Index: head/math/plplot/files/patch-cmake_modules_pkg-config.cmake
===================================================================
--- head/math/plplot/files/patch-cmake_modules_pkg-config.cmake	(nonexistent)
+++ head/math/plplot/files/patch-cmake_modules_pkg-config.cmake	(revision 485857)
@@ -0,0 +1,19 @@
+The *internal* _pkg_check_modules_internal macro of cmake gained another 
+parameter in cmake-3.13.
+
+https://gitlab.kitware.com/cmake/cmake/commit/7aa26cf0e9319be3f7785763eb3699823453eb60
+
+--- cmake/modules/pkg-config.cmake.orig	2018-11-25 12:01:15 UTC
++++ cmake/modules/pkg-config.cmake
+@@ -122,8 +122,10 @@ macro(pkg_check_pkgconfig _package _include_DIR _link_
+     _pkg_check_modules_internal(0 0 ${_prefix} "${_package}")
+   elseif(CMAKE_VERSION VERSION_LESS "3.6")
+     _pkg_check_modules_internal(0 0 0 0 ${_prefix} "${_package}")
+-  else(CMAKE_VERSION VERSION_LESS "3.1")
++  elseif(CMAKE_VERSION VERSION_LESS "3.13")
+     _pkg_check_modules_internal(0 0 0 0 0 ${_prefix} "${_package}")
++  else(CMAKE_VERSION VERSION_LESS "3.1")
++    _pkg_check_modules_internal(0 0 0 0 0 0 ${_prefix} "${_package}")
+   endif(CMAKE_VERSION VERSION_LESS "3.1")
+ 
+   if(${_prefix}_FOUND)

Property changes on: head/math/plplot/files/patch-cmake_modules_pkg-config.cmake
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+yes
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