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source: code/branches/unity_build/src/OrxonoxConfig.cmake @ 8689

Last change on this file since 8689 was 8677, checked in by rgrieder, 13 years ago

The COUNTER macro required for full build units was only added in GCC 4.3.
Warn the developer if using GCC < 4.3 and full build units.

  • Property svn:eol-style set to native
File size: 5.0 KB
Line 
1 #
2 #             ORXONOX - the hottest 3D action shooter ever to exist
3 #                             > www.orxonox.net <
4 #
5 #        This program is free software; you can redistribute it and/or
6 #         modify it under the terms of the GNU General Public License
7 #        as published by the Free Software Foundation; either version 2
8 #            of the License, or (at your option) any later version.
9 #
10 #       This program is distributed in the hope that it will be useful,
11 #        but WITHOUT ANY WARRANTY; without even the implied warranty of
12 #        MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13 #                 GNU General Public License for more details.
14 #
15 #   You should have received a copy of the GNU General Public License along
16 #      with this program; if not, write to the Free Software Foundation,
17 #     Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
18 #
19 #
20 #  Author:
21 #    Reto Grieder
22 #  Description:
23 #    Configures the header files OrxonoxConfig.h and SpecialConfig.h
24 #    and sets some other options. All the build related options should be
25 #    found and set here if possible.
26 #
27
28#################### Options ####################
29
30# Global switch to disable Precompiled Header Files
31# Note: PCH temporarily disabled on Mac because of severe problems
32IF(PCH_COMPILER_SUPPORT AND NOT APPLE)
33  OPTION(PCH_ENABLE "Global PCH switch" TRUE)
34ENDIF()
35
36# Global option to steer building muliple files as a single one
37# off/false: Turn off completely
38# partial:   Only combine files explicitly specified with BUILD_UNIT
39# full##:    Use ## source files per orxonox library and use manual build units
40#            for external dependencies. Example: full8 will in general use 8
41#            source files per library, but more specifically tries to occupy
42#            8 CPU threads.
43#            This is configured manually in BuildUnitsConfig.cmake
44SET(ENABLE_BUILD_UNITS "partial" CACHE STRING "Enables building multiple source files as one.")
45IF(ENABLE_BUILD_UNITS)
46  IF(NOT "${ENABLE_BUILD_UNITS}" STREQUAL "partial")
47    STRING(REGEX REPLACE "^full([1-9][0-9]?)$" "\\1" _nr_of_units "${ENABLE_BUILD_UNITS}")
48    IF("${_nr_of_units}" STREQUAL "${ENABLE_BUILD_UNITS}") # Regex match failed
49      MESSAGE(FATAL_ERROR "Unrecognised option for ENABLE_BUILD_UNITS: ${ENABLE_BUILD_UNITS}")
50    ELSE()
51      SET(NR_OF_BUILD_UNITS ${_nr_of_units})
52      IF(NOT HAVE_COUNTER_MACRO)
53        MESSAGE(WARNING "Your compiler doesn't support the __COUNTER__ macro. Full build units might not work!")
54      ENDIF()
55    ENDIF()
56  ENDIF()
57  IF(CMAKE_COMPILER_IS_GNU)
58    INCLUDE(BuildUnitsConfigGCC.cmake)
59  ELSEIF(MSVC)
60    INCLUDE(BuildUnitsConfigMSVC.cmake)
61  ENDIF()
62ENDIF()
63
64# Use WinMain() or main()?
65IF(WIN32)
66  OPTION(ORXONOX_USE_WINMAIN "Use WinMain (doesn't show console) or main" FALSE)
67ENDIF()
68
69################ Platform Config ################
70
71# Check endianness
72INCLUDE(TestBigEndian)
73TEST_BIG_ENDIAN(ORXONOX_BIG_ENDIAN)
74IF(NOT ORXONOX_BIG_ENDIAN)
75  SET(ORXONOX_LITTLE_ENDIAN TRUE)
76ENDIF()
77
78# Platforms
79SET(ORXONOX_PLATFORM_WINDOWS ${WIN32})
80SET(ORXONOX_PLATFORM_APPLE   ${APPLE})
81SET(ORXONOX_PLATFORM_UNIX    ${UNIX})
82SET(ORXONOX_PLATFORM_LINUX   ${LINUX})
83
84# Check __forceinline
85IF(MSVC)
86  INCLUDE(CheckCXXSourceCompiles)
87  SET(_source "int main() { return 0; } __forceinline void test() { return; }")
88  CHECK_CXX_SOURCE_COMPILES("${_source}" HAVE_FORCEINLINE)
89ENDIF(MSVC)
90
91# Check some non standard system includes
92INCLUDE(CheckIncludeFileCXX)
93CHECK_INCLUDE_FILE_CXX(iso646.h HAVE_ISO646_H)
94CHECK_INCLUDE_FILE_CXX(stdint.h HAVE_STDINT_H)
95
96# Part of a woraround for OS X warnings. See OrxonoxConfig.h.in
97SET(ORX_HAVE_STDINT_H ${HAVE_STDINT_H})
98
99# XCode and Visual Studio support multiple configurations. In order to tell
100# about the active one we have to define the macro for each configuration
101ADD_COMPILER_FLAGS("-DCMAKE_Debug_BUILD"          Debug)
102ADD_COMPILER_FLAGS("-DCMAKE_RelForDevs_BUILD"     RelForDevs)
103ADD_COMPILER_FLAGS("-DCMAKE_Release_BUILD"        Release)
104ADD_COMPILER_FLAGS("-DCMAKE_RelWithDebInfo_BUILD" RelWithDebInfo)
105ADD_COMPILER_FLAGS("-DCMAKE_MinSizeRel_BUILD"     MinSizeRel)
106
107############## Configured Headers ###############
108
109SET(GENERATED_FILE_COMMENT
110   "DO NOT EDIT THIS FILE! <br>
111    It has been automatically generated by CMake from OrxonoxConfig.h.in")
112# Copy and configure OrxonoxConfig which gets included in every file
113CONFIGURE_FILE(OrxonoxConfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/OrxonoxConfig.h)
114# This file only gets included by very few classes to avoid a large recompilation
115CONFIGURE_FILE(SpecialConfig.h.in ${CMAKE_CURRENT_BINARY_DIR}/SpecialConfig.h)
116
117SET(ORXONOX_CONFIG_FILES
118  ${CMAKE_CURRENT_SOURCE_DIR}/OrxonoxConfig.h.in
119  ${CMAKE_CURRENT_SOURCE_DIR}/SpecialConfig.h.in
120)
121SET(ORXONOX_CONFIG_FILES_GENERATED
122  ${CMAKE_CURRENT_BINARY_DIR}/OrxonoxConfig.h
123  ${CMAKE_CURRENT_BINARY_DIR}/SpecialConfig.h
124)
125
126# Make special target including the configured header files for Visual Studio
127IF(MSVC)
128  ADD_CUSTOM_TARGET(config
129    SOURCES
130      ${ORXONOX_CONFIG_FILES}
131      ${ORXONOX_CONFIG_FILES_GENERATED}
132  )
133ENDIF()
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