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-rw-r--r--m4/ax_python.m4289
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diff --git a/m4/ax_python.m4 b/m4/ax_python.m4
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+dnl FRR Python autoconf magic
+dnl 2019 David Lamparter for NetDEF, Inc.
+dnl SPDX-License-Identifier: GPL-2.0-or-later
+
+dnl the _ at the beginning will be cut off (to support the empty version string)
+m4_define_default([_FRR_PY_VERS], [_3 _3.10 _3.9 _3.8 _3.7 _3.6 _3.5 _3.4 _3.3 _3.2 _ _2 _2.7])
+
+dnl check basic interpreter properties (py2/py3)
+dnl doubles as simple check whether the interpreter actually works
+dnl also swaps in the full path to the interpreter
+dnl arg1: if-true, arg2: if-false
+AC_DEFUN([_FRR_PYTHON_INTERP], [dnl
+AC_ARG_VAR([PYTHON], [Python interpreter to use])dnl
+ AC_MSG_CHECKING([python interpreter $PYTHON])
+ AC_RUN_LOG(["$PYTHON" -c 'import sys; open("conftest.pyver", "w").write(sys.executable or ""); sys.exit(not (sys.version_info.major == 2 and sys.version_info.minor >= 7))'])
+ py2=$ac_status
+ _py2_full="`cat conftest.pyver 2>/dev/null`"
+ rm -f "conftest.pyver" >/dev/null 2>/dev/null
+
+ AC_RUN_LOG(["$PYTHON" -c 'import sys; open("conftest.pyver", "w").write(sys.executable or ""); sys.exit(not ((sys.version_info.major == 3 and sys.version_info.minor >= 2) or sys.version_info.major > 3))'])
+ py3=$ac_status
+ _py3_full="`cat conftest.pyver 2>/dev/null`"
+ rm -f "conftest.pyver" >/dev/null 2>/dev/null
+
+ case "p${py2}p${py3}" in
+ p0p1) frr_cv_python=python2
+ _python_full="$_py2_full" ;;
+ p1p0) frr_cv_python=python3
+ _python_full="$_py3_full" ;;
+ *) frr_cv_python=none ;;
+ esac
+
+ if test "$frr_cv_python" = none; then
+ AC_MSG_RESULT([not working])
+ $2
+ else
+ test -n "$_python_full" -a -x "$_python_full" && PYTHON="$_python_full"
+ AC_MSG_RESULT([$PYTHON ($frr_cv_python)])
+ $1
+ fi
+
+ dnl return value
+ test "$frr_cv_python" != none
+])
+
+dnl check whether $PYTHON has modules available
+dnl arg1: list of modules (space separated)
+dnl arg2: if all true, arg3: if any missing
+dnl also sets frr_py_mod_<name> to "true" or "false"
+AC_DEFUN([FRR_PYTHON_MODULES], [
+ result=true
+ for pymod in $1; do
+ AC_MSG_CHECKING([whether $PYTHON module $pymod is available])
+ AC_RUN_LOG(["$PYTHON" -c "import $pymod"])
+ sane="`echo \"$pymod\" | tr -c '[a-zA-Z0-9\n]' '_'`"
+ if test "$ac_status" -eq 0; then
+ AC_MSG_RESULT([yes])
+ eval frr_py_mod_$sane=true
+ else
+ AC_MSG_RESULT([no])
+ eval frr_py_mod_$sane=false
+ result=false
+ fi
+ done
+ if $result; then
+ m4_default([$2], [:])
+ else
+ m4_default([$3], [:])
+ fi
+ $result
+])
+
+dnl check whether $PYTHON has modules available
+dnl arg1: list of modules (space separated)
+dnl arg2: command line parameters for executing
+dnl arg3: if all true, arg4: if any missing
+dnl also sets frr_py_modexec_<name> to "true" or "false"
+AC_DEFUN([FRR_PYTHON_MOD_EXEC], [
+ result=true
+ for pymod in $1; do
+ AC_MSG_CHECKING([whether $PYTHON module $pymod is executable])
+ AC_RUN_LOG(["$PYTHON" -m "$pymod" $2 > /dev/null])
+ sane="`echo \"$pymod\" | tr -c '[a-zA-Z0-9\n]' '_'`"
+ if test "$ac_status" -eq 0; then
+ AC_MSG_RESULT([yes])
+ eval frr_py_modexec_$sane=true
+ else
+ AC_MSG_RESULT([no])
+ eval frr_py_modexec_$sane=false
+ result=false
+ fi
+ done
+ if $result; then
+ m4_default([$3], [:])
+ else
+ m4_default([$4], [:])
+ fi
+ $result
+])
+
+dnl check whether we can build & link python bits
+dnl input: PYTHON_CFLAGS and PYTHON_LIBS
+AC_DEFUN([_FRR_PYTHON_DEVENV], [
+ result=true
+ AC_LINK_IFELSE_FLAGS([$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;
+}
+])], [
+ result=false
+ AC_MSG_RESULT([no])
+ ], [:])
+ ], [:])
+
+ if $result; then
+ AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([
