[Plplot-cvs] SF.net SVN: plplot:[12387] trunk/cmake/modules/python.cmake

[<ai...@us...>]

Revision: 12387
          http://sourceforge.net/p/plplot/code/12387
Author:   airwin
Date:     2013-06-25 19:28:34 +0000 (Tue, 25 Jun 2013)
Log Message:
-----------
Deal properly with case where CMAKE_INSTALL_PREFIX is an empty string.
(This case is typically used to generate binary distribution tarballs.)

Modified Paths:
--------------
    trunk/cmake/modules/python.cmake

Modified: trunk/cmake/modules/python.cmake
===================================================================
--- trunk/cmake/modules/python.cmake	2013-06-25 18:49:38 UTC (rev 12386)
+++ trunk/cmake/modules/python.cmake	2013-06-25 19:28:34 UTC (rev 12387)
@@ -111,11 +111,20 @@
 endif(ENABLE_python AND HAVE_NUMPY)
 
 if(ENABLE_python)
+  # if CMAKE_INSTALL_EXEC_PREFIX is an empty string, must replace
+  # it with "/" to make PYTHON_INSTALL_TEMPLATE an absolute path to be
+  # consistent with all other installation paths.
+  if(CMAKE_INSTALL_EXEC_PREFIX)
+    set(PYTHON_INSTALL_TEMPLATE "${CMAKE_INSTALL_EXEC_PREFIX}")
+  else(CMAKE_INSTALL_EXEC_PREFIX)
+    set(PYTHON_INSTALL_TEMPLATE "/")
+  endif(CMAKE_INSTALL_EXEC_PREFIX)
+
   # N.B. This is a nice way to obtain all sorts of Python information
   # using distutils.
   execute_process(
     COMMAND
-    ${PYTHON_EXECUTABLE} -c "from distutils import sysconfig; print sysconfig.get_python_lib(1,0,prefix='${CMAKE_INSTALL_EXEC_PREFIX}')"
+    ${PYTHON_EXECUTABLE} -c "from distutils import sysconfig; print sysconfig.get_python_lib(1,0,prefix='${PYTHON_INSTALL_TEMPLATE}')"
     OUTPUT_VARIABLE PYTHON_INSTDIR
     OUTPUT_STRIP_TRAILING_WHITESPACE
     )

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