* configure.ac: Try to use python's distutils to fetch compilation

parameters.
	* configure: Regenerate.
	* python/python-config.py: New file.
This commit is contained in:
Doug Evans 2010-05-27 01:36:22 +00:00
parent 65f08db7b3
commit ec685c5eca
4 changed files with 458 additions and 98 deletions

View File

@ -1,3 +1,10 @@
2010-05-26 Doug Evans <dje@google.com>
* configure.ac: Try to use python's distutils to fetch compilation
parameters.
* configure: Regenerate.
* python/python-config.py: New file.
2010-05-26 Ozkan Sezer <sezeroz@gmail.com>
* ser-tcp.c (net_open): Check error return from socket() call by its

321
gdb/configure vendored
View File

@ -659,6 +659,7 @@ TARGET_SYSTEM_ROOT
CONFIG_LDFLAGS
ALLOCA
PYTHON_CFLAGS
python_prog_path
LTLIBEXPAT
LIBEXPAT
HAVE_LIBEXPAT
@ -10431,6 +10432,7 @@ fi
# Check whether --with-python was given.
if test "${with_python+set}" = set; then :
withval=$with_python;
@ -10448,36 +10450,234 @@ if test "${with_python}" = no; then
$as_echo "$as_me: WARNING: python support disabled; some features may be unavailable." >&2;}
have_libpython=no
else
have_python_config=no
case "${with_python}" in
yes | auto)
# Leave as empty, use defaults.
python_includes=
python_libs=
;;
/*)
python_includes="-I${with_python}/include"
python_libs="-L${with_python}/lib"
if test -d ${with_python}; then
# Assume the python binary is ${with_python}/bin/python.
python_prefix=${with_python}
python_prog="${with_python}/bin/python"
if test ! -x ${python_prog}; then
# Fall back to gdb 7.0/7.1 behaviour.
python_prog=missing
fi
elif test -x ${with_python}; then
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prefix=
python_prog=${with_python}
else
as_fn_error "invalid value for --with-python" "$LINENO" 5
fi
;;
*)
*/*)
# Disallow --with-python=foo/bar.
as_fn_error "invalid value for --with-python" "$LINENO" 5
;;
*)
# The user has either specified auto, yes, or the name of the python
# program assumed to be in $PATH.
python_prefix=
case "${with_python}" in
yes | auto)
if test ${build} = ${host}; then
# Extract the first word of "python", so it can be a program name with args.
set dummy python; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if test "${ac_cv_path_python_prog_path+set}" = set; then :
$as_echo_n "(cached) " >&6
else
case $python_prog_path in
[\\/]* | ?:[\\/]*)
ac_cv_path_python_prog_path="$python_prog_path" # Let the user override the test with a path.
;;
*)
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_path_python_prog_path="$as_dir/$ac_word$ac_exec_ext"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
IFS=$as_save_IFS
test -z "$ac_cv_path_python_prog_path" && ac_cv_path_python_prog_path="missing"
;;
esac
fi
python_prog_path=$ac_cv_path_python_prog_path
if test -n "$python_prog_path"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $python_prog_path" >&5
$as_echo "$python_prog_path" >&6; }
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
if test "${python_prog_path}" = missing; then
python_prog=missing
else
python_prog=${python_prog_path}
fi
else
# Not much we can do except assume the cross-compiler will find the
# right files.
python_prog=missing
fi
;;
*)
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prog="${with_python}"
# Extract the first word of "${python_prog}", so it can be a program name with args.
set dummy ${python_prog}; ac_word=$2
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
$as_echo_n "checking for $ac_word... " >&6; }
if test "${ac_cv_path_python_prog_path+set}" = set; then :
$as_echo_n "(cached) " >&6
else
case $python_prog_path in
[\\/]* | ?:[\\/]*)
ac_cv_path_python_prog_path="$python_prog_path" # Let the user override the test with a path.
;;
*)
as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
for as_dir in $PATH
do
IFS=$as_save_IFS
test -z "$as_dir" && as_dir=.
for ac_exec_ext in '' $ac_executable_extensions; do
if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
ac_cv_path_python_prog_path="$as_dir/$ac_word$ac_exec_ext"
$as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
break 2
fi
done
done
IFS=$as_save_IFS
test -z "$ac_cv_path_python_prog_path" && ac_cv_path_python_prog_path="missing"
;;
esac
fi
python_prog_path=$ac_cv_path_python_prog_path
if test -n "$python_prog_path"; then
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $python_prog_path" >&5
$as_echo "$python_prog_path" >&6; }
else
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
$as_echo "no" >&6; }
fi
if test "${python_prog_path}" = missing; then
as_fn_error "unable to find python program ${python_prog}" "$LINENO" 5
fi
;;
esac
esac
save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS ${python_includes}"
save_LIBS=$LIBS
LIBS="$LIBS ${python_libs}"
if test "${python_prog}" != missing; then
python_includes=`${python_prog} ${srcdir}/python/python-config.py --includes`
if test $? != 0; then
as_fn_error "failure running python-config --includes" "$LINENO" 5
fi
python_libs=`${python_prog} ${srcdir}/python/python-config.py --ldflags`
if test $? != 0; then
as_fn_error "failure running python-config --ldflags" "$LINENO" 5
fi
have_python_config=yes
else
# Fall back to gdb 7.0/7.1 behaviour.
if test -z ${python_prefix}; then
python_includes=
python_libs=
else
python_includes="-I${python_prefix}/include"
python_libs="-L${python_prefix}/lib"
fi
fi