+#include <Python.h>
+#if PY_VERSION_HEX != $1
+#error python version mismatch
+#endif
+int main(void);
+],
+[
+{
+ Py_Initialize();
+ return 0;
+}
+])], [
+ result=false
+ AC_MSG_RESULT([version mismatch])
+ ], [
+ AC_MSG_RESULT([yes])
+ ])
+ fi
+
+ if $result; then
+ m4_default([$2], [:])
+ else
+ m4_default([$3], [
+ unset PYTHON_LIBS
+ unset PYTHON_CFLAGS
+ ])
+ fi
+])
+
+AC_DEFUN([_FRR_PYTHON_GETDEV], [dnl
+AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+
+ py_abi="` \"$1\" -c \"import sys; print(getattr(sys, 'abiflags', ''))\"`"
+ py_hex="` \"$1\" -c \"import sys; print(hex(sys.hexversion))\"`"
+ py_ldver="` \"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('LDVERSION') or '')\"`"
+ py_ver="` \"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('VERSION') or '')\"`"
+ py_bindir="`\"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('BINDIR') or '')\"`"
+ test -z "$py_bindir" || py_bindir="$py_bindir/"
+ echo "py_abi=${py_abi} py_ldver=${py_ldver} py_ver=${py_ver} py_bindir=${py_bindir}" >&AS_MESSAGE_LOG_FD
+
+ py_found=false
+
+ for tryver in "${py_ldver}" "${py_ver}"; do
+ pycfg="${py_bindir}python${tryver}-config"
+ AC_MSG_CHECKING([whether ${pycfg} is available])
+ if "$pycfg" --configdir >/dev/null 2>/dev/null; then
+ AC_MSG_RESULT([yes])
+
+ PYTHON_CFLAGS="`\"$pycfg\" --includes`"
+ minor_ver=${py_ver#*\.}
+ if test $((minor_ver)) -gt 7; then
+ PYTHON_LIBS="`\"$pycfg\" --ldflags --embed`"
+ else
+ PYTHON_LIBS="`\"$pycfg\" --ldflags`"
+ fi
+
+ AC_MSG_CHECKING([whether ${pycfg} provides a working build environment])
+ _FRR_PYTHON_DEVENV([$py_hex], [
+ py_found=true
+ break
+ ])
+ else
+ AC_MSG_RESULT([no])
+ fi
+
+ pkg_failed=no
+ AC_MSG_CHECKING([whether pkg-config python-${tryver} is available])
+ unset PYTHON_CFLAGS
+ unset PYTHON_LIBS
+ pkg="python-${tryver}-embed"
+ pkg="${pkg%-}"
+ _PKG_CONFIG([PYTHON_CFLAGS], [cflags], [${pkg}])
+ _PKG_CONFIG([PYTHON_LIBS], [libs], [${pkg}])
+ if test $pkg_failed = no; then
+ AC_MSG_RESULT([yes])
+
+ PYTHON_CFLAGS=$pkg_cv_PYTHON_CFLAGS
+ PYTHON_LIBS=$pkg_cv_PYTHON_LIBS
+
+ AC_MSG_CHECKING([whether pkg-config python-${tryver} provides a working build environment])
+ _FRR_PYTHON_DEVENV([$py_hex], [
+ py_found=true
+ break
+ ])
+ else
+ AC_MSG_RESULT([no])
+ fi
+ done
+
+ if $py_found; then
+ m4_default([$2], [:])
+ else
+ unset PYTHON_CFLAGS
+ unset PYTHON_LIBS
+ m4_default([$3], [:])
+ fi
+])
+
+dnl just find python without checking headers/libs
+AC_DEFUN([FRR_PYTHON], [
+ dnl user override
+ if test "x$PYTHON" != "x"; then
+ _FRR_PYTHON_INTERP([], [
+ AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but not working])
+ ])
+ else
+ for frr_pyver in _FRR_PY_VERS; do
+ PYTHON="python${frr_pyver#_}"
+ _FRR_PYTHON_INTERP([break])
+ PYTHON=":"
+ done
+ if test "$PYTHON" = ":"; then
+ AC_MSG_ERROR([no working python version found])
+ fi
+ fi
+ AC_SUBST([PYTHON])
+])
+
+dnl find python with checking headers/libs
+AC_DEFUN([FRR_PYTHON_DEV], [dnl
+AC_ARG_VAR([PYTHON_CFLAGS], [C compiler flags for Python])dnl
+AC_ARG_VAR([PYTHON_LIBS], [linker flags for Python])dnl
+
+ dnl user override
+ if test "x$PYTHON" != "x"; then
+ _FRR_PYTHON_INTERP([], [
+ AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but not working])
+ ])
+ _FRR_PYTHON_GETDEV([$PYTHON], [], [
+ AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but development environment not working])
+ ])
+ else
+ for frr_pyver in _FRR_PY_VERS; do
+ PYTHON="python${frr_pyver#_}"
+ _FRR_PYTHON_INTERP([
+ _FRR_PYTHON_GETDEV([$PYTHON], [
+ break
+ ])
+ ])
+ PYTHON=":"
+ done
+ if test "$PYTHON" = ":"; then
+ AC_MSG_ERROR([no working python version found])
+ fi
+ fi
+
+ AC_SUBST([PYTHON_CFLAGS])
+ AC_SUBST([PYTHON_LIBS])
+ AC_SUBST([PYTHON])
+])
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 18:44:47 +0000