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Commit | Line | Data |
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45da32d7 DL |
1 | dnl FRR Python autoconf magic |
2 | dnl 2019 David Lamparter for NetDEF, Inc. | |
3 | dnl SPDX-License-Identifier: GPL-2.0-or-later | |
4 | ||
5 | dnl the _ at the beginning will be cut off (to support the empty version string) | |
bc76ad3f | 6 | 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]) |
45da32d7 DL |
7 | |
8 | dnl check basic interpreter properties (py2/py3) | |
9 | dnl doubles as simple check whether the interpreter actually works | |
10 | dnl also swaps in the full path to the interpreter | |
11 | dnl arg1: if-true, arg2: if-false | |
12 | AC_DEFUN([_FRR_PYTHON_INTERP], [dnl | |
13 | AC_ARG_VAR([PYTHON], [Python interpreter to use])dnl | |
14 | AC_MSG_CHECKING([python interpreter $PYTHON]) | |
15 | AC_RUN_LOG(["$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))']) | |
16 | py2=$ac_status | |
17 | _py2_full="`cat conftest.pyver 2>/dev/null`" | |
18 | rm -f "conftest.pyver" >/dev/null 2>/dev/null | |
19 | ||
20 | AC_RUN_LOG(["$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))']) | |
21 | py3=$ac_status | |
22 | _py3_full="`cat conftest.pyver 2>/dev/null`" | |
23 | rm -f "conftest.pyver" >/dev/null 2>/dev/null | |
24 | ||
25 | case "p${py2}p${py3}" in | |
26 | p0p1) frr_cv_python=python2 | |
27 | _python_full="$_py2_full" ;; | |
28 | p1p0) frr_cv_python=python3 | |
29 | _python_full="$_py3_full" ;; | |
30 | *) frr_cv_python=none ;; | |
31 | esac | |
32 | ||
33 | if test "$frr_cv_python" = none; then | |
34 | AC_MSG_RESULT([not working]) | |
35 | $2 | |
36 | else | |
37 | test -n "$_python_full" -a -x "$_python_full" && PYTHON="$_python_full" | |
38 | AC_MSG_RESULT([$PYTHON ($frr_cv_python)]) | |
39 | $1 | |
40 | fi | |
41 | ||
42 | dnl return value | |
43 | test "$frr_cv_python" != none | |
44 | ]) | |
45 | ||
46 | dnl check whether $PYTHON has modules available | |
47 | dnl arg1: list of modules (space separated) | |
48 | dnl arg2: if all true, arg3: if any missing | |
49 | dnl also sets frr_py_mod_<name> to "true" or "false" | |
50 | AC_DEFUN([FRR_PYTHON_MODULES], [ | |
51 | result=true | |
52 | for pymod in $1; do | |
53 | AC_MSG_CHECKING([whether $PYTHON module $pymod is available]) | |
54 | AC_RUN_LOG(["$PYTHON" -c "import $pymod"]) | |
55 | sane="`echo \"$pymod\" | tr -c '[a-zA-Z0-9\n]' '_'`" | |
56 | if test "$ac_status" -eq 0; then | |
57 | AC_MSG_RESULT([yes]) | |
58 | eval frr_py_mod_$sane=true | |
59 | else | |
60 | AC_MSG_RESULT([no]) | |
61 | eval frr_py_mod_$sane=false | |
62 | result=false | |
63 | fi | |
64 | done | |
65 | if $result; then | |
66 | m4_default([$2], [:]) | |
67 | else | |
68 | m4_default([$3], [:]) | |
69 | fi | |
70 | $result | |
71 | ]) | |
72 | ||
73 | dnl check whether $PYTHON has modules available | |
74 | dnl arg1: list of modules (space separated) | |
75 | dnl arg2: command line parameters for executing | |
76 | dnl arg3: if all true, arg4: if any missing | |
77 | dnl also sets frr_py_modexec_<name> to "true" or "false" | |
78 | AC_DEFUN([FRR_PYTHON_MOD_EXEC], [ | |
79 | result=true | |
80 | for pymod in $1; do | |
81 | AC_MSG_CHECKING([whether $PYTHON module $pymod is executable]) | |
82 | AC_RUN_LOG(["$PYTHON" -m "$pymod" $2 > /dev/null]) | |
