diff options
Diffstat (limited to 'config/python.m4')
| -rw-r--r-- | config/python.m4 | 108 |
1 files changed, 90 insertions, 18 deletions
diff --git a/config/python.m4 b/config/python.m4 index b95c8ed3b3..953d709305 100644 --- a/config/python.m4 +++ b/config/python.m4 @@ -18,7 +18,8 @@ fi # _PGAC_CHECK_PYTHON_DIRS # ----------------------- -# Determine the name of various directories of a given Python installation. +# 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]) AC_MSG_CHECKING([for Python distutils module]) @@ -31,10 +32,16 @@ else fi AC_MSG_CHECKING([Python configuration directory]) python_majorversion=`${PYTHON} -c "import sys; print(sys.version[[0]])"` +python_minorversion=`${PYTHON} -c "import sys; print(sys.version[[2]])"` python_version=`${PYTHON} -c "import sys; print(sys.version[[:3]])"` python_configdir=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBPL'))))"` AC_MSG_RESULT([$python_configdir]) +# Reject unsupported Python versions as soon as practical. +if test "$python_majorversion" -lt 3 -a "$python_minorversion" -lt 4; then + AC_MSG_ERROR([Python version $python_version is too old (version 2.4 or later is required)]) +fi + AC_MSG_CHECKING([Python include directories]) python_includespec=`${PYTHON} -c " import distutils.sysconfig @@ -58,36 +65,101 @@ AC_SUBST(python_includespec)[]dnl # PGAC_CHECK_PYTHON_EMBED_SETUP # ----------------------------- # -# Note: selecting libpython from python_configdir works in all Python -# releases, but it generally finds a non-shared library, which means -# that we are binding the python interpreter right into libplpython.so. -# In Python 2.3 and up there should be a shared library available in -# the main library location. +# 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 distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBDIR'))))"` python_ldlibrary=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDLIBRARY'))))"` -python_so=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('SO'))))"` -ldlibrary=`echo "${python_ldlibrary}" | sed "s/${python_so}$//"` -python_enable_shared=`${PYTHON} -c "import distutils.sysconfig; print(distutils.sysconfig.get_config_vars().get('Py_ENABLE_SHARED',0))"` -if test x"${python_libdir}" != x"" -a x"${python_ldlibrary}" != x"" -a x"${python_ldlibrary}" != x"${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"${ldlibrary}" then - # New way: use the official shared library ldlibrary=`echo "${ldlibrary}" | sed "s/^lib//"` - python_libspec="-L${python_libdir} -l${ldlibrary}" + found_shlib=1 else - # Old way: use libpython from python_configdir - python_libdir="${python_configdir}" - # LDVERSION was introduced in Python 3.2. + # 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 distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LDVERSION'))))"` - if test x"${python_ldversion}" = x""; then - python_ldversion=$python_version + if test x"${python_ldversion}" != x""; then + ldlibrary="python${python_ldversion}" + else + python_version_var=`${PYTHON} -c "import distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('VERSION'))))"` + if test x"${python_version_var}" != x""; then + ldlibrary="python${python_version_var}" + else + ldlibrary="python${python_version}" + fi fi - python_libspec="-L${python_libdir} -lpython${python_ldversion}" + # 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 distutils.sysconfig; print(' '.join(filter(None,distutils.sysconfig.get_config_vars('LIBS','LIBC','LIBM','BASEMODLIBS'))))"` |