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https://git.postgresql.org/git/postgresql.git
synced 2024-11-21 03:13:05 +08:00
b21c569cea
Peter Eisentraut noted that commit 40b9f1921 had broken a configure
behavior that some people might rely on: AC_CHECK_PROGS(FOO,...) will
allow the search to be overridden by specifying a value for FOO on
configure's command line or in its environment, but AC_PATH_PROGS(FOO,...)
accepts such an override only if it's an absolute path. We had worked
around that behavior for some, but not all, of the pre-existing uses
of AC_PATH_PROGS by just skipping the macro altogether when FOO is
already set. Let's standardize on that workaround for all uses of
AC_PATH_PROGS, new and pre-existing, by wrapping AC_PATH_PROGS in a
new macro PGAC_PATH_PROGS. While at it, fix a deficiency of the old
workaround code by making sure we report the setting to configure's log.
Eventually I'd like to improve PGAC_PATH_PROGS so that it converts
non-absolute override inputs to absolute form, eg "PYTHON=python3"
becomes, say, PYTHON = /usr/bin/python3. But that will take some
nontrivial coding so it doesn't seem like a thing to do in late beta.
Discussion: https://postgr.es/m/90a92a7d-938e-507a-3bd7-ecd2b4004689@2ndquadrant.com
173 lines
6.4 KiB
Plaintext
173 lines
6.4 KiB
Plaintext
#
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# Autoconf macros for configuring the build of Python extension modules
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#
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# config/python.m4
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#
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# PGAC_PATH_PYTHON
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# ----------------
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# Look for Python and set the output variable 'PYTHON' if found,
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# fail otherwise.
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AC_DEFUN([PGAC_PATH_PYTHON],
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[PGAC_PATH_PROGS(PYTHON, python)
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if test x"$PYTHON" = x""; then
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AC_MSG_ERROR([Python not found])
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fi
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])
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# _PGAC_CHECK_PYTHON_DIRS
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# -----------------------
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# Determine the name of various directories of a given Python installation,
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# as well as the Python version.
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AC_DEFUN([_PGAC_CHECK_PYTHON_DIRS],
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[AC_REQUIRE([PGAC_PATH_PYTHON])
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AC_MSG_CHECKING([for Python distutils module])
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if "${PYTHON}" -c 'import distutils' 2>&AS_MESSAGE_LOG_FD
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then
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AC_MSG_RESULT(yes)
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else
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AC_MSG_RESULT(no)
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AC_MSG_ERROR([distutils module not found])
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fi
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AC_MSG_CHECKING([Python configuration directory])
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python_majorversion=`${PYTHON} -c "import sys; print(sys.version[[0]])"`
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python_minorversion=`${PYTHON} -c "import sys; print(sys.version[[2]])"`
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python_version=`${PYTHON} -c "import sys; print(sys.version[[:3]])"`
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python_configdir=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBPL'))))"`
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AC_MSG_RESULT([$python_configdir])
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# Reject unsupported Python versions as soon as practical.
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if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 4; then
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AC_MSG_ERROR([Python version $python_version is too old (version 2.4 or later is required)])
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fi
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AC_MSG_CHECKING([Python include directories])
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python_includespec=`${PYTHON} -c "
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import distutils.sysconfig
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a = '-I' + distutils.sysconfig.get_python_inc(False)
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b = '-I' + distutils.sysconfig.get_python_inc(True)
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if a == b:
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print(a)
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else:
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print(a + ' ' + b)"`
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if test "$PORTNAME" = win32 ; then
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python_includespec=`echo $python_includespec | sed 's,[[\]],/,g'`
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fi
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AC_MSG_RESULT([$python_includespec])
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AC_SUBST(python_majorversion)[]dnl
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AC_SUBST(python_version)[]dnl
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AC_SUBST(python_includespec)[]dnl
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])# _PGAC_CHECK_PYTHON_DIRS
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# PGAC_CHECK_PYTHON_EMBED_SETUP
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# -----------------------------
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#
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# Set python_libdir to the path of the directory containing the Python shared
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# library. Set python_libspec to the -L/-l linker switches needed to link it.
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# Set python_additional_libs to contain any additional linker switches needed
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# for subsidiary libraries.