# Having "/pythonX.Y" in the include path is awkward.
# All those python headers get bubbled up to the top inviting lots
# of random collisions. GDB originally didn't use python-config to
# find the compilation parameters and includes "pythonX.Y/" in the
# path of the, umm, include file. So strip away this part of the
# output of python-config --includes.
python_includes=`echo "${python_includes} " \
| sed -e 's,/python[0-9]*[.][0-9]* , ,g'`
# If we have python-config, only try the configuration it provides.
# Otherwise fallback on the old way of trying different versions of
# python in turn.
have_libpython=no
if test "${have_libpython}" = no; then
if test "${have_python_config}" = yes; then
python_version=`echo " ${python_libs} " \
| sed -e 's,^.* -l\(python[0-9]*[.][0-9]*\) .*$,\1,'`
if test "${python_version}" != ""; then
version=${python_version}
new_CPPFLAGS=${python_includes}
new_LIBS=${python_libs}
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${version}" >&5
$as_echo_n "checking for ${version}... " >&6; }
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
found_usable_python=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include "${version}/Python.h"
int
main ()
{
Py_Initialize ();
;
return 0;
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
have_libpython=${version}
found_usable_python=yes
else
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
$as_echo "${found_usable_python}" >&6; }
else
as_fn_error "unable to determine python version from ${python_libs}" "$LINENO" 5
fi
else
if test "${have_libpython}" = no; then
version=python2.6
HAVE_LIBPYTHON2_6=no
new_CPPFLAGS=${python_includes}
new_LIBS="${python_libs} -lpython2.6"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${version}" >&5
$as_echo_n "checking for ${version}... " >&6; }
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
LIBS="$LIBS -l${version}"
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
found_usable_python=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include "${version}/Python.h"
@ -10490,32 +10690,31 @@ Py_Initialize ();
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
HAVE_LIBPYTHON2_6=yes
have_libpython=yes
have_libpython=${version}
found_usable_python=yes
else
LIBS=$save_LIBS
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $HAVE_LIBPYTHON2_6" >&5
$as_echo "$HAVE_LIBPYTHON2_6" >&6; }
if test "${HAVE_LIBPYTHON2_6}" = yes; then
$as_echo "#define HAVE_LIBPYTHON2_6 1" >>confdefs.h
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
$as_echo "${found_usable_python}" >&6; }
fi
fi
if test ${have_libpython} = no; then
if test ${have_libpython} = no; then
version=python2.5
HAVE_LIBPYTHON2_5=no
new_CPPFLAGS=${python_includes}
new_LIBS="${python_libs} -lpython2.5"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${version}" >&5
$as_echo_n "checking for ${version}... " >&6; }
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
LIBS="$LIBS -l${version}"
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
found_usable_python=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include "${version}/Python.h"
@ -10528,32 +10727,31 @@ Py_Initialize ();
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
HAVE_LIBPYTHON2_5=yes
have_libpython=yes
have_libpython=${version}
found_usable_python=yes
else
LIBS=$save_LIBS
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $HAVE_LIBPYTHON2_5" >&5
$as_echo "$HAVE_LIBPYTHON2_5" >&6; }
if test "${HAVE_LIBPYTHON2_5}" = yes; then
$as_echo "#define HAVE_LIBPYTHON2_5 1" >>confdefs.h
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
$as_echo "${found_usable_python}" >&6; }
fi
fi
if test ${have_libpython} = no; then
if test ${have_libpython} = no; then
version=python2.4
HAVE_LIBPYTHON2_4=no
new_CPPFLAGS=${python_includes}
new_LIBS="${python_libs} -lpython2.4"
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for ${version}" >&5
$as_echo_n "checking for ${version}... " >&6; }
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
LIBS="$LIBS -l${version}"
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
found_usable_python=no
cat confdefs.h - <<_ACEOF >conftest.$ac_ext
/* end confdefs.h. */
#include "${version}/Python.h"
@ -10566,23 +10764,34 @@ Py_Initialize ();
}
_ACEOF
if ac_fn_c_try_link "$LINENO"; then :
HAVE_LIBPYTHON2_4=yes
have_libpython=yes
have_libpython=${version}
found_usable_python=yes
else
LIBS=$save_LIBS
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
rm -f core conftest.err conftest.$ac_objext \
conftest$ac_exeext conftest.$ac_ext
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $HAVE_LIBPYTHON2_4" >&5
$as_echo "$HAVE_LIBPYTHON2_4" >&6; }
if test "${HAVE_LIBPYTHON2_4}" = yes; then
$as_echo "#define HAVE_LIBPYTHON2_4 1" >>confdefs.h
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${found_usable_python}" >&5
$as_echo "${found_usable_python}" >&6; }
fi
fi
if test ${have_libpython} = no; then
if test "${have_libpython}" = python2.6; then
$as_echo "#define HAVE_LIBPYTHON2_6 1" >>confdefs.h
elif test "${have_libpython}" = python2.5; then
$as_echo "#define HAVE_LIBPYTHON2_5 1" >>confdefs.h
elif test "${have_libpython}" = python2.4; then
$as_echo "#define HAVE_LIBPYTHON2_4 1" >>confdefs.h
fi
if test "${have_libpython}" = no; then
case "${with_python}" in
yes)
as_fn_error "python is missing or unusable" "$LINENO" 5
@ -10595,12 +10804,10 @@ $as_echo "$as_me: WARNING: python is missing or unusable; some features may be u
as_fn_error "no usable python found at ${with_python}" "$LINENO" 5
;;
esac
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
fi
if test "${have_libpython}" = yes; then
if test "${have_libpython}" != no; then
$as_echo "#define HAVE_PYTHON 1" >>confdefs.h

