config/python.m4 - cloudberry - Git at Google

 #
 # Autoconf macros for configuring the build of Python extension modules
 #
 # config/python.m4
 #

 # PGAC_PATH_PYTHON
 # ----------------
 # Look for Python and set the output variable 'PYTHON' if found,
 # fail otherwise.
 #
 # As the Python 3 transition happens and PEP 394 isn't updated, we
 # need to cater to systems that don't have unversioned "python" by
 # default.  Some systems ship with "python3" by default and perhaps
 # have "python" in an optional package.  Some systems only have
 # "python2" and "python3", in which case it's reasonable to prefer the
 # newer version.
 AC_DEFUN([PGAC_PATH_PYTHON],
 [PGAC_PATH_PROGS(PYTHON, [python3 python])
 AC_ARG_VAR(PYTHON, [Python program])dnl
 if test x"$PYTHON" = x""; then
   AC_MSG_ERROR([Python not found])
 fi
 ])


 # _PGAC_CHECK_PYTHON_DIRS
 # -----------------------
 # Determine the name of various directories of a given Python installation,
 # as well as the Python version.
 AC_DEFUN([_PGAC_CHECK_PYTHON_DIRS],
 [AC_REQUIRE([PGAC_PATH_PYTHON])
 python_fullversion=`${PYTHON} -c "import sys; print(sys.version)" | sed q`
 AC_MSG_NOTICE([using python $python_fullversion])
 # python_fullversion is typically n.n.n plus some trailing junk
 python_majorversion=`echo "$python_fullversion" | sed '[s/^\([0-9]*\).*/\1/]'`
 python_minorversion=`echo "$python_fullversion" | sed '[s/^[0-9]*\.\([0-9]*\).*/\1/]'`
 python_version=`echo "$python_fullversion" | sed '[s/^\([0-9]*\.[0-9]*\).*/\1/]'`
 # Reject unsupported Python versions as soon as practical.
 if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 7; then
   AC_MSG_ERROR([Python version $python_version is too old (version 2.7 or later is required)])
 fi

 AC_MSG_CHECKING([for Python sysconfig module])
 if "${PYTHON}" -c 'import sysconfig' 2>&AS_MESSAGE_LOG_FD
 then
     AC_MSG_RESULT(yes)
 else
     AC_MSG_RESULT(no)
     AC_MSG_ERROR([sysconfig module not found])
 fi

 AC_MSG_CHECKING([Python configuration directory])
 python_configdir=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBPL'))))"`
 AC_MSG_RESULT([$python_configdir])

 AC_MSG_CHECKING([Python include directory])
 python_includespec=`${PYTHON} -c "import sysconfig; print('-I' + sysconfig.get_config_var('INCLUDEPY'))"`
 if test "$PORTNAME" = win32 ; then
     python_includespec=`echo $python_includespec | sed 's,[[\]],/,g'`
 fi
 AC_MSG_RESULT([$python_includespec])

 AC_SUBST(python_majorversion)[]dnl
 AC_SUBST(python_version)[]dnl
 AC_SUBST(python_includespec)[]dnl
 ])# _PGAC_CHECK_PYTHON_DIRS


 # PGAC_CHECK_PYTHON_EMBED_SETUP
 # -----------------------------
 #
 # Set python_libdir to the path of the directory containing the Python shared
 # library.  Set python_libspec to the -L/-l linker switches needed to link it.
 # Set python_additional_libs to contain any additional linker switches needed
 # for subsidiary libraries.
 #
 # In modern, well-configured Python installations, LIBDIR gives the correct
 # directory name and LDLIBRARY is the file name of the shlib.  But in older
 # installations LDLIBRARY is frequently a useless path fragment, and it's also
 # possible that the shlib is in a standard library directory such as /usr/lib
 # so that LIBDIR is irrelevant.  Also, some packagers put the .so symlink for
 # the shlib in ${python_configdir} even though Python itself never does.
 # We must also check that what we found is a shared library not a plain
 # library, which we do by checking its extension.  (We used to rely on
 # Py_ENABLE_SHARED, but that only tells us that a shlib exists, not that
 # we found it.)
 AC_DEFUN([PGAC_CHECK_PYTHON_EMBED_SETUP],
 [AC_REQUIRE([_PGAC_CHECK_PYTHON_DIRS])
 AC_MSG_CHECKING([how to link an embedded Python application])

 python_libdir=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBDIR'))))"`
 python_ldlibrary=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LDLIBRARY'))))"`

