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build: improve python search pattern

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- try pythonN.N-config after pythonN-config
- use "python-config --ldflags" instead of --libs
- add Python 3.6 to explicitly searched versions
- if linking fails, try with "-lz" added

Signed-off-by: David Lamparter <equinox@diac24.net>
This commit is contained in:
David Lamparter 2018-08-22 06:04:32 +02:00
parent 892d21b171
commit 0fca9cee36
1 changed files with 62 additions and 42 deletions
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92
configure.ac
View file

@ -531,6 +531,46 @@ AM_CONDITIONAL([FPM], [test "x$enable_fpm" = "xyes"])
#
# Python for clippy
#
AC_DEFUN([FRR_PYTHON_CHECK_WORKING], [
AC_MSG_CHECKING([whether we found a working Python version])
AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([
#include <Python.h>
#if PY_VERSION_HEX < 0x02070000
#error python too old
#endif
int main(void);
],
[
{
Py_Initialize();
return 0;
}
])], [
# some python installs are missing the zlib dependency...
PYTHON_LIBS="${PYTHON_LIBS} -lz"
AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([
#include <Python.h>
#if PY_VERSION_HEX < 0x02070000
#error python too old
#endif
int main(void);
],
[
{
Py_Initialize();
return 0;
}
])], [
m4_if([$1], [], [
PYTHONCONFIG=""
unset PYTHON_LIBS
unset PYTHON_CFLAGS
], [$1])
])
])
])
AS_IF([test "$host" = "$build"], [
PYTHONCONFIG=""
@ -538,60 +578,40 @@ AS_IF([test "$host" = "$build"], [
# 1. try python3, but respect the user's preference on which minor ver
# 2. try python, which might be py3 or py2 again on the user's preference
# 3. try python2 (can really only be 2.7 but eh)
# 4. try 3.5 > 3.4 > 3.3 > 3.2 > 2.7 through pkg-config (no user pref)
# 4. try 3.6 > 3.5 > 3.4 > 3.3 > 3.2 > 2.7 through pkg-config (no user pref)
#
# (AX_PYTHON_DEVEL has no clue about py3 vs py2)
# (AX_PYTHON does not do what we need)
AC_CHECK_TOOLS([PYTHONCONFIG], [python3-config python-config python2-config])
AC_CHECK_TOOLS([PYTHONCONFIG], [ \
python3-config \
python-config \
python2-config \
python3.6-config \
python3.5-config \
python3.4-config \
python3.3-config \
python3.2-config \
python2.7-config ])
if test -n "$PYTHONCONFIG"; then
PYTHON_CFLAGS="`\"${PYTHONCONFIG}\" --includes`"
PYTHON_LIBS="`\"${PYTHONCONFIG}\" --libs`"
PYTHON_LIBS="`\"${PYTHONCONFIG}\" --ldflags`"
AC_MSG_CHECKING([whether we found a working Python version])
AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([
#include <Python.h>
#if PY_VERSION_HEX < 0x02070000
#error python too old
#endif
int main(void);
],
[
{
Py_Initialize();
return 0;
}
])], [
PYTHONCONFIG=""
unset PYTHON_LIBS
unset PYTHON_CFLAGS
])
FRR_PYTHON_CHECK_WORKING([])
fi
if test -z "$PYTHONCONFIG"; then
PKG_CHECK_MODULES([PYTHON], python-3.6, [], [
PKG_CHECK_MODULES([PYTHON], python-3.5, [], [
PKG_CHECK_MODULES([PYTHON], python-3.4, [], [
PKG_CHECK_MODULES([PYTHON], python-3.3, [], [
PKG_CHECK_MODULES([PYTHON], python-3.2, [], [
PKG_CHECK_MODULES([PYTHON], python-2.7, [], [
AC_MSG_FAILURE([could not find python-config or pkg-config python, please install Python development files from libpython-dev or similar])
])])])])])
])])])])])])
AC_MSG_CHECKING([whether we found a working Python version])
AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([
#include <Python.h>
#if PY_VERSION_HEX < 0x02070000
#error python too old
#endif
int main(void);
],
[
{
Py_Initialize();
return 0;
}
])], [
FRR_PYTHON_CHECK_WORKING([
AC_MSG_FAILURE([could not find python-config or pkg-config python, please install Python development files from libpython-dev or similar])
])
fi