View File

@ -589,22 +589,31 @@ else
fi
dnl Utility to simplify finding libpython.
dnl $1 = pythonX.Y
dnl $2 = the shell variable to assign the result to
dnl If libpython is found we store $version here.
dnl $3 = additional flags to add to CPPFLAGS
dnl $4 = additional flags to add to LIBS
AC_DEFUN([AC_TRY_LIBPYTHON],
[
version=$1
define([have_libpython_var],$2)
define([VERSION],[translit([$1],[abcdefghijklmnopqrstuvwxyz./-],
[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])])
[HAVE_LIB]VERSION=no
new_CPPFLAGS=$3
new_LIBS=$4
AC_MSG_CHECKING([for ${version}])
save_CPPFLAGS=$CPPFLAGS
save_LIBS=$LIBS
LIBS="$LIBS -l${version}"
CPPFLAGS="$CPPFLAGS $new_CPPFLAGS"
LIBS="$LIBS $new_LIBS"
found_usable_python=no
AC_LINK_IFELSE(AC_LANG_PROGRAM([[#include "${version}/Python.h"]],
[[Py_Initialize ();]]),
[[HAVE_LIB]VERSION=yes
have_libpython_var=yes],
[LIBS=$save_LIBS])
AC_MSG_RESULT([$[HAVE_LIB]VERSION])
[have_libpython_var=${version}
found_usable_python=yes],
[CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS])
AC_MSG_RESULT([${found_usable_python}])
])
AC_ARG_WITH(python,
@ -617,45 +626,130 @@ if test "${with_python}" = no; then
AC_MSG_WARN([python support disabled; some features may be unavailable.])
have_libpython=no
else
have_python_config=no
case "${with_python}" in
yes | auto)
# Leave as empty, use defaults.
python_includes=
python_libs=
;;
/*)
python_includes="-I${with_python}/include"
python_libs="-L${with_python}/lib"
if test -d ${with_python}; then
# Assume the python binary is ${with_python}/bin/python.
python_prefix=${with_python}
python_prog="${with_python}/bin/python"
if test ! -x ${python_prog}; then
# Fall back to gdb 7.0/7.1 behaviour.
python_prog=missing
fi
elif test -x ${with_python}; then
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prefix=
python_prog=${with_python}
else
AC_ERROR(invalid value for --with-python)
fi
;;
*)
*/*)
# Disallow --with-python=foo/bar.
AC_ERROR(invalid value for --with-python)
;;
*)
# The user has either specified auto, yes, or the name of the python
# program assumed to be in $PATH.
python_prefix=
case "${with_python}" in
yes | auto)
if test ${build} = ${host}; then
AC_PATH_PROG(python_prog_path, python, missing)
if test "${python_prog_path}" = missing; then
python_prog=missing
else
python_prog=${python_prog_path}
fi
else
# Not much we can do except assume the cross-compiler will find the
# right files.
python_prog=missing
fi
;;
*)
# While we can't run python compiled for $host (unless host == build),
# the user could write a script that provides the needed information,
# so we support that.
python_prog="${with_python}"
AC_PATH_PROG(python_prog_path, ${python_prog}, missing)
if test "${python_prog_path}" = missing; then
AC_ERROR(unable to find python program ${python_prog})
fi
;;
esac
esac
save_CPPFLAGS=$CPPFLAGS
CPPFLAGS="$CPPFLAGS ${python_includes}"
save_LIBS=$LIBS
LIBS="$LIBS ${python_libs}"
if test "${python_prog}" != missing; then
python_includes=`${python_prog} ${srcdir}/python/python-config.py --includes`
if test $? != 0; then
AC_ERROR(failure running python-config --includes)
fi
python_libs=`${python_prog} ${srcdir}/python/python-config.py --ldflags`