 # If LDLIBRARY exists and has a shlib extension, use it verbatim.
 ldlibrary=`echo "${python_ldlibrary}" | sed -e 's/\.so$//' -e 's/\.dll$//' -e 's/\.dylib$//' -e 's/\.sl$//'`
 if test -e "${python_libdir}/${python_ldlibrary}" -a x"${python_ldlibrary}" != x"${ldlibrary}"
 then
 	ldlibrary=`echo "${ldlibrary}" | sed "s/^lib//"`
 	found_shlib=1
 else
 	# Otherwise, guess the base name of the shlib.
 	# LDVERSION was added in Python 3.2, before that use VERSION,
 	# or failing that, $python_version from _PGAC_CHECK_PYTHON_DIRS.
 	python_ldversion=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LDVERSION'))))"`
 	if test x"${python_ldversion}" != x""; then
 		ldlibrary="python${python_ldversion}"
 	else
 		python_version_var=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('VERSION'))))"`
 		if test x"${python_version_var}" != x""; then
 			ldlibrary="python${python_version_var}"
 		else
 			ldlibrary="python${python_version}"
 		fi
 	fi
 	# Search for a likely-looking file.
 	found_shlib=0
 	for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
 	do
 		# We don't know the platform DLSUFFIX here, so check 'em all.
 		for e in .so .dll .dylib .sl; do
 			if test -e "$d/lib${ldlibrary}$e"; then
 				python_libdir="$d"
 				found_shlib=1
 				break 2
 			fi
 		done
 	done
 	# Some platforms (OpenBSD) require us to accept a bare versioned shlib
 	# (".so.n.n") as well. However, check this only after failing to find
 	# ".so" anywhere, because yet other platforms (Debian) put the .so
 	# symlink in a different directory from the underlying versioned shlib.
 	if test "$found_shlib" != 1; then
 		for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
 		do
 			for f in "$d/lib${ldlibrary}.so."* ; do
 				if test -e "$f"; then
 					python_libdir="$d"
 					found_shlib=1
 					break 2
 				fi
 			done
 		done
 	fi
 	# As usual, Windows has its own ideas.  Possible default library
 	# locations include c:/Windows/System32 and (for Cygwin) /usr/bin,
 	# and the "lib" prefix might not be there.
 	if test "$found_shlib" != 1 -a \( "$PORTNAME" = win32 -o "$PORTNAME" = cygwin \); then
 		for d in "${python_libdir}" "${python_configdir}" c:/Windows/System32 /usr/bin
 		do
 			for f in "$d/lib${ldlibrary}.dll" "$d/${ldlibrary}.dll" ; do
 				if test -e "$f"; then
 					python_libdir="$d"
 					found_shlib=1
 					break 2
 				fi
 			done
 		done
 	fi
 fi
 if test "$found_shlib" != 1; then
 	AC_MSG_ERROR([could not find shared library for Python
 You might have to rebuild your Python installation.  Refer to the
 documentation for details.  Use --without-python to disable building
 PL/Python.])
 fi
 python_libspec="-L${python_libdir} -l${ldlibrary}"

 python_additional_libs=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBS','LIBC','LIBM','BASEMODLIBS'))))"`

 AC_MSG_RESULT([${python_libspec} ${python_additional_libs}])

 AC_SUBST(python_libdir)[]dnl
 AC_SUBST(python_libspec)[]dnl
 AC_SUBST(python_additional_libs)[]dnl

