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m4/am-check-python-headers.m4: Try python-config --includes

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Some systems (e.g. Arch Linux) put the Python C headers in a strange
place, so try and run `$PYTHON-config --includes` first to find the -I
options to pass to the C compiler.  Fall back to the old method if it
fails.

Thanks to Darrell Enns for reporting the problem and suggesting a
solution.  I changed it a bit.
This commit is contained in:
Ian Abbott 2013-08-21 11:06:24 +01:00
parent 155529234a
commit 5f3b60573e
1 changed files with 17 additions and 9 deletions
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26
m4/am-check-python-headers.m4
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@ -3,22 +3,30 @@ dnl AM_CHECK_PYTHON_HEADERS([ACTION-IF-POSSIBLE], [ACTION-IF-NOT-POSSIBLE])
dnl function also defines PYTHON_INCLUDES
AC_DEFUN([AM_CHECK_PYTHON_HEADERS],
[AC_REQUIRE([AM_PATH_PYTHON])
AC_MSG_CHECKING(for headers required to compile python extensions)
dnl deduce PYTHON_INCLUDES
py_prefix=`$PYTHON -c "import sys; print(sys.prefix)"`
py_exec_prefix=`$PYTHON -c "import sys; print(sys.exec_prefix)"`
PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
if test "$py_prefix" != "$py_exec_prefix"; then
PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
AC_MSG_CHECKING([for python headers using $PYTHON-config --includes])
PYTHON_INCLUDES=`$PYTHON-config --includes`
if test $? = 0; then
AC_MSG_RESULT([$PYTHON_INCLUDES])
else
AC_MSG_RESULT([failed, will try another way])
py_prefix=`$PYTHON -c "import sys; print(sys.prefix)"`
py_exec_prefix=`$PYTHON -c "import sys; print(sys.exec_prefix)"`
PYTHON_INCLUDES="-I${py_prefix}/include/python${PYTHON_VERSION}"
if test "$py_prefix" != "$py_exec_prefix"; then
PYTHON_INCLUDES="$PYTHON_INCLUDES -I${py_exec_prefix}/include/python${PYTHON_VERSION}"
fi
AC_MSG_NOTICE([setting python headers to $PYTHON_INCLUDES])
fi
AC_SUBST(PYTHON_INCLUDES)
dnl check if the headers exist:
AC_MSG_CHECKING([whether python headers are sufficient])
AC_SUBST(PYTHON_INCLUDES)
save_CPPFLAGS="$CPPFLAGS"
CPPFLAGS="$CPPFLAGS $PYTHON_INCLUDES"
AC_TRY_CPP([#include <Python.h>],dnl
[AC_MSG_RESULT(found)
[AC_MSG_RESULT(yes)
$1],dnl
[AC_MSG_RESULT(not found)
[AC_MSG_RESULT(no)
$2])
CPPFLAGS="$save_CPPFLAGS"
])