Add ppc64le power9, power10, and power11 optimized build targets

ci-targets.yaml

@@ -142,6 +142,71 @@ linux:
           - freethreaded+lto
         minimum-python-version: "3.13"
 
+  ppc64le_power9-unknown-linux-gnu:
+    arch: ppc64le
+    arch_variant: power9
+    libc: gnu
+    python_versions:
+      - "3.10"
+      - "3.11"
+      - "3.12"
+      - "3.13"
+      - "3.14"
+      - "3.15"
+    build_options:
+      - debug
+      - noopt
+      - lto
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
+  ppc64le_power10-unknown-linux-gnu:
+    arch: ppc64le
+    arch_variant: power10
+    libc: gnu
+    python_versions:
+      - "3.10"
+      - "3.11"
+      - "3.12"
+      - "3.13"
+      - "3.14"
+      - "3.15"
+    build_options:
+      - debug
+      - noopt
+      - lto
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
+
+  ppc64le_power11-unknown-linux-gnu:
+    arch: ppc64le
+    arch_variant: power11
+    libc: gnu
+    python_versions:
+      - "3.10"
+      - "3.11"
+      - "3.12"
+      - "3.13"
+      - "3.14"
+      - "3.15"
+    build_options:
+      - debug
+      - noopt
+      - lto
+    build_options_conditional:
+      - options:
+          - freethreaded+debug
+          - freethreaded+noopt
+          - freethreaded+lto
+        minimum-python-version: "3.13"
+
   riscv64-unknown-linux-gnu:
     arch: riscv64
     libc: gnu

cpython-unix/build.cross-ppc64le_power10.Dockerfile

@@ -0,0 +1,55 @@
+# Debian Bookworm (ships GCC 12, which supports -mcpu=power10).
+FROM debian@sha256:6bc30d909583f38600edd6609e29eb3fb284ab8affce8d0389f332fc91c2dd91
+LABEL org.opencontainers.image.authors="Gregory Szorc <gregory.szorc@gmail.com>"
+
+RUN groupadd -g 1000 build && \
+    useradd -u 1000 -g 1000 -d /build -s /bin/bash -m build && \
+    mkdir /tools && \
+    chown -R build:build /build /tools
+
+ENV HOME=/build \
+    SHELL=/bin/bash \
+    USER=build \
+    LOGNAME=build \
+    HOSTNAME=builder \
+    DEBIAN_FRONTEND=noninteractive
+
+CMD ["/bin/bash", "--login"]
+WORKDIR '/build'
+
+RUN for s in debian_bookworm debian_bookworm-updates debian-security_bookworm-security/updates; do \
+      echo "deb http://snapshot.debian.org/archive/${s%_*}/20250601T000000Z/ ${s#*_} main"; \
+    done > /etc/apt/sources.list && \
+    ( echo 'quiet "true";'; \
+      echo 'APT::Get::Assume-Yes "true";'; \
+      echo 'APT::Install-Recommends "false";'; \
+      echo 'Acquire::Check-Valid-Until "false";'; \
+      echo 'Acquire::Retries "5";'; \
+    ) > /etc/apt/apt.conf.d/99cpython-portable && \
+    rm -f /etc/apt/sources.list.d/*
+
+RUN apt-get update
+
+# Host building.
+RUN apt-get install \
+    bzip2 \
+    ca-certificates \
+    gcc \
+    g++ \
+    libc6-dev \
+    libffi-dev \
+    make \
+    patch \
+    perl \
+    pkg-config \
+    tar \
+    xz-utils \
+    unzip \
+    zip \
+    zlib1g-dev
+
+# Cross-building (powerpc64le only — GCC 12 supports -mcpu=power10).
+RUN apt-get install \
+    g++-powerpc64le-linux-gnu \
+    gcc-powerpc64le-linux-gnu \
+    libc6-dev-ppc64el-cross