 ])# PGAC_CHECK_PYTHON_EMBED_SETUP
	#
	# Autoconf macros for configuring the build of Python extension modules
	#
	# config/python.m4
	#

	# PGAC_PATH_PYTHON
	# ----------------
	# Look for Python and set the output variable 'PYTHON' if found,
	# fail otherwise.
	#
	# As the Python 3 transition happens and PEP 394 isn't updated, we
	# need to cater to systems that don't have unversioned "python" by
	# default. Some systems ship with "python3" by default and perhaps
	# have "python" in an optional package. Some systems only have
	# "python2" and "python3", in which case it's reasonable to prefer the
	# newer version.
	AC_DEFUN([PGAC_PATH_PYTHON],
	[PGAC_PATH_PROGS(PYTHON, [python3 python])
	AC_ARG_VAR(PYTHON, [Python program])dnl
	if test x"$PYTHON" = x""; then
	AC_MSG_ERROR([Python not found])
	fi
	])


	# _PGAC_CHECK_PYTHON_DIRS
	# -----------------------
	# Determine the name of various directories of a given Python installation,
	# as well as the Python version.
	AC_DEFUN([_PGAC_CHECK_PYTHON_DIRS],
	[AC_REQUIRE([PGAC_PATH_PYTHON])
	python_fullversion=`${PYTHON} -c "import sys; print(sys.version)" \| sed q`
	AC_MSG_NOTICE([using python $python_fullversion])
	# python_fullversion is typically n.n.n plus some trailing junk
	python_majorversion=`echo "$python_fullversion" \| sed '[s/^\([0-9]\)./\1/]'`
	python_minorversion=`echo "$python_fullversion" \| sed '[s/^[0-9]\.\([0-9]\).*/\1/]'`
	python_version=`echo "$python_fullversion" \| sed '[s/^\([0-9]\.[0-9]\).*/\1/]'`
	# Reject unsupported Python versions as soon as practical.
	if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 7; then
	AC_MSG_ERROR([Python version $python_version is too old (version 2.7 or later is required)])
	fi

	AC_MSG_CHECKING([for Python sysconfig module])
	if "${PYTHON}" -c 'import sysconfig' 2>&AS_MESSAGE_LOG_FD
	then
	AC_MSG_RESULT(yes)
	else
	AC_MSG_RESULT(no)
	AC_MSG_ERROR([sysconfig module not found])
	fi

	AC_MSG_CHECKING([Python configuration directory])
	python_configdir=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBPL'))))"`
	AC_MSG_RESULT([$python_configdir])

	AC_MSG_CHECKING([Python include directory])
	python_includespec=`${PYTHON} -c "import sysconfig; print('-I' + sysconfig.get_config_var('INCLUDEPY'))"`
	if test "$PORTNAME" = win32 ; then
	python_includespec=`echo $python_includespec \| sed 's,[[\]],/,g'`
	fi
	AC_MSG_RESULT([$python_includespec])

	AC_SUBST(python_majorversion)[]dnl
	AC_SUBST(python_version)[]dnl
	AC_SUBST(python_includespec)[]dnl
	])# _PGAC_CHECK_PYTHON_DIRS


	# PGAC_CHECK_PYTHON_EMBED_SETUP
	# -----------------------------
	#
	# Set python_libdir to the path of the directory containing the Python shared
	# library. Set python_libspec to the -L/-l linker switches needed to link it.
	# Set python_additional_libs to contain any additional linker switches needed
	# for subsidiary libraries.
	#
	# In modern, well-configured Python installations, LIBDIR gives the correct
	# directory name and LDLIBRARY is the file name of the shlib. But in older
	# installations LDLIBRARY is frequently a useless path fragment, and it's also
	# possible that the shlib is in a standard library directory such as /usr/lib
	# so that LIBDIR is irrelevant. Also, some packagers put the .so symlink for
	# the shlib in ${python_configdir} even though Python itself never does.
	# We must also check that what we found is a shared library not a plain
	# library, which we do by checking its extension. (We used to rely on
	# Py_ENABLE_SHARED, but that only tells us that a shlib exists, not that
	# we found it.)
	AC_DEFUN([PGAC_CHECK_PYTHON_EMBED_SETUP],
	[AC_REQUIRE([_PGAC_CHECK_PYTHON_DIRS])
	AC_MSG_CHECKING([how to link an embedded Python application])

	python_libdir=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBDIR'))))"`
	python_ldlibrary=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LDLIBRARY'))))"`

