dnl as-python.m4 0.1.0 dnl autostars m4 macro for python checks dnl From Andrew Dalke dnl Updated by James Henstridge dnl Updated by Andy Wingo to loop through possible pythons dnl Updated by Thomas Vander Stichele to check for presence of packages/modules dnl $Id: as-python.m4,v 1.1.1.1 2007-04-27 02:45:16 iovar Exp $ # AS_PATH_PYTHON([MINIMUM-VERSION]) # Adds support for distributing Python modules and packages. To # install modules, copy them to $(pythondir), using the python_PYTHON # automake variable. To install a package with the same name as the # automake package, install to $(pkgpythondir), or use the # pkgpython_PYTHON automake variable. # The variables $(pyexecdir) and $(pkgpyexecdir) are provided as # locations to install python extension modules (shared libraries). # Another macro is required to find the appropriate flags to compile # extension modules. # If your package is configured with a different prefix to python, # users will have to add the install directory to the PYTHONPATH # environment variable, or create a .pth file (see the python # documentation for details). # If the MINIMUM-VERSION argument is passed, AS_PATH_PYTHON will # cause an error if the version of python installed on the system # doesn't meet the requirement. MINIMUM-VERSION should consist of # numbers and dots only. # Updated to loop over all possible python binaries by Andy Wingo # AC_DEFUN([AS_PATH_PYTHON], [ dnl Find a version of Python. I could check for python versions 1.4 dnl or earlier, but the default installation locations changed from dnl $prefix/lib/site-python in 1.4 to $prefix/lib/python1.5/site-packages dnl in 1.5, and I don't want to maintain that logic. dnl should we do the version check? ifelse([$1],[], [AC_PATH_PROG(PYTHON, python python2.1 python2.0 python1.6 python1.5)], [ AC_MSG_NOTICE(Looking for Python version >= $1) changequote(<<, >>)dnl prog=" import sys, string minver = '$1' pyver = string.split(sys.version)[0] # first word is version string # split strings by '.'. just compare textually to allow for versions like # 2.4.1a0 minver = string.split(minver, '.') pyver = string.split(pyver, '.') # we can now do comparisons on the two lists: if pyver >= minver: sys.exit(0) else: sys.exit(1)" changequote([, ])dnl python_good=false for python_candidate in python python2.2 python2.1 python2.0 python2 python1.6 python1.5; do unset PYTHON AC_PATH_PROG(PYTHON, $python_candidate) 1> /dev/null 2> /dev/null if test "x$PYTHON" = "x"; then continue; fi if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC; then AC_MSG_CHECKING(["$PYTHON":]) AC_MSG_RESULT([okay]) python_good=true break; else dnl clear the cache val unset ac_cv_path_PYTHON fi done ]) if test "$python_good" != "true"; then AC_MSG_ERROR([No suitable version of python found]) fi AC_MSG_CHECKING([local Python configuration]) dnl Query Python for its version number. Getting [:3] seems to be dnl the best way to do this; it's what "site.py" does in the standard dnl library. Need to change quote character because of [:3] AC_SUBST(PYTHON_VERSION) changequote(<<, >>)dnl PYTHON_VERSION=`$PYTHON -c "import sys; print sys.version[:3]"` changequote([, ])dnl dnl Use the values of $prefix and $exec_prefix for the corresponding dnl values of PYTHON_PREFIX and PYTHON_EXEC_PREFIX. These are made dnl distinct variables so they can be overridden if need be. However, dnl general consensus is that you shouldn't need this ability. AC_SUBST(PYTHON_PREFIX) PYTHON_PREFIX='${prefix}' AC_SUBST(PYTHON_EXEC_PREFIX) PYTHON_EXEC_PREFIX='${exec_prefix}' dnl At times (like when building shared libraries) you may want dnl to know which OS platform Python thinks this is. AC_SUBST(PYTHON_PLATFORM) PYTHON_PLATFORM=`$PYTHON -c "import sys; print sys.platform"` dnl Set up 4 directories: dnl pythondir -- where to install python scripts. This is the dnl site-packages directory, not the python standard library dnl directory like in previous automake betas. This behaviour dnl is more consistent with lispdir.m4 for example. dnl dnl Also, if the package prefix isn't the same as python's prefix, dnl then the old $(pythondir) was pretty useless. AC_SUBST(pythondir) pythondir=$PYTHON_PREFIX"/lib/python"$PYTHON_VERSION/site-packages dnl pkgpythondir -- $PACKAGE directory under pythondir. Was dnl PYTHON_SITE_PACKAGE in previous betas, but this naming is dnl more consistent with the rest of automake. dnl Maybe this should be put in python.am? AC_SUBST(pkgpythondir) pkgpythondir=\${pythondir}/$PACKAGE dnl pyexecdir -- directory for installing python extension modules dnl (shared libraries) Was PYTHON_SITE_EXEC in previous betas. AC_SUBST(pyexecdir) pyexecdir=$PYTHON_EXEC_PREFIX"/lib/python"$PYTHON_VERSION/site-packages dnl pkgpyexecdir -- $(pyexecdir)/$(PACKAGE) dnl Maybe this should be put in python.am? AC_SUBST(pkgpyexecdir) pkgpyexecdir=\${pyexecdir}/$PACKAGE AC_MSG_RESULT([looks good]) ]) dnl AS_PYTHON_IMPORT(PACKAGE/MODULE, [ACTION-IF-FOUND, [ACTION-IF-NOT-FOUND, [PREAMBLE, [POSTAMBLE]]]]) dnl Try to import the given PACKAGE/MODULE AC_DEFUN([AS_PYTHON_IMPORT], [ dnl Check if we can import a given module. dnl Requires AS_PATH_PYTHON to be called before. AC_MSG_CHECKING([for python module $1]) prog=" import sys try: $4 import $1 $5 sys.exit(0) except ImportError: sys.exit(1) except SystemExit: raise except Exception, e: print ' Error while trying to import $1:' print ' %r: %s' % (e, e) sys.exit(1)" if $PYTHON -c "$prog" 1>&AC_FD_CC 2>&AC_FD_CC then AC_MSG_RESULT(found) ifelse([$2], , :, [$2]) else AC_MSG_RESULT(not found) ifelse([$3], , :, [$3]) fi ]) dnl a macro to check for ability to create python extensions dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE]) dnl function also defines PYTHON_INCLUDES AC_DEFUN([AM_CHECK_PYTHON_HEADERS], [ AC_REQUIRE([AM_PATH_PYTHON]) AC_MSG_CHECKING(for headers required to compile python extensions) dnl deduce PYTHON_INCLUDES py_prefix=`$PYTHON -c "import sys; print sys.prefix"` py_exec_prefix=`$PYTHON -c "import sys; print sys.exec_prefix"` PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}" if test "$py_prefix" != "$py_exec_prefix"; then PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}" fi AC_SUBST(PYTHON_INCLUDES) dnl check if the headers exist: save_CPPFLAGS="$CPPFLAGS" CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES" AC_TRY_CPP([#include ],dnl [AC_MSG_RESULT(found) $1],dnl [AC_MSG_RESULT(not found) $2]) CPPFLAGS="$save_CPPFLAGS" ])