Use `std::any` when compiler supports C++17 or later

[lyx.git] / config / lyxpython.m4

diff --git a/config/lyxpython.m4 b/config/lyxpython.m4
index ff92740f2a53a750ec024bece48147589bd5bf31..21d0d8a9632c6bf9099828a8153ca2d513617117 100644 (file)
--- a/config/lyxpython.m4
+++ b/config/lyxpython.m4
@@ -10,23 +10,19 @@
 # gives unlimited permission to copy and/or distribute it,
 # with or without modifications, as long as this notice is preserved.
 
-dnl The minimum version for a python2 interpreter
-m4_define(py2_ver, 2.7.0)
-dnl The minimum version for a python3 interpreter
-m4_define(py3_ver, 3.3.0)
-
-dnl Usage: LYX_PATH_PYTHON
-dnl Find a suitable Python interpreter, that is either python2 >= py2_ver
-dnl or python3 >= py3_ver. Stop with an error message if it has not been found.
-AC_DEFUN([LYX_PATH_PYTHON],
+dnl Usage: LYX_PATH_PYTHON23(PY2-MIN-VERSION, PYTHON3-MIN-VERSION)
+dnl Find a suitable Python interpreter, that is either python2 >= $1
+dnl or python3 >= $2. Stop with an error message if it has not been found.
+AC_DEFUN([LYX_PATH_PYTHON23],
  [
-  m4_define_default([_AM_PYTHON_INTERPRETER_LIST],
-[python python2 python3 python3.3 python3.2 python3.1 python3.0 python2.7 dnl
- python2.6 python2.5 python2.4 python2.3 python2.2 python2.1 python2.0])
+  m4_define(py2_ver, [patsubst($1,[\.],[,])])
+  m4_define(py3_ver, [patsubst($2,[\.],[,])])
+
+  m4_define_default([_AM_PYTHON_INTERPRETER_LIST], [python3 python2 python])
 
     if test -n "$PYTHON"; then
       # If the user set $PYTHON, use it and don't search something else.
-      AC_MSG_CHECKING([whether $PYTHON version is >= py2_ver or py3_ver])
+      AC_MSG_CHECKING([whether $PYTHON version is >= $1 or $2])
       LYX_PYTHON_CHECK_VERSION([$PYTHON],
                              [AC_MSG_RESULT([yes])],
                              [AC_MSG_RESULT([no])
@@ -35,7 +31,7 @@ AC_DEFUN([LYX_PATH_PYTHON],
     else
       # Otherwise, try each interpreter until we find one that satisfies
       # LYX_PYTHON_CHECK_VERSION.
-      AC_CACHE_CHECK([for a Python interpreter with version >= py2_ver or py3_ver],
+      AC_CACHE_CHECK([for a Python interpreter with version >= $1 or $2],
        [am_cv_pathless_PYTHON],[
        for am_cv_pathless_PYTHON in _AM_PYTHON_INTERPRETER_LIST none; do
          test "$am_cv_pathless_PYTHON" = none && break
@@ -55,9 +51,6 @@ AC_DEFUN([LYX_PATH_PYTHON],
     fi
 ])
 
-m4_define(py2_ver_list, [patsubst(py2_ver,[\.],[,])])
-m4_define(py3_ver_list, [patsubst(py3_ver,[\.],[,])])
-
 # LYX_PYTHON_CHECK_VERSION(PROG, [ACTION-IF-TRUE], [ACTION-IF-FALSE])
 # ---------------------------------------------------------------------------
 # Run ACTION-IF-TRUE if the Python interpreter PROG has version >= py2_ver or py3_ver.
@@ -65,5 +58,5 @@ m4_define(py3_ver_list, [patsubst(py3_ver,[\.],[,])])
 AC_DEFUN([LYX_PYTHON_CHECK_VERSION],
  [prog="import sys
 version = sys.version_info@<:@:3@:>@
-sys.exit(not ((py2_ver_list) <= version < (3,0,0) or version >= (py3_ver_list)))"
+sys.exit(not ((py2_ver) <= version < (3,0,0) or version >= (py3_ver)))"
   AS_IF([AM_RUN_LOG([$1 -c "$prog"])], [$2], [$3])])