.15 && \
     manylinux-entrypoint /build_scripts/build-openssl.sh
 
 
-FROM build_cpython_system_ssl AS build_cpython36
-COPY build_scripts/cpython-pubkeys.txt /build_scripts/cpython-pubkeys.txt
-RUN manylinux-entrypoint /build_scripts/build-cpython.sh 3.6.15
-
 FROM build_cpython_system_ssl AS build_cpython37
 COPY build_scripts/cpython-pubkeys.txt /build_scripts/cpython-pubkeys.txt
 RUN manylinux-entrypoint /build_scripts/build-cpython.sh 3.7.17
@@ -165,8 +161,7 @@ COPY --from=build_mpdecimal /manylinux-rootfs /
 COPY --from=build_sqlite3 /manylinux-rootfs /
 COPY --from=build_git /manylinux-rootfs /
 COPY build_scripts /opt/_internal/build_scripts/
-RUN --mount=type=bind,target=/build_cpython36,from=build_cpython36 \
-    --mount=type=bind,target=/build_cpython37,from=build_cpython37 \
+RUN --mount=type=bind,target=/build_cpython37,from=build_cpython37 \
     --mount=type=bind,target=/build_cpython38,from=build_cpython38 \
     --mount=type=bind,target=/build_cpython39,from=build_cpython39 \
     --mount=type=bind,target=/build_cpython310,from=build_cpython310 \

docker/build_scripts/build-cpython.sh

@@ -40,11 +40,6 @@ if [ "${2:-}" == "nogil" ]; then
 	CONFIGURE_ARGS="${CONFIGURE_ARGS} --disable-gil"
 fi
 
-if [ "${CPYTHON_VERSION}" == "3.6.15" ]; then
-	# https://github.com/python/cpython/issues/89863
-	# gcc-12+ uses these 2 flags in -O2 but they were only enabled in -O3 with gcc-11
-	CFLAGS_EXTRA="${CFLAGS_EXTRA} -fno-tree-loop-vectorize -fno-tree-slp-vectorize"
-fi
 if [ "${AUDITWHEEL_POLICY}" == "manylinux2014" ] ; then
 	# Python 3.11+
 	export TCLTK_LIBS="-ltk8.6 -ltcl8.6"

docker/build_scripts/requirements3.6.txt

@@ -3,6 +3,6 @@
 setup(
     name="forty_two",
     version="0.1.0",
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     ext_modules=[Extension("forty_two", sources=["forty-two.c"])],
 )

tests/forty-two/setup.py

@@ -7,18 +7,18 @@ set -exuo pipefail
 MY_DIR=$(dirname "${BASH_SOURCE[0]}")
 
 if [ "${AUDITWHEEL_POLICY:0:10}" == "musllinux_" ]; then
-	EXPECTED_PYTHON_COUNT=9
-	EXPECTED_PYTHON_COUNT_ALL=9
+	EXPECTED_PYTHON_COUNT=8
+	EXPECTED_PYTHON_COUNT_ALL=8
 else
 	if [ "${AUDITWHEEL_ARCH}" == "x86_64" ] || [ "${AUDITWHEEL_ARCH}" == "aarch64" ]; then
-		EXPECTED_PYTHON_COUNT=10
-		EXPECTED_PYTHON_COUNT_ALL=14
-	elif [ "${AUDITWHEEL_ARCH}" == "i686" ]; then
-		EXPECTED_PYTHON_COUNT=10
+		EXPECTED_PYTHON_COUNT=9
 		EXPECTED_PYTHON_COUNT_ALL=13
-	else
+	elif [ "${AUDITWHEEL_ARCH}" == "i686" ]; then
 		EXPECTED_PYTHON_COUNT=9
-		EXPECTED_PYTHON_COUNT_ALL=9
+		EXPECTED_PYTHON_COUNT_ALL=12
+	else
+		EXPECTED_PYTHON_COUNT=8
+		EXPECTED_PYTHON_COUNT_ALL=8
 	fi
 fi
 
@@ -97,7 +97,7 @@ for PYTHON in /opt/python/*/bin/python; do
 		echo "invalid answer, expecting 42"
 		exit 1
 	fi
-	if [ "${PYVERS}" != "3.6" ] && [ "${PYVERS}" != "3.7" ] && [ "${IMPLEMENTATION}" != "graalpy" ] && [ "${AUDITWHEEL_POLICY:0:9}_${AUDITWHEEL_ARCH}" != "musllinux_s390x" ] && [ "${AUDITWHEEL_ARCH}" != "riscv64" ]; then
+	if [ "${PYVERS}" != "3.7" ] && [ "${IMPLEMENTATION}" != "graalpy" ] && [ "${AUDITWHEEL_POLICY:0:9}_${AUDITWHEEL_ARCH}" != "musllinux_s390x" ] && [ "${AUDITWHEEL_ARCH}" != "riscv64" ]; then
 		# no uv on musllinux s390x
 		UV_PYTHON=/tmp/uv-test-${IMPLEMENTATION}${PYVERS}/bin/python
 		uv venv --python ${PYTHON} /tmp/uv-test-${IMPLEMENTATION}${PYVERS}