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40c7e23be8
There is subtle difference between our CTNG_PYTHON and the AX_PYTHON on which it is based. The latter uses AC_CHECK_PROGS() which sets PYTHON_BIN to the name of the executable. We use AC_PATH_PROGS() which sets PYTHON_BIN to the full path of the executable. Because the name of the executable is the same as the library AX_PYTHON uses this when looking for the library with AC_CHECK_LIB() which magics itself into a linker flag like `-lpython3.11` but our version ends up with a nonsensical `-l/usr/bin/python3.11` so the check fails and we keep iterating repeating the same wrong check for every tested python version. We can't just switch to using AC_CHECK_PROGS() because we do want to use the variable set by AC_PATH_PROGS() to set the full path in paths.sh. Ultimately we could probably switch to using the upstream AX_PYTHON macro (https://www.gnu.org/software/autoconf-archive/ax_python.html) and figure out a better way of getting the full path of the exectuable but for now add an extra AC_CHECK_PROGS() to set a different variable and use that for AC_CHECK_LIB(). Signed-off-by: Chris Packham <judge.packham@gmail.com>
114 lines
4.4 KiB
Plaintext
114 lines
4.4 KiB
Plaintext
# ===========================================================================
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# Based on: https://www.gnu.org/software/autoconf-archive/ax_python.html
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# ===========================================================================
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#
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# SYNOPSIS
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#
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# CTNG_PYTHON
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#
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# DESCRIPTION
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#
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# This macro does a complete Python development environment check.
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#
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# It checks for all known versions. When it finds an executable, it looks
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# to find the header files and library.
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#
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# It sets PYTHON_BIN to the name of the python executable,
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# PYTHON_INCLUDE_DIR to the directory holding the header files, and
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# PYTHON_LIB to the name of the Python library.
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#
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# This macro calls AC_SUBST on PYTHON_BIN (via AC_CHECK_PROG),
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# PYTHON_INCLUDE_DIR and PYTHON_LIB.
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#
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# Also calls CTNG_SET_KCONFIG_OPTION to set KCONFIG_python for
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# crosstool-ng.
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#
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# LICENSE
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#
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# Copyright (c) 2008 Michael Tindal
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# Copyright (c) 2023 Bryan Hundven
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation; either version 2 of the License, or (at your
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# option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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# Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program. If not, see <https://www.gnu.org/licenses/>.
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#
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# As a special exception, the respective Autoconf Macro's copyright owner
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# gives unlimited permission to copy, distribute and modify the configure
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# scripts that are the output of Autoconf when processing the Macro. You
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# need not follow the terms of the GNU General Public License when using
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# or distributing such scripts, even though portions of the text of the
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# Macro appear in them. The GNU General Public License (GPL) does govern
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# all other use of the material that constitutes the Autoconf Macro.
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#
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# This special exception to the GPL applies to versions of the Autoconf
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# Macro released by the Autoconf Archive. When you make and distribute a
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# modified version of the Autoconf Macro, you may extend this special
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# exception to the GPL to apply to your modified version as well.
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#serial 21
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AC_DEFUN([CTNG_PYTHON],
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[
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AC_MSG_CHECKING(for python build information)
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AC_MSG_RESULT([])
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for python in python3.13 python3.12 python3.11 python3.10 python3.9 python3.8 python3.7 dnl
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python3.6 python3.5 python3.4 python3.3 python3.2 python3.1 python3.0 python2.7 dnl
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python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python; do
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AC_PATH_PROGS(PYTHON_BIN, [$python])
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AC_CHECK_PROGS(PYTHON_BIN_, [$python])
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ctng_python_bin=$PYTHON_BIN
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ctng_python_bin_=$PYTHON_BIN_
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if test "$ctng_python_bin" != ""; then
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AC_CHECK_LIB($ctng_python_bin_, main, ctng_python_lib=$ctng_python_bin_, ctng_python_lib=no)
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if test "$ctng_python_lib" = "no"; then
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AC_CHECK_LIB(${ctng_python_bin_}m, main, ctng_python_lib=${ctng_python_bin_}m, ctng_python_lib=no)
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fi
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if test "$ctng_python_lib" != "no"; then
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$ctng_python_bin -c 'import sysconfig' 2>&1
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if test $? -eq 0; then
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ctng_python_header=$($ctng_python_bin -c "from sysconfig import get_config_var; print(get_config_var('CONFINCLUDEPY'))")
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else
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ctng_python_header=$($ctng_python_bin -c "from distutils.sysconfig import *; print(get_config_var('CONFINCLUDEPY'))")
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fi
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if test "$ctng_python_header" != ""; then
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break;
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fi
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fi
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fi
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done
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python=n
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AS_IF([test "$ctng_python_bin" = ""],
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ctng_python_bin=no,
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python=y)
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CTNG_SET_KCONFIG_OPTION([python])
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AS_IF([test "$ctng_python_header" = ""],
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ctng_python_header=no)
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AS_IF([test "$ctng_python_lib" = ""],
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ctng_python_lib=no)
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AC_MSG_RESULT([ results of the Python check:])
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AC_MSG_RESULT([ Binary: $ctng_python_bin])
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AC_MSG_RESULT([ Library: $ctng_python_lib])
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AC_MSG_RESULT([ Include Dir: $ctng_python_header])
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AS_IF([test "$ctng_python_header" != "no"],
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[PYTHON_INCLUDE_DIR=$ctng_python_header
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AC_SUBST(PYTHON_INCLUDE_DIR)])
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AS_IF([test "$ctng_python_lib" != "no"],
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[PYTHON_LIB=$ctng_python_lib
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AC_SUBST(PYTHON_LIB)])
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])dnl
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