if test $? != 0; then
AC_ERROR(failure running python-config --ldflags)
fi
have_python_config=yes
else
# Fall back to gdb 7.0/7.1 behaviour.
if test -z ${python_prefix}; then
python_includes=
python_libs=
else
python_includes="-I${python_prefix}/include"
python_libs="-L${python_prefix}/lib"
fi
fi
# Having "/pythonX.Y" in the include path is awkward.
# All those python headers get bubbled up to the top inviting lots
# of random collisions. GDB originally didn't use python-config to
# find the compilation parameters and includes "pythonX.Y/" in the
# path of the, umm, include file. So strip away this part of the
# output of python-config --includes.
python_includes=`echo "${python_includes} " \
| sed -e 's,/python[[0-9]]*[[.]][[0-9]]* , ,g'`
# If we have python-config, only try the configuration it provides.
# Otherwise fallback on the old way of trying different versions of
# python in turn.
have_libpython=no
if test "${have_python_config}" = yes; then
python_version=`echo " ${python_libs} " \
| sed -e 's,^.* -l\(python[[0-9]]*[[.]][[0-9]]*\) .*$,\1,'`
if test "${python_version}" != ""; then
AC_TRY_LIBPYTHON(${python_version}, have_libpython,
${python_includes}, ${python_libs})
else
AC_MSG_ERROR([unable to determine python version from ${python_libs}])
fi
else
if test "${have_libpython}" = no; then
AC_TRY_LIBPYTHON(python2.6, have_libpython,
${python_includes}, "${python_libs} -lpython2.6")
fi
if test ${have_libpython} = no; then
AC_TRY_LIBPYTHON(python2.5, have_libpython,
${python_includes}, "${python_libs} -lpython2.5")
fi
if test ${have_libpython} = no; then
AC_TRY_LIBPYTHON(python2.4, have_libpython,
${python_includes}, "${python_libs} -lpython2.4")
fi
fi
if test "${have_libpython}" = python2.6; then
AC_DEFINE(HAVE_LIBPYTHON2_6, 1, [Define if Python 2.6 is being used.])
elif test "${have_libpython}" = python2.5; then
AC_DEFINE(HAVE_LIBPYTHON2_5, 1, [Define if Python 2.5 is being used.])
elif test "${have_libpython}" = python2.4; then
AC_DEFINE(HAVE_LIBPYTHON2_4, 1, [Define if Python 2.4 is being used.])
fi
if test "${have_libpython}" = no; then
AC_TRY_LIBPYTHON(python2.6, have_libpython)
if test "${HAVE_LIBPYTHON2_6}" = yes; then
AC_DEFINE(HAVE_LIBPYTHON2_6, 1, [Define if Python 2.6 is being used.])
fi
fi
if test ${have_libpython} = no; then
AC_TRY_LIBPYTHON(python2.5, have_libpython)
if test "${HAVE_LIBPYTHON2_5}" = yes; then
AC_DEFINE(HAVE_LIBPYTHON2_5, 1, [Define if Python 2.5 is being used.])
fi
fi
if test ${have_libpython} = no; then
AC_TRY_LIBPYTHON(python2.4, have_libpython)
if test "${HAVE_LIBPYTHON2_4}" = yes; then
AC_DEFINE(HAVE_LIBPYTHON2_4, 1, [Define if Python 2.4 is being used.])
fi
fi
if test ${have_libpython} = no; then
case "${with_python}" in
yes)
AC_MSG_ERROR([python is missing or unusable])
@ -667,12 +761,10 @@ else
AC_MSG_ERROR([no usable python found at ${with_python}])
;;
esac
CPPFLAGS=$save_CPPFLAGS
LIBS=$save_LIBS
fi
fi
if test "${have_libpython}" = yes; then
if test "${have_libpython}" != no; then
AC_DEFINE(HAVE_PYTHON, 1, [Define if Python interpreter is being linked in.])
CONFIG_OBS="$CONFIG_OBS \$(SUBDIR_PYTHON_OBS)"
CONFIG_DEPS="$CONFIG_DEPS \$(SUBDIR_PYTHON_DEPS)"

