AC_ARG_VAR([PYTHON_CONFIG], [Path to python-config])
AS_IF([test -z "$PYTHON_CONFIG"], [
AC_PATH_PROGS([PYTHON_CONFIG],
[python$PYTHON_VERSION-config python-config],
[no],
[`dirname $PYTHON`])
AS_IF([test "$PYTHON_CONFIG" = no], [AC_MSG_ERROR([cannot find python-config for $PYTHON.])])
])
AC_MSG_CHECKING([python include flags])
PYTHON_INCLUDE=`$PYTHON_CONFIG --includes`
AC_MSG_RESULT([$PYTHON_INCLUDE])
AC_MSG_CHECKING([python linker flags])
PYTHON_LDFLAGS=`$PYTHON_CONFIG --ldflags`
AC_MSG_RESULT([$PYTHON_LDFLAGS])
dnl Introduce --enable-native-optimizations command line argument to turn on
dnl -march=native compiler flag, disabled by default.
AC_ARG_ENABLE(
[native-optimizations],
[AS_HELP_STRING([--enable-native-optimizations], [Enable non-portable optimizations for your own CPU by compiling with -march=native @<:@default=no@:>@])]