83 | sane="`echo \"$pymod\" | tr -c '[a-zA-Z0-9\n]' '_'`" | |
84 | if test "$ac_status" -eq 0; then | |
85 | AC_MSG_RESULT([yes]) | |
86 | eval frr_py_modexec_$sane=true | |
87 | else | |
88 | AC_MSG_RESULT([no]) | |
89 | eval frr_py_modexec_$sane=false | |
90 | result=false | |
91 | fi | |
92 | done | |
93 | if $result; then | |
94 | m4_default([$3], [:]) | |
95 | else | |
96 | m4_default([$4], [:]) | |
97 | fi | |
98 | $result | |
99 | ]) | |
100 | ||
101 | dnl check whether we can build & link python bits | |
102 | dnl input: PYTHON_CFLAGS and PYTHON_LIBS | |
103 | AC_DEFUN([_FRR_PYTHON_DEVENV], [ | |
104 | result=true | |
105 | AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([ | |
106 | #include <Python.h> | |
107 | #if PY_VERSION_HEX < 0x02070000 | |
108 | #error python too old | |
109 | #endif | |
110 | int main(void); | |
111 | ], | |
112 | [ | |
113 | { | |
114 | Py_Initialize(); | |
115 | return 0; | |
116 | } | |
117 | ])], [ | |
118 | # some python installs are missing the zlib dependency... | |
119 | PYTHON_LIBS="${PYTHON_LIBS} -lz" | |
120 | AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([ | |
121 | #include <Python.h> | |
122 | #if PY_VERSION_HEX < 0x02070000 | |
123 | #error python too old | |
124 | #endif | |
125 | int main(void); | |
126 | ], | |
127 | [ | |
128 | { | |
129 | Py_Initialize(); | |
130 | return 0; | |
131 | } | |
132 | ])], [ | |
133 | result=false | |
134 | AC_MSG_RESULT([no]) | |
135 | ], [:]) | |
136 | ], [:]) | |
137 | ||
138 | if $result; then | |
139 | AC_LINK_IFELSE_FLAGS([$PYTHON_CFLAGS], [$PYTHON_LIBS], [AC_LANG_PROGRAM([ | |
140 | #include <Python.h> | |
141 | #if PY_VERSION_HEX != $1 | |
142 | #error python version mismatch | |
143 | #endif | |
144 | int main(void); | |
145 | ], | |
146 | [ | |
147 | { | |
148 | Py_Initialize(); | |
149 | return 0; | |
150 | } | |
151 | ])], [ | |
152 | result=false | |
153 | AC_MSG_RESULT([version mismatch]) | |
154 | ], [ | |
155 | AC_MSG_RESULT([yes]) | |
156 | ]) | |
157 | fi | |
158 | ||
159 | if $result; then | |
160 | m4_default([$2], [:]) | |
161 | else | |
162 | m4_default([$3], [ | |
163 | unset PYTHON_LIBS | |
164 | unset PYTHON_CFLAGS | |
165 | ]) | |
166 | fi | |
167 | ]) | |
168 | ||
169 | AC_DEFUN([_FRR_PYTHON_GETDEV], [dnl | |
170 | AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl | |
171 | ||
172 | py_abi="` \"$1\" -c \"import sys; print(getattr(sys, 'abiflags', ''))\"`" | |
173 | py_hex="` \"$1\" -c \"import sys; print(hex(sys.hexversion))\"`" | |
174 | py_ldver="` \"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('LDVERSION') or '')\"`" | |
175 | py_ver="` \"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('VERSION') or '')\"`" | |
176 | py_bindir="`\"$1\" -c \"import sysconfig; print(sysconfig.get_config_var('BINDIR') or '')\"`" | |
177 | test -z "$py_bindir" || py_bindir="$py_bindir/" | |
178 | echo "py_abi=${py_abi} py_ldver=${py_ldver} py_ver=${py_ver} py_bindir=${py_bindir}" >&AS_MESSAGE_LOG_FD | |
179 | ||
180 | py_found=false | |
181 | ||
182 | for tryver in "${py_ldver}" "${py_ver}"; do | |
183 | pycfg="${py_bindir}python${tryver}-config" | |
184 | AC_MSG_CHECKING([whether ${pycfg} is available]) | |
185 | if "$pycfg" --configdir >/dev/null 2>/dev/null; then | |
186 | AC_MSG_RESULT([yes]) | |
187 | ||
