[BUG FIX] Use CMAKE_INSTALL_FULL_<dir> in arpack.pc (#301)

CMAKE_INSTALL_<dir> cannot be assumed to be relative to CMAKE_INSTALL_PREFIX.
See https://github.com/jtojnar/cmake-snips#assuming-cmake_install_dir-is-relative-path.

CHANGES

@@ -1,6 +1,7 @@
 arpack-ng - 3.9.0
 
- * Please update
+[ Robert Schütz ]
+ * use CMAKE_INSTALL_FULL_<dir> in arpack.pc
 
  -- Sylvestre Ledru <sylvestre@debian.org> Mon, 07 Dec 2020 11:37:40 +0100
 

CMakeLists.txt

@@ -681,8 +681,8 @@ include(GNUInstallDirs)
 # Convert variable names to those expected by the .pc file.
 set(prefix ${CMAKE_INSTALL_PREFIX})
 set(exec_prefix \${prefix})
-set(libdir \${exec_prefix}/${CMAKE_INSTALL_LIBDIR})
-set(includedir \${prefix}/${CMAKE_INSTALL_INCLUDEDIR})
+set(libdir ${CMAKE_INSTALL_FULL_LIBDIR})
+set(includedir ${CMAKE_INSTALL_FULL_INCLUDEDIR})
 set(PACKAGE_NAME ${PROJECT_NAME})
 set(PACKAGE_VERSION ${arpack_ng_VERSION})
 set(PACKAGE_URL "https://github.com/opencollab/arpack-ng/")