From b0328ef0751b88739355aba8313e715bd57ff18c Mon Sep 17 00:00:00 2001
From: Matthias Maier <tamiko@kyomu.43-1.org>
Date: Sat, 13 Jul 2013 10:08:17 +0000
Subject: [PATCH] CMake: Split preference for static libraries in its own
 configuration toggle

git-svn-id: https://svn.dealii.org/trunk@29990 0785d39b-7218-0410-832d-ea1e28bc413d
---
 deal.II/cmake/setup_cached_variables.cmake | 25 ++++++++++++++++------
 deal.II/cmake/setup_deal_ii.cmake          | 10 ++++-----
 deal.II/doc/development/cmake.html         |  8 ++++++-
 3 files changed, 30 insertions(+), 13 deletions(-)

diff --git a/deal.II/cmake/setup_cached_variables.cmake b/deal.II/cmake/setup_cached_variables.cmake
index 0439cf354a..8b6a6d4465 100644
--- a/deal.II/cmake/setup_cached_variables.cmake
+++ b/deal.II/cmake/setup_cached_variables.cmake
@@ -33,8 +33,9 @@
 #     CMAKE_BUILD_TYPE
 #     DEAL_II_ALLOW_PLATFORM_INTROSPECTION
 #     DEAL_II_SETUP_DEFAULT_COMPILER_FLAGS
-#     DEAL_II_STATIC_EXECUTABLE
 #     BUILD_SHARED_LIBS
+#     DEAL_II_PREFER_STATIC_LIBS
+#     DEAL_II_STATIC_EXECUTABLE
 #     CMAKE_INSTALL_RPATH_USE_LINK_PATH
 #     CMAKE_C_FLAGS                     *)
 #     CMAKE_CXX_FLAGS                   *)
@@ -150,22 +151,32 @@ OPTION(DEAL_II_SETUP_DEFAULT_COMPILER_FLAGS
   )
 MARK_AS_ADVANCED(DEAL_II_SETUP_DEFAULT_COMPILER_FLAGS)
 
+SET(BUILD_SHARED_LIBS "ON" CACHE BOOL
+  "Build a shared library"
+  )
+
+OPTION(DEAL_II_PREFER_STATIC_LIBS
+  "Prefer static libraries over dynamic libraries when searching for features and corresponding link interface"
+  OFF
+  )
+MARK_AS_ADVANCED(DEAL_II_PREFER_STATIC_LIBS)
+
 OPTION(DEAL_II_STATIC_EXECUTABLE
-  "Provide a link interface that is suitable for static linkage of executables. Enabling this option forces BUILD_SHARED_LIBS=OFF"
+  "Provide a link interface that is suitable for static linkage of executables. Enabling this option forces BUILD_SHARED_LIBS=OFF and DEAL_II_PREFER_STATIC_LIBS=ON"
   OFF
   )
 MARK_AS_ADVANCED(DEAL_II_STATIC_EXECUTABLE)
 
 IF(DEAL_II_STATIC_EXECUTABLE)
   SET(BUILD_SHARED_LIBS "OFF" CACHE BOOL
-    "Build a shared library" FORCE
-    )
-ELSE()
-  SET(BUILD_SHARED_LIBS "ON" CACHE BOOL
     "Build a shared library"
+    FORCE
+    )
+  SET(DEAL_II_PREFER_STATIC_LIBS "ON" CACHE BOOL
+    "Prefer static libraries over dynamic libraries when searching for features and corresponding link interface"
+    FORCE
     )
 ENDIF()
-MARK_AS_ADVANCED(BUILD_SHARED_LIBS)
 
 
 #
diff --git a/deal.II/cmake/setup_deal_ii.cmake b/deal.II/cmake/setup_deal_ii.cmake
index 4b3f6cdbb8..346d69d51c 100644
--- a/deal.II/cmake/setup_deal_ii.cmake
+++ b/deal.II/cmake/setup_deal_ii.cmake
@@ -164,11 +164,11 @@ FOREACH(_build ${DEAL_II_BUILD_TYPES})
     )
 ENDFOREACH()
 
-#
-# Invert the search order for libraries when BUILD_SHARED_LIBS=OFF to
-# prefer static archives instead of shared libraries:
-#
-IF(NOT BUILD_SHARED_LIBS)
+IF(DEAL_II_PREFER_STATIC_LIBS)
+  #
+  # Invert the search order for libraries when DEAL_II_PREFER_STATIC_LIBS
+  # is set. This will prefer static archives instead of shared libraries:
+  #
   # TODO: Does this work on a Windows or CYGWIN target?
   LIST(REVERSE CMAKE_FIND_LIBRARY_SUFFIXES)
 ENDIF()
diff --git a/deal.II/doc/development/cmake.html b/deal.II/doc/development/cmake.html
index b169825b1d..75c7bb8451 100644
--- a/deal.II/doc/development/cmake.html
+++ b/deal.II/doc/development/cmake.html
@@ -570,12 +570,18 @@
           <code>BUILD_SHARED_LIBS</code>: If set (default),
           <acronym>deal.II</acronym> will be linked as a shared library
 
+        <li>
+        <code>DEAL_II_PREFER_STATIC_LIBS</code> (defaults to off): If set
+        to true, static archives will be preferred over dynamic libraries when
+        searching for features and corresponding link interface.
+
 	<li>
           <code>DEAL_II_STATIC_EXECUTABLE</code> (defaults to off):
           If set to true, <acronym>deal.II</acronym> will be configured in
           a way to provide a link interface that is suitable for static
           linkage of executables. Enabling this option forces
-          <code>BUILD_SHARED_LIBS=OFF</code>
+          <code>BUILD_SHARED_LIBS=OFF</code> and
+          <code>DEAL_II_PERFER_STATIC_LIBS</code>.
 
 	<li>
 	  <code>CMAKE_INSTALL_RPATH_USE_LINK_PATH</code>: If set
-- 
2.39.5