188 | PYTHON_CFLAGS="`\"$pycfg\" --includes`" | |
838cb35e MR |
189 | minor_ver=${py_ver#*\.} |
190 | if test $((minor_ver)) -gt 7; then | |
6914937e MR |
191 | PYTHON_LIBS="`\"$pycfg\" --ldflags --embed`" |
192 | else | |
193 | PYTHON_LIBS="`\"$pycfg\" --ldflags`" | |
194 | fi | |
45da32d7 DL |
195 | |
196 | AC_MSG_CHECKING([whether ${pycfg} provides a working build environment]) | |
197 | _FRR_PYTHON_DEVENV([$py_hex], [ | |
198 | py_found=true | |
199 | break | |
200 | ]) | |
201 | else | |
202 | AC_MSG_RESULT([no]) | |
203 | fi | |
204 | ||
205 | pkg_failed=no | |
206 | AC_MSG_CHECKING([whether pkg-config python-${tryver} is available]) | |
207 | unset PYTHON_CFLAGS | |
208 | unset PYTHON_LIBS | |
a82d704b | 209 | pkg="python-${tryver}-embed" |
45da32d7 DL |
210 | pkg="${pkg%-}" |
211 | _PKG_CONFIG([PYTHON_CFLAGS], [cflags], [${pkg}]) | |
212 | _PKG_CONFIG([PYTHON_LIBS], [libs], [${pkg}]) | |
213 | if test $pkg_failed = no; then | |
214 | AC_MSG_RESULT([yes]) | |
215 | ||
216 | PYTHON_CFLAGS=$pkg_cv_PYTHON_CFLAGS | |
217 | PYTHON_LIBS=$pkg_cv_PYTHON_LIBS | |
218 | ||
219 | AC_MSG_CHECKING([whether pkg-config python-${tryver} provides a working build environment]) | |
220 | _FRR_PYTHON_DEVENV([$py_hex], [ | |
221 | py_found=true | |
222 | break | |
223 | ]) | |
224 | else | |
225 | AC_MSG_RESULT([no]) | |
226 | fi | |
227 | done | |
228 | ||
229 | if $py_found; then | |
230 | m4_default([$2], [:]) | |
231 | else | |
232 | unset PYTHON_CFLAGS | |
233 | unset PYTHON_LIBS | |
234 | m4_default([$3], [:]) | |
235 | fi | |
236 | ]) | |
237 | ||
238 | dnl just find python without checking headers/libs | |
239 | AC_DEFUN([FRR_PYTHON], [ | |
240 | dnl user override | |
241 | if test "x$PYTHON" != "x"; then | |
242 | _FRR_PYTHON_INTERP([], [ | |
243 | AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but not working]) | |
244 | ]) | |
245 | else | |
246 | for frr_pyver in _FRR_PY_VERS; do | |
247 | PYTHON="python${frr_pyver#_}" | |
248 | _FRR_PYTHON_INTERP([break]) | |
249 | PYTHON=":" | |
250 | done | |
251 | if test "$PYTHON" = ":"; then | |
252 | AC_MSG_ERROR([no working python version found]) | |
253 | fi | |
254 | fi | |
255 | AC_SUBST([PYTHON]) | |
256 | ]) | |
257 | ||
258 | dnl find python with checking headers/libs | |
259 | AC_DEFUN([FRR_PYTHON_DEV], [dnl | |
260 | AC_ARG_VAR([PYTHON_CFLAGS], [C compiler flags for Python])dnl | |
261 | AC_ARG_VAR([PYTHON_LIBS], [linker flags for Python])dnl | |
262 | ||
263 | dnl user override | |
264 | if test "x$PYTHON" != "x"; then | |
265 | _FRR_PYTHON_INTERP([], [ | |
266 | AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but not working]) | |
267 | ]) | |
268 | _FRR_PYTHON_GETDEV([$PYTHON], [], [ | |
269 | AC_MSG_ERROR([PYTHON ($PYTHON) explicitly specified but development environment not working]) | |
270 | ]) | |
271 | else | |
272 | for frr_pyver in _FRR_PY_VERS; do | |
273 | PYTHON="python${frr_pyver#_}" | |
274 | _FRR_PYTHON_INTERP([ | |
275 | _FRR_PYTHON_GETDEV([$PYTHON], [ | |
276 | break | |
277 | ]) | |
278 | ]) | |
279 | PYTHON=":" | |
280 | done | |
281 | if test "$PYTHON" = ":"; then | |
282 | AC_MSG_ERROR([no working python version found]) | |
283 | fi | |
284 | fi | |
285 | ||
286 | AC_SUBST([PYTHON_CFLAGS]) | |
287 | AC_SUBST([PYTHON_LIBS]) | |
288 | AC_SUBST([PYTHON]) | |
289 | ]) |