16 files changed, 23 insertions, 1 deletions
diff --git a/cmake/GetGitRevisionDescription.cmake b/cmake/GetGitRevisionDescription.cmake
index e4ac79c0..0c016cc0 100644
--- a/cmake/GetGitRevisionDescription.cmake
+++ b/cmake/GetGitRevisionDescription.cmake
@@ -30,6 +30,8 @@
 # (See accompanying file LICENSE_1_0.txt or copy at
 # http://www.boost.org/LICENSE_1_0.txt)
 
+include_guard(GLOBAL)
+
 if(__get_git_revision_description)
         return()
 endif()
diff --git a/cmake/GetGitRevisionDescription.cmake.in b/cmake/GetGitRevisionDescription.cmake.in
index 888ce13a..032dda66 100644
--- a/cmake/GetGitRevisionDescription.cmake.in
+++ b/cmake/GetGitRevisionDescription.cmake.in
@@ -13,6 +13,8 @@
 # (See accompanying file LICENSE_1_0.txt or copy at
 # http://www.boost.org/LICENSE_1_0.txt)
 
+include_guard(GLOBAL)
+
 set(HEAD_HASH)
 
 file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
diff --git a/cmake/opentrack-boilerplate.cmake b/cmake/opentrack-boilerplate.cmake
index 78d0e1dd..9ac95cb9 100644
--- a/cmake/opentrack-boilerplate.cmake
+++ b/cmake/opentrack-boilerplate.cmake
@@ -1,3 +1,5 @@
+include_guard(GLOBAL)
+
 set(opentrack-perms-file WORLD_READ OWNER_WRITE OWNER_READ GROUP_READ)
 set(opentrack-perms-dir WORLD_READ WORLD_EXECUTE OWNER_WRITE OWNER_READ OWNER_EXECUTE GROUP_READ GROUP_EXECUTE)
 set(opentrack-perms-exec "${opentrack-perms-dir}")
diff --git a/cmake/opentrack-hier.cmake b/cmake/opentrack-hier.cmake
index 734ba183..2b3159b4 100644
--- a/cmake/opentrack-hier.cmake
+++ b/cmake/opentrack-hier.cmake
@@ -7,6 +7,8 @@
 # TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
 
+include_guard(GLOBAL)
+
 set(opentrack-install-rpath "")
 if(APPLE)
     set(opentrack-hier-pfx ".")
diff --git a/cmake/opentrack-i18n.cmake b/cmake/opentrack-i18n.cmake
index c23d5d1d..2e35ba6b 100644
--- a/cmake/opentrack-i18n.cmake
+++ b/cmake/opentrack-i18n.cmake
@@ -1,3 +1,5 @@
+include_guard(GLOBAL)
+
 add_custom_target(i18n ALL)
 
 function(otr_i18n_for_target_directory n)
diff --git a/cmake/opentrack-install.cmake b/cmake/opentrack-install.cmake
index d15951e9..cd4f6278 100644
--- a/cmake/opentrack-install.cmake
+++ b/cmake/opentrack-install.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 macro(otr_install_misc path)
     install(${ARGN} DESTINATION "${path}" PERMISSIONS ${opentrack-perms-file})
 endmacro()
diff --git a/cmake/opentrack-load-user-settings.cmake b/cmake/opentrack-load-user-settings.cmake
index f1598ae1..35085b65 100644
--- a/cmake/opentrack-load-user-settings.cmake
+++ b/cmake/opentrack-load-user-settings.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 if(WIN32)
     set(__sdk_username "$ENV{USERNAME}")
 else()
diff --git a/cmake/opentrack-mrproper.cmake b/cmake/opentrack-mrproper.cmake
index faa11bd4..6efb0be3 100644
--- a/cmake/opentrack-mrproper.cmake
+++ b/cmake/opentrack-mrproper.cmake
@@ -7,6 +7,8 @@
 # TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 # PERFORMANCE OF THIS SOFTWARE.
 
+include_guard(GLOBAL)
+
 function(cleanup_build_dir)
     file(GLOB_RECURSE files LIST_DIRECTORIES TRUE RELATIVE "${CMAKE_BINARY_DIR}" "*")
 
diff --git a/cmake/opentrack-pkg-config.cmake b/cmake/opentrack-pkg-config.cmake
index 3f4c41d5..b12b786c 100644
--- a/cmake/opentrack-pkg-config.cmake
+++ b/cmake/opentrack-pkg-config.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 include(FindPkgConfig)
 
 function(otr_pkgconfig target)
diff --git a/cmake/opentrack-platform.cmake b/cmake/opentrack-platform.cmake
index 365aba62..4b7cde09 100644
--- a/cmake/opentrack-platform.cmake
+++ b/cmake/opentrack-platform.cmake
@@ -21,6 +21,8 @@
 # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 # OTHER DEALINGS IN THE SOFTWARE.
 
+include_guard(GLOBAL)
+
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
     set(CMAKE_INSTALL_PREFIX "${CMAKE_BINARY_DIR}/install" CACHE PATH "" FORCE)
     if(NOT CMAKE_BUILD_TYPE)
diff --git a/cmake/opentrack-policy.cmake b/cmake/opentrack-policy.cmake
index e4fded7a..e86cd284 100644
--- a/cmake/opentrack-policy.cmake
+++ b/cmake/opentrack-policy.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 foreach(k CMP0020 CMP0022 CMP0058 CMP0028 CMP0042 CMP0063 CMP0053 CMP0011 CMP0054 CMP0012)
     if(POLICY ${k})
         cmake_policy(SET ${k} NEW)
diff --git a/cmake/opentrack-qt.cmake b/cmake/opentrack-qt.cmake
index 8d975712..b5aecdc2 100644
--- a/cmake/opentrack-qt.cmake
+++ b/cmake/opentrack-qt.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 find_package(Qt5 REQUIRED COMPONENTS Core Network Widgets LinguistTools Gui QUIET)
 if(WIN32)
     find_package(Qt5Gui REQUIRED COMPONENTS QWindowsIntegrationPlugin)
diff --git a/cmake/opentrack-rift.cmake b/cmake/opentrack-rift.cmake
index 88adbb3e..cdcfc946 100644
--- a/cmake/opentrack-rift.cmake
+++ b/cmake/opentrack-rift.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 function(otr_rift proj opt)
     if(${opt})
         set(link-flags)
diff --git a/cmake/opentrack-variant.cmake b/cmake/opentrack-variant.cmake
index bae5a451..3ea01eaa 100644
--- a/cmake/opentrack-variant.cmake
+++ b/cmake/opentrack-variant.cmake
@@ -1,4 +1,4 @@
-# XXX that belongs in each variant's directory!
+include_guard(GLOBAL)
 
 function(otr_dist_select_variant)
     file(GLOB variants "variant/*")
diff --git a/cmake/opentrack-version.cmake b/cmake/opentrack-version.cmake
index 24970b59..a85d7ffe 100644
--- a/cmake/opentrack-version.cmake
+++ b/cmake/opentrack-version.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 include(GetGitRevisionDescription)
 
 find_package(Git QUIET)
diff --git a/cmake/opentrack-word-size.cmake b/cmake/opentrack-word-size.cmake
index 4ed82e02..e539f1cd 100644
--- a/cmake/opentrack-word-size.cmake
+++ b/cmake/opentrack-word-size.cmake
@@ -1,3 +1,4 @@
+include_guard(GLOBAL)
 if(CMAKE_SIZEOF_VOID_P GREATER 4)
     set(opentrack-64bit TRUE)
 else()