View File

@ -0,0 +1,54 @@
# Program to fetch python compilation parameters.
# Copied from python-config of the 2.6.5 release.
import sys
import os
import getopt
from distutils import sysconfig
valid_opts = ['prefix', 'exec-prefix', 'includes', 'libs', 'cflags',
'ldflags', 'help']
def exit_with_usage(code=1):
print >>sys.stderr, "Usage: %s [%s]" % (sys.argv[0],
'|'.join('--'+opt for opt in valid_opts))
sys.exit(code)
try:
opts, args = getopt.getopt(sys.argv[1:], '', valid_opts)
except getopt.error:
exit_with_usage()
if not opts:
exit_with_usage()
opt = opts[0][0]
pyver = sysconfig.get_config_var('VERSION')
getvar = sysconfig.get_config_var
if opt == '--help':
exit_with_usage(0)
elif opt == '--prefix':
print sysconfig.PREFIX
elif opt == '--exec-prefix':
print sysconfig.EXEC_PREFIX
elif opt in ('--includes', '--cflags'):
flags = ['-I' + sysconfig.get_python_inc(),
'-I' + sysconfig.get_python_inc(plat_specific=True)]
if opt == '--cflags':
flags.extend(getvar('CFLAGS').split())
print ' '.join(flags)
elif opt in ('--libs', '--ldflags'):
libs = getvar('LIBS').split() + getvar('SYSLIBS').split()
libs.append('-lpython'+pyver)
# add the prefix/lib/pythonX.Y/config dir, but only if there is no
# shared library in prefix/lib/.
if opt == '--ldflags' and not getvar('Py_ENABLE_SHARED'):
libs.insert(0, '-L' + getvar('LIBPL'))
print ' '.join(libs)