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bpo-45950: Introduce Bootstrap Python again (#29859)

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The build system now uses a :program:`_bootstrap_python` interpreter for
freezing and deepfreezing again. To speed up build process the build tools
:program:`_bootstrap_python` and :program:`_freeze_module` are no longer
build with LTO.

Cross building depends on a build Python interpreter, which must have same
version and bytecode as target host Python.
This commit is contained in:
Christian Heimes 2021-12-03 17:01:11 +02:00 • committed by GitHub
parent ccb73a0d50
commit 84ca1232b0
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GPG key ID: 4AEE18F83AFDEB23
9 changed files with 185 additions and 71 deletions
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15
configure.ac
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@ -143,8 +143,9 @@ AC_ARG_WITH(
if test "$build_python_ver" != "$PACKAGE_VERSION"; then
AC_MSG_ERROR(["$with_build_python" has incompatible version $build_python_ver (expected: $PACKAGE_VERSION)])
fi
dnl use build Python for regeneration, too
dnl Build Python interpreter is used for regeneration and freezing.
ac_cv_prog_PYTHON_FOR_REGEN=$with_build_python
PYTHON_FOR_FREEZE="$with_build_python"
PYTHON_FOR_BUILD='_PYTHON_PROJECT_BASE=$(abs_builddir) _PYTHON_HOST_PLATFORM=$(_PYTHON_HOST_PLATFORM) PYTHONPATH=$(shell test -f pybuilddir.txt && echo $(abs_builddir)/`cat pybuilddir.txt`:)$(srcdir)/Lib _PYTHON_SYSCONFIGDATA_NAME=_sysconfigdata_$(ABIFLAGS)_$(MACHDEP)_$(MULTIARCH) '$with_build_python
AC_MSG_RESULT([$with_build_python])
], [
@ -152,17 +153,22 @@ AC_ARG_WITH(
[AC_MSG_ERROR([Cross compiling requires --with-build-python])]
)
PYTHON_FOR_BUILD='./$(BUILDPYTHON) -E'
PYTHON_FOR_FREEZE="./_bootstrap_python"
]
)
AC_SUBST([PYTHON_FOR_BUILD])
AC_MSG_CHECKING([for Python interpreter freezing])
AC_MSG_RESULT([$PYTHON_FOR_FREEZE])
AC_SUBST([PYTHON_FOR_FREEZE])
AC_CHECK_PROGS([PYTHON_FOR_REGEN],
[python$PACKAGE_VERSION python3.10 python3.9 python3.8 python3.7 python3.6 python3 python],
[python3])
AC_SUBST(PYTHON_FOR_REGEN)
AC_MSG_CHECKING([Python for regen version])
if command -v $PYTHON_FOR_REGEN >/dev/null 2>&1; then
if command -v "$PYTHON_FOR_REGEN" >/dev/null 2>&1; then
AC_MSG_RESULT([$($PYTHON_FOR_REGEN -V 2>/dev/null)])
else
AC_MSG_RESULT([missing])
@ -1510,6 +1516,8 @@ esac
if test "$Py_LTO" = 'true' ; then
case $CC in
*clang*)
dnl flag to disable lto during linking
LDFLAGS_NOLTO="-fno-lto"
AC_SUBST(LLVM_AR)
AC_PATH_TOOL(LLVM_AR, llvm-ar, '', ${llvm_path})
AC_SUBST(LLVM_AR_FOUND)
@ -1565,6 +1573,8 @@ if test "$Py_LTO" = 'true' ; then
then
AC_MSG_ERROR([thin lto is not supported under gcc compiler.])
fi
dnl flag to disable lto during linking
LDFLAGS_NOLTO="-fno-lto"
case $ac_sys_system in
Darwin*)
LTOFLAGS="-flto -Wl,-export_dynamic"
@ -1746,6 +1756,7 @@ fi
AC_SUBST(BASECFLAGS)
AC_SUBST(CFLAGS_NODIST)
AC_SUBST(LDFLAGS_NODIST)
AC_SUBST(LDFLAGS_NOLTO)
# The -arch flags for universal builds on macOS
UNIVERSAL_ARCH_FLAGS=