From 29ddc08ff2b5e8161f8c342cdb8fdafc9aa4a639 Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Fri, 12 May 2017 15:41:22 +0200
Subject: cmake: don't relink when no headers change

This makes release builds hella fast.
---
 cmake/opentrack-boilerplate.cmake | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/cmake/opentrack-boilerplate.cmake b/cmake/opentrack-boilerplate.cmake
index 35ef1d22..821de1ba 100644
--- a/cmake/opentrack-boilerplate.cmake
+++ b/cmake/opentrack-boilerplate.cmake
@@ -128,11 +128,12 @@ endfunction()
 function(otr_module n_)
     message(STATUS "module ${n_}")
     cmake_parse_arguments(arg
-        "STATIC;NO-COMPAT;BIN;EXECUTABLE;NO-QT;WIN32-CONSOLE;NO-INSTALL"
+        "STATIC;NO-COMPAT;BIN;EXECUTABLE;NO-QT;WIN32-CONSOLE;NO-INSTALL;RELINK"
         "LINK;COMPILE"
         "SOURCES"
         ${ARGN}
     )
+
     if(NOT "${arg_UNPARSED_ARGUMENTS}" STREQUAL "")
         message(FATAL_ERROR "otr_module bad formals: ${arg_UNPARSED_ARGUMENTS}")
     endif()
@@ -166,6 +167,12 @@ function(otr_module n_)
         add_library(${n} ${link-mode} "${${n}-all}")
     endif()
 
+    if(NOT arg_RELINK)
+        set_property(TARGET ${n} PROPERTY LINK_DEPENDS_NO_SHARED TRUE)
+    else()
+        set_property(TARGET ${n} PROPERTY LINK_DEPENDS_NO_SHARED FALSE)
+    endif()
+
     if(NOT arg_NO-QT)
         target_link_libraries(${n} ${MY_QT_LIBS})
     endif()
-- 
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