[Discuss-gnuradio] Re: mingw patch with working createfilemapping and resolved backslash problems

[Martin Dvh]

Martin Dvh wrote:
> Hi all,
> I added some additional code to gr_python.m4 to get rid of all remaining 
> backslash problems in python pathnames.
> I put it in a section which is only executed on mingw (case host_os in 
> mingw*)
> (No more python related patchnames required as ./configure parameters.)
I found that my changes of gr_python.m4 collided with recent changes in cvs.
I tried to make a new working version containing the new way of finding the 
python include path (as in current cvs) but couldn't get that to work.
Configure crashes on this code on mingw (I get an unexpected end of file):
        AC_CACHE_CHECK([for Python include path],
                cv_python_path,
                [
        if test -z "$PYTHON" ; then
                AC_MSG_ERROR([cannot find Python path])
        fi
I think this has again todo with the backslashes (and possibly m4 underquoting) 
in the cv_python_path that AM_PATH_PYTHON provides.

I attached my version of gr_python.m4
This uses the "old" way of determing Python include path and it works on mingw and should also work on other systems (it checks for host_os = mingw for the 
mingw specific code).
This might however make cross-compiling more difficult so I still hope my new 
code and the new code in cvs can be made to work together.


Greetings,
Martin

dnl
dnl Copyright 2003 Free Software Foundation, Inc.
dnl 
dnl This file is part of GNU Radio
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dnl GNU Radio is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
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dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
dnl GNU General Public License for more details.
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dnl You should have received a copy of the GNU General Public License
dnl along with GNU Radio; see the file COPYING.  If not, write to
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dnl 

# PYTHON_DEVEL()
#
# Checks for Python and tries to get the include path to 'Python.h'.
# It provides the $(PYTHON_CPPFLAGS) output variable.
AC_DEFUN([PYTHON_DEVEL],[
        AC_REQUIRE([AM_PATH_PYTHON])
        AC_REQUIRE([AC_CANONICAL_HOST])

        # Check for Python include path
        AC_MSG_CHECKING([for Python include path])
        if test -z "$PYTHON" ; then
                AC_MSG_ERROR([cannot find Python path])
        fi

        # ask distutils which include path we should use
        python_cmd='
import distutils.sysconfig
import os
path = distutils.sysconfig.get_python_inc(plat_specific=False)
if os.sep == "\\":
  path = path.replace("\\", "/")
print path
'
        python_path=`$PYTHON -c "$python_cmd"`
        AC_MSG_RESULT([$python_path])
        if test -z "$python_path" ; then
                AC_MSG_ERROR([cannot find Python include path])
        fi

        AC_SUBST(PYTHON_CPPFLAGS,[-I$python_path])

        # Check for Python headers usability
        python_save_CPPFLAGS=$CPPFLAGS
        CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
        AC_CHECK_HEADERS([Python.h], [],
                        [AC_MSG_ERROR([cannot find usable Python headers])])
        CPPFLAGS="$python_save_CPPFLAGS"