cpython-unix/build.cross-ppc64le_power11.Dockerfile

@@ -0,0 +1,55 @@
+# Debian Bookworm (ships GCC 12, which supports -mcpu=power10 and -mcpu=power11).
+FROM debian@sha256:6bc30d909583f38600edd6609e29eb3fb284ab8affce8d0389f332fc91c2dd91
+LABEL org.opencontainers.image.authors="Gregory Szorc <gregory.szorc@gmail.com>"
+
+RUN groupadd -g 1000 build && \
+    useradd -u 1000 -g 1000 -d /build -s /bin/bash -m build && \
+    mkdir /tools && \
+    chown -R build:build /build /tools
+
+ENV HOME=/build \
+    SHELL=/bin/bash \
+    USER=build \
+    LOGNAME=build \
+    HOSTNAME=builder \
+    DEBIAN_FRONTEND=noninteractive
+
+CMD ["/bin/bash", "--login"]
+WORKDIR '/build'
+
+RUN for s in debian_bookworm debian_bookworm-updates debian-security_bookworm-security/updates; do \
+      echo "deb http://snapshot.debian.org/archive/${s%_*}/20250601T000000Z/ ${s#*_} main"; \
+    done > /etc/apt/sources.list && \
+    ( echo 'quiet "true";'; \
+      echo 'APT::Get::Assume-Yes "true";'; \
+      echo 'APT::Install-Recommends "false";'; \
+      echo 'Acquire::Check-Valid-Until "false";'; \
+      echo 'Acquire::Retries "5";'; \
+    ) > /etc/apt/apt.conf.d/99cpython-portable && \
+    rm -f /etc/apt/sources.list.d/*
+
+RUN apt-get update
+
+# Host building.
+RUN apt-get install \
+    bzip2 \
+    ca-certificates \
+    gcc \
+    g++ \
+    libc6-dev \
+    libffi-dev \
+    make \
+    patch \
+    perl \
+    pkg-config \
+    tar \
+    xz-utils \
+    unzip \
+    zip \
+    zlib1g-dev
+
+# Cross-building (powerpc64le only — GCC 12 supports -mcpu=power10 and -mcpu=power11).
+RUN apt-get install \
+    g++-powerpc64le-linux-gnu \
+    gcc-powerpc64le-linux-gnu \
+    libc6-dev-ppc64el-cross

cpython-unix/build.py

@@ -112,6 +112,9 @@ def add_target_env(env, build_platform, target_triple, build_env, build_options)
             target_triple.replace("x86_64_v2-", "x86_64-")
             .replace("x86_64_v3-", "x86_64-")
             .replace("x86_64_v4-", "x86_64-")
+            .replace("ppc64le_power9-", "ppc64le-")
+            .replace("ppc64le_power10-", "ppc64le-")
+            .replace("ppc64le_power11-", "ppc64le-")
         )
 
         # On macOS, we support building Linux in a virtualized container that

cpython-unix/targets.yml

@@ -503,6 +503,172 @@ ppc64le-unknown-linux-gnu:
     - zstd
   openssl_target: linux-ppc64le
 
