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Diffstat (limited to 'common/m4/as-python.m4')
| -rwxr-xr-x | common/m4/as-python.m4 | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/common/m4/as-python.m4 b/common/m4/as-python.m4 new file mode 100755 index 0000000..eb9b175 --- /dev/null +++ b/common/m4/as-python.m4 @@ -0,0 +1,152 @@ +## ------------------------ +## Python file handling +## From Andrew Dalke +## Updated by James Henstridge +## Updated by Andy Wingo to loop through possible pythons +## ------------------------ + +# 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 +# <wingo@pobox.com> +# Updated to only warn and unset PYTHON if no good one is found + +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? + PYTHON_CANDIDATES="python python2.2 python2.1 python2.0 python2 \ + python1.6 python1.5" + ifelse([$1],[], + [AC_PATH_PROG(PYTHON, $PYTHON_CANDIDATES)], + [ + AC_MSG_NOTICE(Looking for Python version >= $1) + changequote(<<, >>)dnl + prog=" +import sys, string +minver = '$1' +# split string by '.' and convert to numeric +minver_info = map(string.atoi, string.split(minver, '.')) +# we can now do comparisons on the two lists: +if sys.version_info >= tuple(minver_info): + sys.exit(0) +else: + sys.exit(1)" + changequote([, ])dnl + + python_good=false + for python_candidate in $PYTHON_CANDIDATES; 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_WARN([No suitable version of python found]) + PYTHON= + else + + 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]) + + fi +]) |