---
 configure.ac |   39 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 39 insertions(+)

--- a/configure.ac
+++ b/configure.ac
@@ -73,18 +73,28 @@
 
 AC_SUBST(PYTHON)
 
+if test -z "${PYTHON_VERSION}"; then
 PYTHON_VERSION=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write((sysconfig.get_config_var("VERSION")))'`
+fi
 
+if test -z "${PYTHON_INCLUDEPY}"; then
 CPPFLAGS1=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write("-I" + sysconfig.get_config_var("INCLUDEPY"))'`
+else
+CPPFLAGS1="${PYTHON_INCLUDEPY}"
+fi
 
+if test -z "${PYTHON_CFLAGS}"; then
 CPPFLAGS2=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write(" ".join(filter(lambda x: x.startswith("-D"), \
     sysconfig.get_config_var("CFLAGS").split())))'`
+else
+CPPFLAGS2="${PYTHON_CFLAGS}"
+fi
 
 if test "${ENABLE_EMBEDDED}" != "yes"; then
 CPPFLAGS3="-DMOD_WSGI_DISABLE_EMBEDDED"
@@ -96,22 +106,43 @@
 
 AC_SUBST(CPPFLAGS)
 
+if test -z "${PYTHON_LIBDIR}"; then
 PYTHONLIBDIR=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write(sysconfig.get_config_var("LIBDIR"))'`
+else
+PYTHONLIBDIR="${PYTHON_LIBDIR}"
+fi
+if test -z "${PYTHON_CFGDIR}"; then
 PYTHONCFGDIR=`${PYTHON} -c 'from sys import stdout; \
     import distutils.sysconfig; \
     stdout.write(distutils.sysconfig.get_python_lib(plat_specific=1, \
     standard_lib=1) +"/config")'`
+else
+PYTHONCFGDIR="${PYTHON_CFGDIR}"
+fi
+if test -z "${PYTHON_FRAMEWORKDIR}"; then
 PYTHONFRAMEWORKDIR=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORKDIR"))'`
+else
+PYTHONFRAMEWORKDIR="${PYTHON_FRAMEWORKDIR}"
+fi
+
+if test -z "${PYTHON_FRAMEWORKPREFIX}"; then
 PYTHONFRAMEWORKPREFIX=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORKPREFIX"))'`
+else
+PYTHONFRAMEWORKPREFIX="${PYTHON_FRAMEWORKPREFIX}"
+fi
+if test -z "${PYTHON_FRAMEWORK}"; then
 PYTHONFRAMEWORK=`${PYTHON} -c 'from sys import stdout; \
     from distutils import sysconfig; \
     stdout.write(sysconfig.get_config_var("PYTHONFRAMEWORK"))'`
+else
+PYTHONFRAMEWORK="${PYTHON_FRAMEWORK}"
+fi
 
 if test "${PYTHONFRAMEWORKDIR}" = "no-framework" -o \
         "${ENABLE_FRAMEWORK}" != "yes"; then
@@ -119,12 +150,20 @@
     LDFLAGS2="-L${PYTHONCFGDIR}"
 
     LDLIBS1="-lpython${PYTHON_VERSION}"
+    if test -z "${PYTHON_LIBS}"; then
     LDLIBS2=`${PYTHON} -c 'from sys import stdout; \
         from distutils import sysconfig; \
         stdout.write(sysconfig.get_config_var("LIBS"))'`
+    else
+    LDLIBS3="${PYTHON_LIBS}"
+    fi
+    if test -z "${PYTHON_SYSLIBS}"; then
     LDLIBS3=`${PYTHON} -c 'from sys import stdout; \
         from distutils import sysconfig; \
         stdout.write(sysconfig.get_config_var("SYSLIBS"))'`
+    else
+    LDLIBS3="${PYTHON_SYSLIBS}"
+    fi
 else
     LDFLAGS1="-Wl,-F${PYTHONFRAMEWORKPREFIX} -framework ${PYTHONFRAMEWORK}"