From ed6d65fa84a5e40ef89fea96e3c795b35a95e44e Mon Sep 17 00:00:00 2001
From: Bardur Arantsson <bardur@scientician.net>
Date: Mon, 8 Jun 2015 07:19:47 +0200
Subject: Use compile-to-library trick to reduce compilation time

Before we would be compiling most of the game engine
code twice because of the test harness.

In my totally non-rigorous benchmark this reduced the compilation time
rather drastically from ~162s to ~96s. (Using a single CPU for
compilation.)
---
 src/CMakeLists.txt | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

(limited to 'src/CMakeLists.txt')

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 9221e109..dcd1e518 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -124,6 +124,10 @@ SET(SRCS_TESTS
   ../tests/lua_get_level.cc
 )
 
+ADD_LIBRARY(game
+  ${SRCS_COMMON}
+)
+
 # Need a few additional source files for Windows.
 if(WIN32)
   SET(SRCS ${SRCS} main-win.c)
@@ -142,12 +146,12 @@ if(WIN32)
 endif(WIN32)
 
 # tome executable
-ADD_EXECUTABLE(tome ${EXECUTABLE_OPTIONS} ${SRCS_COMMON} ${SRCS_PROGRAM})
-TARGET_LINK_LIBRARIES(tome squelch ${LIBS})
+ADD_EXECUTABLE(tome ${EXECUTABLE_OPTIONS} ${SRCS_PROGRAM})
+TARGET_LINK_LIBRARIES(tome game squelch ${LIBS})
 
 # test harness executable
-ADD_EXECUTABLE(harness ${EXECUTABLE_OPTIONS} ${SRCS_COMMON} ${SRCS_TESTS})
-TARGET_LINK_LIBRARIES(harness squelch ${LIBS})
+ADD_EXECUTABLE(harness ${EXECUTABLE_OPTIONS} ${SRCS_TESTS})
+TARGET_LINK_LIBRARIES(harness game squelch ${LIBS})
 
 # Installation
 INSTALL(TARGETS tome
-- 
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