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-rw-r--r--doc/automake.texi19
1 files changed, 12 insertions, 7 deletions
diff --git a/doc/automake.texi b/doc/automake.texi
index 0a0da6168..59bc2f8c7 100644
--- a/doc/automake.texi
+++ b/doc/automake.texi
@@ -7882,17 +7882,22 @@ The Python version number, in the form @var{major}.@var{minor}
@item PYTHON_PREFIX
@itemx PYTHON_EXEC_PREFIX
+@opindex --with-python-sys-prefix
@opindex --with-python_prefix
@opindex --with-python_exec_prefix
@vindex sys.prefix @r{Python variable}
@vindex sys.exec_prefix @r{Python variable}
-The value of Python's @samp{sys.prefix} (resp.@:
-@samp{sys.exec_prefix}) variable. Sometimes the same as the standard
-@samp{$@{prefix@}} (@samp{$@{exec_prefix@}}), but differs on some
-platforms such as Mac@tie{}OS@tie{}x (where Python is usually
-installed as a Framework). Can be set explicitly with the
-@option{--with-python_prefix} (@option{--with-python_exec_prefix})
-@file{configure} option.
+With no special options given, these have values @samp{$@{prefix@}}
+and @samp{$@{exec_prefix@}}, respectively (unexpanded; see below).
+
+The @file{configure} options @option{--with-python_prefix}
+and @option{--with-python_exec_prefix} set them to an explicit value.
+
+The @file{configure} option @option{--with-python-sys-prefix} set them
+to the values of Python's @samp{sys.prefix} and @samp{sys.exec_prefix}
+variables. These often differ from @samp{$@{prefix@}} and
+@samp{$@{exec_prefix@}}, e.g., on platforms such as Mac@tie{}OS@tie{}x
+(where Python is usually installed as a Framework).
@item PYTHON_PLATFORM
@vindex sys.platform @r{Python variable}