	# If LDLIBRARY exists and has a shlib extension, use it verbatim.
	ldlibrary=`echo "${python_ldlibrary}" \| sed -e 's/\.so$//' -e 's/\.dll$//' -e 's/\.dylib$//' -e 's/\.sl$//'`
	if test -e "${python_libdir}/${python_ldlibrary}" -a x"${python_ldlibrary}" != x"${ldlibrary}"
	then
	ldlibrary=`echo "${ldlibrary}" \| sed "s/^lib//"`
	found_shlib=1
	else
	# Otherwise, guess the base name of the shlib.
	# LDVERSION was added in Python 3.2, before that use VERSION,
	# or failing that, $python_version from _PGAC_CHECK_PYTHON_DIRS.
	python_ldversion=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LDVERSION'))))"`
	if test x"${python_ldversion}" != x""; then
	ldlibrary="python${python_ldversion}"
	else
	python_version_var=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('VERSION'))))"`
	if test x"${python_version_var}" != x""; then
	ldlibrary="python${python_version_var}"
	else
	ldlibrary="python${python_version}"
	fi
	fi
	# Search for a likely-looking file.
	found_shlib=0
	for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
	do
	# We don't know the platform DLSUFFIX here, so check 'em all.
	for e in .so .dll .dylib .sl; do
	if test -e "$d/lib${ldlibrary}$e"; then
	python_libdir="$d"
	found_shlib=1
	break 2
	fi
	done
	done
	# Some platforms (OpenBSD) require us to accept a bare versioned shlib
	# (".so.n.n") as well. However, check this only after failing to find
	# ".so" anywhere, because yet other platforms (Debian) put the .so
	# symlink in a different directory from the underlying versioned shlib.
	if test "$found_shlib" != 1; then
	for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
	do
	for f in "$d/lib${ldlibrary}.so."* ; do
	if test -e "$f"; then
	python_libdir="$d"
	found_shlib=1
	break 2
	fi
	done
	done
	fi
	# As usual, Windows has its own ideas. Possible default library
	# locations include c:/Windows/System32 and (for Cygwin) /usr/bin,
	# and the "lib" prefix might not be there.
	if test "$found_shlib" != 1 -a \( "$PORTNAME" = win32 -o "$PORTNAME" = cygwin \); then
	for d in "${python_libdir}" "${python_configdir}" c:/Windows/System32 /usr/bin
	do
	for f in "$d/lib${ldlibrary}.dll" "$d/${ldlibrary}.dll" ; do
	if test -e "$f"; then
	python_libdir="$d"
	found_shlib=1
	break 2
	fi
	done
	done
	fi
	fi
	if test "$found_shlib" != 1; then
	AC_MSG_ERROR([could not find shared library for Python
	You might have to rebuild your Python installation. Refer to the
	documentation for details. Use --without-python to disable building
	PL/Python.])
	fi
	python_libspec="-L${python_libdir} -l${ldlibrary}"

	python_additional_libs=`${PYTHON} -c "import sysconfig; print(' '.join(filter(None,sysconfig.get_config_vars('LIBS','LIBC','LIBM','BASEMODLIBS'))))"`

	AC_MSG_RESULT([${python_libspec} ${python_additional_libs}])

	AC_SUBST(python_libdir)[]dnl
	AC_SUBST(python_libspec)[]dnl
	AC_SUBST(python_additional_libs)[]dnl

	])# PGAC_CHECK_PYTHON_EMBED_SETUP