+ppc64le_power9-unknown-linux-gnu:
+  linux_uapi_include_arch: powerpc64le-linux-gnu
+  host_platforms:
+    - linux_x86_64
+  pythons_supported:
+    - '3.10'
+    - '3.11'
+    - '3.12'
+    - '3.13'
+    - '3.14'
+    - '3.15'
+  docker_image_suffix: .cross
+  host_cc: /usr/bin/x86_64-linux-gnu-gcc
+  host_cxx: /usr/bin/x86_64-linux-gnu-g++
+  target_cc: /usr/bin/powerpc64le-linux-gnu-gcc
+  target_cxx: /usr/bin/powerpc64le-linux-gnu-g++
+  target_cflags:
+    # Hardening
+    - '-fstack-protector'
+    - '-U_FORTIFY_SOURCE'
+    - '-D_FORTIFY_SOURCE=2'
+    - '-mcpu=power9'
+    - '-mtune=power9'
+  target_ldflags:
+    # Hardening
+    - '-Wl,-z,noexecstack'
+    - '-Wl,-z,relro'
+    - '-Wl,-z,now'
+  needs:
+    - autoconf
+    - bdb
+    - binutils
+    - bzip2
+    - expat
+    - libedit
+    - libffi
+    - libX11
+    - libXau
+    - libxcb
+    - linux-uapi
+    - m4
+    - mpdecimal
+    - ncurses
+    - openssl-3.5
+    - patchelf
+    - sqlite
+    - tcl
+    - tk
+    - uuid
+    - xorgproto
+    - xz
+    - zlib
+    - zstd
+  openssl_target: linux-ppc64le
+
+
+ppc64le_power10-unknown-linux-gnu:
+  linux_uapi_include_arch: powerpc64le-linux-gnu
+  host_platforms:
+    - linux_x86_64
+  pythons_supported:
+    - '3.10'
+    - '3.11'
+    - '3.12'
+    - '3.13'
+    - '3.14'
+    - '3.15'
+  docker_image_suffix: .cross-ppc64le_power10
+  host_cc: /usr/bin/x86_64-linux-gnu-gcc
+  host_cxx: /usr/bin/x86_64-linux-gnu-g++
+  target_cc: /usr/bin/powerpc64le-linux-gnu-gcc
+  target_cxx: /usr/bin/powerpc64le-linux-gnu-g++
+  target_cflags:
+    # Hardening
+    - '-fstack-protector'
+    - '-U_FORTIFY_SOURCE'
+    - '-D_FORTIFY_SOURCE=2'
+    - '-mcpu=power10'
+    - '-mtune=power10'
+  target_ldflags:
+    # Hardening
+    - '-Wl,-z,noexecstack'
+    - '-Wl,-z,relro'
+    - '-Wl,-z,now'
+  needs:
+    - autoconf
+    - bdb
+    - binutils
+    - bzip2
+    - expat
+    - libedit
+    - libffi
+    - libX11
+    - libXau
+    - libxcb
+    - linux-uapi
+    - m4
+    - mpdecimal
+    - ncurses
+    - openssl-3.5
+    - patchelf
+    - sqlite
+    - tcl
+    - tk
+    - uuid
+    - xorgproto
+    - xz
+    - zlib
+    - zstd
+  openssl_target: linux-ppc64le
+
+ppc64le_power11-unknown-linux-gnu:
+  linux_uapi_include_arch: powerpc64le-linux-gnu
+  host_platforms:
+    - linux_x86_64
+  pythons_supported:
+    - '3.10'
+    - '3.11'
+    - '3.12'
+    - '3.13'
+    - '3.14'
+    - '3.15'
+  docker_image_suffix: .cross-ppc64le_power11
+  host_cc: /usr/bin/x86_64-linux-gnu-gcc
+  host_cxx: /usr/bin/x86_64-linux-gnu-g++
+  target_cc: /usr/bin/powerpc64le-linux-gnu-gcc
+  target_cxx: /usr/bin/powerpc64le-linux-gnu-g++
+  target_cflags:
+    # Hardening
+    - '-fstack-protector'
+    - '-U_FORTIFY_SOURCE'
+    - '-D_FORTIFY_SOURCE=2'
+    - '-mcpu=power11'
+    - '-mtune=power11'
+  target_ldflags:
+    # Hardening
+    - '-Wl,-z,noexecstack'
+    - '-Wl,-z,relro'
+    - '-Wl,-z,now'
+  needs:
+    - autoconf
+    - bdb
+    - binutils
+    - bzip2
+    - expat
+    - libedit
+    - libffi
+    - libX11
+    - libXau
+    - libxcb
+    - linux-uapi
+    - m4
+    - mpdecimal
+    - ncurses
+    - openssl-3.5
+    - patchelf
+    - sqlite
+    - tcl
+    - tk
+    - uuid
+    - xorgproto
+    - xz
+    - zlib
+    - zstd
+  openssl_target: linux-ppc64le
+
 riscv64-unknown-linux-gnu:
   linux_uapi_include_arch: riscv64-linux-gnu
   host_platforms:

docs/running.rst

@@ -80,6 +80,14 @@ familiar with LLVM target triples, here is an overview:
 ``i686-unknown-linux-*``
    Linux 32-bit Intel/AMD CPUs.
 
+``ppc64le-unknown-linux-gnu``
+   Linux on 64-bit little-endian PowerPC (ELFv2 ABI baseline).
+
+``ppc64le_power9-unknown-linux-gnu``
+   Linux on 64-bit little-endian PowerPC optimized for POWER9.
+
+   Compiled with ``-mcpu=power9 -mtune=power9``.
+
 ``x86_64_v2-*``
    Targets 64-bit Intel/AMD CPUs approximately newer than
    `Nehalem <https://en.wikipedia.org/wiki/Nehalem_(microarchitecture)>`_