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#
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# In modern, well-configured Python installations, LIBDIR gives the correct
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# directory name and LDLIBRARY is the file name of the shlib. But in older
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# installations LDLIBRARY is frequently a useless path fragment, and it's also
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# possible that the shlib is in a standard library directory such as /usr/lib
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# so that LIBDIR is irrelevant. Also, some packagers put the .so symlink for
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# the shlib in ${python_configdir} even though Python itself never does.
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# We must also check that what we found is a shared library not a plain
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# library, which we do by checking its extension. (We used to rely on
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# Py_ENABLE_SHARED, but that only tells us that a shlib exists, not that
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# we found it.)
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AC_DEFUN([PGAC_CHECK_PYTHON_EMBED_SETUP],
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[AC_REQUIRE([_PGAC_CHECK_PYTHON_DIRS])
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AC_MSG_CHECKING([how to link an embedded Python application])
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python_libdir=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBDIR'))))"`
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python_ldlibrary=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDLIBRARY'))))"`
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# If LDLIBRARY exists and has a shlib extension, use it verbatim.
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ldlibrary=`echo "${python_ldlibrary}" | sed -e 's/\.so$//' -e 's/\.dll$//' -e 's/\.dylib$//' -e 's/\.sl$//'`
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if test -e "${python_libdir}/${python_ldlibrary}" -a x"${python_ldlibrary}" != x"${ldlibrary}"
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then
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ldlibrary=`echo "${ldlibrary}" | sed "s/^lib//"`
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found_shlib=1
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else
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# Otherwise, guess the base name of the shlib.
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# LDVERSION was added in Python 3.2, before that use VERSION,
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# or failing that, $python_version from _PGAC_CHECK_PYTHON_DIRS.
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python_ldversion=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDVERSION'))))"`
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if test x"${python_ldversion}" != x""; then
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ldlibrary="python${python_ldversion}"
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else
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python_version_var=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('VERSION'))))"`
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if test x"${python_version_var}" != x""; then
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ldlibrary="python${python_version_var}"
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else
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ldlibrary="python${python_version}"
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fi
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fi
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# Search for a likely-looking file.
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found_shlib=0
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for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
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do
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# We don't know the platform DLSUFFIX here, so check 'em all.
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for e in .so .dll .dylib .sl; do
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if test -e "$d/lib${ldlibrary}$e"; then
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python_libdir="$d"
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found_shlib=1
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break 2
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fi
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done
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done
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# Some platforms (OpenBSD) require us to accept a bare versioned shlib
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# (".so.n.n") as well. However, check this only after failing to find
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# ".so" anywhere, because yet other platforms (Debian) put the .so
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# symlink in a different directory from the underlying versioned shlib.
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if test "$found_shlib" != 1; then
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for d in "${python_libdir}" "${python_configdir}" /usr/lib64 /usr/lib
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do
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for f in "$d/lib${ldlibrary}.so."* ; do
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if test -e "$f"; then
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python_libdir="$d"
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found_shlib=1
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break 2
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fi
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done
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done
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fi
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# As usual, Windows has its own ideas. Possible default library
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# locations include c:/Windows/System32 and (for Cygwin) /usr/bin,
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# and the "lib" prefix might not be there.
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if test "$found_shlib" != 1 -a \( "$PORTNAME" = win32 -o "$PORTNAME" = cygwin \); then
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for d in "${python_libdir}" "${python_configdir}" c:/Windows/System32 /usr/bin
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do
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for f in "$d/lib${ldlibrary}.dll" "$d/${ldlibrary}.dll" ; do
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if test -e "$f"; then
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python_libdir="$d"
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found_shlib=1
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break 2
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fi
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done
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done
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fi
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fi
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if test "$found_shlib" != 1; then
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AC_MSG_ERROR([could not find shared library for Python
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You might have to rebuild your Python installation. Refer to the
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documentation for details. Use --without-python to disable building
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PL/Python.])
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fi
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python_libspec="-L${python_libdir} -l${ldlibrary}"
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python_additional_libs=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','BASEMODLIBS'))))"`
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AC_MSG_RESULT([${python_libspec} ${python_additional_libs}])
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AC_SUBST(python_libdir)[]dnl
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AC_SUBST(python_libspec)[]dnl
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AC_SUBST(python_additional_libs)[]dnl
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])# PGAC_CHECK_PYTHON_EMBED_SETUP
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