Build system for statically-linked Python.

ports/python_static/build.sh

Index: ports/python_static/build.sh
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+#!/bin/bash
+# Copyright (c) 2014 The Native Client Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+EXECUTABLES=python${NACL_EXEEXT}
+
+# Currently this package only builds on linux.
+# The build relies on certain host binaries and python's configure
+# requires us to set --build= as well as --host=.
+#
+# The module downloader is patterned after the Bochs image downloading step.
+
+ConfigureStep() {
+  export CROSS_COMPILE=true
+  # We pre-seed configure with certain results that it cannot determine
+  # since we are doing a cross compile.  The $CONFIG_SITE file is sourced
+  # by configure early on.
+  export CONFIG_SITE=${START_DIR}/config.site
+  # Disable ipv6 since configure claims it requires a working getaddrinfo
+  # which we do not provide.  TODO(sbc): remove this once nacl_io supports
+  # getaddrinfo.
+  EXTRA_CONFIGURE_ARGS="--disable-ipv6"
+  EXTRA_CONFIGURE_ARGS+=" --with-suffix=${NACL_EXEEXT}"
+  EXTRA_CONFIGURE_ARGS+=" --build=i686-linux-gnu --disable-shared --enable-static"
+  export SO=.a
+  export MAKEFLAGS="PGEN=../build-nacl-host/Parser/pgen"
+  export LIBS="-ltermcap"
+  export DYNLOADFILE=dynload_ppapi.o
+  export MACHDEP=ppapi
+  export LINKCC=${NACLCXX}
+  LIBS+=" -lglibc-compat -lc"
+  LogExecute cp ${START_DIR}/dynload_ppapi.c ${NACL_PACKAGES_REPOSITORY}/${PACKAGE_DIR}/Python/
+  # This next step is costly, but it sets the environment variables correctly.
+  DefaultConfigureStep
+
+  local SRC_DIR=${NACL_PACKAGES_REPOSITORY}/${PACKAGE_DIR}
+  LogExecute cp ${START_DIR}/Setup.local Modules/
+  cat ${DEST_PYTHON_OBJS}/*.list >> Modules/Setup.local
+  PY_MOD_LIBS=""
+  for MODFILE in ${DEST_PYTHON_OBJS}/*.libs ; do
+    source ${MODFILE}

[Kester Tong, 2014/01/29 20:38:47]

in the case that the glob ${DEST_PYTHON_OBJS}/*.libs has zero matches, bash will
call source ${DEST_PYTHON_OBJS}/*.libs resulting in an error.  The easiest fix
for this is to check that MODFILE exists, so that

    source ${MODFILE}

is replaced by

    if [ -e ${MODFILE} ]; then
      source ${MODFILE}
    fi

[Matthew Turk, 2014/01/31 15:56:57]

Done.

+  done
+  LogExecute rm -vf libpython2.7.a
+  PY_LINK_LINE+="ppapi_simple ${DEST_PYTHON_OBJS}/\*.o"
+  PY_LINK_LINE+=" ${PY_MOD_LIBS} -lz -lppapi -lppapi_cpp -lnacl"
+  PY_LINK_LINE+=" -lnacl_io -lc -lglibc-compat"
+  echo ${PY_LINK_LINE} >> Modules/Setup.local
+  # At this point we use the existing environment variables from
+  # DefaultConfigureStep to build our destination Python modules
+}
+
+BuildStep() {
+  DefaultBuildStep
+  ChangeDir ${NACL_PACKAGES_REPOSITORY}/${PACKAGE_DIR}/${NACL_BUILD_SUBDIR}
+  Banner "Rebuilding libpython2.7.a"
+  ${AR} cr libpython2.7.a ${DEST_PYTHON_OBJS}/*.o
+  ${RANLIB} libpython2.7.a
+  # To avoid rebuilding python.nexe with the new libpython2.7.a and duplicating
+  # symbols
+  LogExecute touch python${NACL_EXEEXT}
+  # The modules get built with SO=so, but they need to be SO=a inside the
+  # destination filesystem.
+  for fn in `find ${NACL_DEST_PYROOT}/${SITE_PACKAGES} -name "*.so"`
+  do
+    LogExecute touch ${fn%%so}a
+    LogExecute rm -v ${fn}
+  done
+}