        # The block below is commented out because it breaks the x86-64 and 
OS/X build.

        # Only set this on mingw target, (only implemented for mingw host, for 
crosscompiling you need to trick this)
        PYTHON_LDFLAGS=""
        case $host_os in
             *mingw* )
          AC_MSG_CHECKING([for Python LDFLAGS])
          python_cmd='
import distutils.sysconfig
import os
path = distutils.sysconfig.PREFIX + "/libs"
if os.sep == "\\":
  path = path.replace("\\", "/")
print path
'
          python_stdlib_path=`$PYTHON -c "$python_cmd"`
          python_version_nodot=`echo $PYTHON_VERSION | sed "s,\.,,"`
          libpython_name="python$PYTHON_VERSION"
          # Standard install of python for win32 has libpython24.a in stead of 
libpython2.4.a so we check for the library without the dot in the 
versionnumber. 
          python_stdlib_filename=`find $python_stdlib_path -type f -name 
libpython$python_version_nodot.* -print | sed "1q"`
          if test -n "$python_stdlib_filename" ; then
                libpython_name="python$python_version_nodot"
          fi
          PYTHON_LDFLAGS="-L$python_stdlib_path -l$libpython_name"
          AC_MSG_RESULT($PYTHON_LDFLAGS) 
          # Replace all backslashes in PYTHON Paths with forward slashes
          AC_MSG_CHECKING([for pythondir])
          pythondir=`echo $pythondir |sed 's,\\\\,/,g'`
          AC_MSG_RESULT($pythondir)
          AC_SUBST([pythondir])
          AC_MSG_CHECKING([for pkgpythondir])
          pkgpythondir=`echo $pkgpythondir |sed 's,\\\\,/,g'`
          AC_MSG_RESULT($pkgpythondir)
          AC_SUBST([pkgpythondir])
          AC_MSG_CHECKING([for pyexecdir])
          pyexecdir=`echo $pyexecdir |sed 's,\\\\,/,g'`
          AC_MSG_RESULT($pyexecdir)
          AC_SUBST([pyexecdir])
          AC_MSG_CHECKING([for pkgpyexecdir])
          pkgpyexecdir=`echo $pkgpyexecdir |sed 's,\\\\,/,g'`
          AC_MSG_RESULT($pkgpyexecdir)
          AC_SUBST([pkgpyexecdir])
        esac 
        AC_SUBST([PYTHON_LDFLAGS])

dnl     # Check for Python library path
dnl     AC_MSG_CHECKING([for Python library path])
dnl     python_path=`echo $PYTHON | sed "s,/bin.*$,,"`
dnl     for i in "$python_path/lib/python$PYTHON_VERSION/config/" 
"$python_path/lib/python$PYTHON_VERSION/" "$python_path/lib/python/config/" 
"$python_path/lib/python/" "$python_path/" "$python_path/libs" ; do
dnl             python_path=`find $i -type f -name libpython$PYTHON_VERSION.* 
-print | sed "1q"`
dnl             if test -n "$python_path" ; then
dnl                     break
dnl             fi
dnl     done
dnl     python_path=`echo $python_path | sed "s,/libpython.*$,,"`
dnl     if test -z "$python_path" ; then
dnl             AC_MSG_WARN(cannot find Python library path)
dnl     fi
dnl     AC_MSG_RESULT([$python_path])
dnl
dnl     AC_SUBST([PYTHON_LDFLAGS],["-L$python_path -lpython$PYTHON_VERSION"])
dnl     #
dnl     python_site=`echo $python_path | sed "s/config/site-packages/"`
dnl     AC_SUBST([PYTHON_SITE_PKG],[$python_site])
dnl     #
dnl     # libraries which must be linked in when embedding
dnl     #
dnl     AC_MSG_CHECKING(python extra libraries)
dnl     PYTHON_EXTRA_LIBS=`$PYTHON -c "import distutils.sysconfig; \
dnl                conf = distutils.sysconfig.get_config_var; \
dnl                print conf('LOCALMODLIBS')+' '+conf('LIBS')"
dnl     AC_MSG_RESULT($PYTHON_EXTRA_LIBS)`
dnl     AC_SUBST(PYTHON_EXTRA_LIBS)
dnl
dnl
dnl     # Check for Python library usability
dnl     python_save_LIBS=$LIBS
dnl     python_save_CPPFLAGS=$CPPFLAGS
dnl     LIBS="$LIBS $PYTHON_LDFLAGS $PYTHON_EXTRA_LIBS"
dnl     CPPFLAGS="$CPPFLAGS $PYTHON_CPPFLAGS"
dnl
dnl     AC_MSG_CHECKING(Python headers and library usability)
dnl     AC_TRY_LINK([ #include <Python.h> ], [ PyArg_Parse(NULL, NULL); ],
dnl             [AC_MSG_RESULT(yes)],
dnl             [AC_MSG_WARN(no dev lib, crossing fingers)
dnl              AC_SUBST([PYTHON_LDFLAGS],[""])])
dnl
dnl     CPPFLAGS="$python_save_CPPFLAGS"
dnl     LIBS="$python_save_LIBS"

])