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source: code/trunk/cmake/CompilerConfigGCC.cmake @ 9302

Last change on this file since 9302 was 8729, checked in by rgrieder, 13 years ago

Merged unity_build branch back to trunk.

Features:

  • Implemented fully automatic build units to speed up compilation if requested
  • Added DOUT macro for quick debug output
  • Activated text colouring in the POSIX IOConsole
  • DeclareToluaInterface is not necessary anymore

Improvements:

  • Output levels now change appropriately when switch back and forth from dev mode
  • Log level for the file output is now also correct during startup
  • Removed some header file dependencies in core and tools to speed up compilation

no more file for command line options

  • Improved util::tribool by adapting some concepts from boost::tribool

Regressions:

  • It is not possible anymore to specify command line arguments in an extra file because we've got config values for that purpose.
  • Property svn:eol-style set to native
File size: 4.4 KB
RevLine 
[2579]1 #
[2626]2 #             ORXONOX - the hottest 3D action shooter ever to exist
3 #                             > www.orxonox.net <
[2579]4 #
[2626]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.
[2579]9 #
[2626]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.
[2579]14 #
[2626]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.
[2579]18 #
19 #
[2626]20 #  Author:
21 #    Reto Grieder, Adrian Friedli
22 #  Description:
23 #    Sets the right compiler and linker flags for GCC.
[2579]24 #
25
[5664]26INCLUDE(FlagUtilities)
[5702]27INCLUDE(CompareVersionStrings)
[8351]28INCLUDE(CheckCXXCompilerFlag)
[5664]29
[3196]30# Shortcut for CMAKE_COMPILER_IS_GNUCXX and ..._GNUC
31SET(CMAKE_COMPILER_IS_GNU TRUE)
32
[2638]33# Determine compiler version
34EXEC_PROGRAM(
35  ${CMAKE_CXX_COMPILER}
36  ARGS ${CMAKE_CXX_COMPILER_ARG1} -dumpversion
37  OUTPUT_VARIABLE GCC_VERSION
38)
39
[3196]40# GCC only supports PCH in versions 3.4 and above
41INCLUDE(CompareVersionStrings)
42COMPARE_VERSION_STRINGS("${GCC_VERSION}" "3.4.0" _compare_result)
43IF(_compare_result GREATER -1)
44  SET(PCH_COMPILER_SUPPORT TRUE)
45ENDIF()
46
[8729]47# __COUNTER__ macro was only added in GCC 4.3
48# It might be required to make full build units work
49COMPARE_VERSION_STRINGS("${GCC_VERSION}" "4.3.0" _compare_result)
50IF(_compare_result GREATER -1)
51  SET(HAVE_COUNTER_MACRO TRUE)
52ENDIF()
53
[2621]54# Also include environment flags. Could cause conflicts though
55SET_COMPILER_FLAGS("$ENV{CXXFLAGS}" CXX CACHE)
56SET_COMPILER_FLAGS("$ENV{CFLAGS}"   C   CACHE)
[2582]57
[2621]58# These flags get added to the flags above
59SET_COMPILER_FLAGS("    -g -ggdb -D_DEBUG" Debug          CACHE)
60SET_COMPILER_FLAGS("             -DNDEBUG" ReleaseAll     CACHE)
[8368]61ADD_COMPILER_FLAGS("-O2 -g -ggdb"          RelForDevs     CACHE)
62ADD_COMPILER_FLAGS("-O3 -g -ggdb"          RelWithDebInfo CACHE)
[2621]63ADD_COMPILER_FLAGS("-O3"                   Release        CACHE)
64ADD_COMPILER_FLAGS("-Os"                   MinSizeRel     CACHE)
[2582]65
[2621]66# CMake doesn't seem to set the PIC flags right on certain 64 bit systems
[8351]67IF(NOT MINGW AND ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64")
[2621]68  ADD_COMPILER_FLAGS("-fPIC" CACHE)
[2624]69ENDIF()
[2621]70
[8364]71# Never omit frame pointers that could interfere with proper stack traces
72ADD_COMPILER_FLAGS("-fno-omit-frame-pointer" CACHE)
73
[8351]74# Enable non standard floating point optimisations
75ADD_COMPILER_FLAGS("-ffast-math" CACHE)
76
77# Use SSE if possible
78# Commented because this might not work for cross compiling
79#CHECK_CXX_COMPILER_FLAG(-msse _gcc_have_sse)
80#IF(_gcc_have_sse)
81#  ADD_COMPILER_FLAGS("-msse" CACHE)
82#ENDIF()
83
84IF(NOT MINGW)
85  # Have GCC visibility?
86  CHECK_CXX_COMPILER_FLAG("-fvisibility=hidden" _gcc_have_visibility)
87  IF(_gcc_have_visibility)
88    # Note: There is a possible bug with the flag in gcc < 4.2 and Debug versions
89    COMPARE_VERSION_STRINGS("${GCC_VERSION}" "4.2.0" _compare_result)
90    IF(NOT CMAKE_BUILD_TYPE STREQUAL "Debug" OR _compare_result GREATER -1)
91      ADD_COMPILER_FLAGS("-DORXONOX_GCC_VISIBILITY -fvisibility=default -fvisibility-inlines-hidden" CACHE)
92    ENDIF()
93  ENDIF(_gcc_have_visibility)
94ENDIF()
95
[7416]96# We have some unconformant code, disable an optimisation feature
[3111]97ADD_COMPILER_FLAGS("-fno-strict-aliasing" CACHE)
[2704]98
[2896]99# For newer GCC (4.3 and above), don't display hundreds of annoying deprecated
100# messages. Other versions don't seem to show any such warnings at all.
[2988]101ADD_COMPILER_FLAGS("-Wno-deprecated" CXX CACHE)
[2896]102
[3196]103# Always show why a precompiled header file could not be used
104ADD_COMPILER_FLAGS("-Winvalid-pch" CXX CACHE)
105
[2621]106# Increase warning level if requested
[2673]107IF(EXTRA_COMPILER_WARNINGS)
[2868]108  ADD_COMPILER_FLAGS("-Wall -Wextra -Wno-unused-parameter" CACHE)
[2624]109ELSE()
[2868]110  REMOVE_COMPILER_FLAGS("-Wextra -Wno-unused-parameter" CACHE)
[2621]111  ADD_COMPILER_FLAGS("-Wall" CACHE)
[2624]112ENDIF()
[2621]113
[8351]114# Linker flags
115IF(LINUX)
116  # Don't allow undefined symbols in a shared library
117  SET_LINKER_FLAGS("-Wl,--no-undefined" CACHE)
118ENDIF()
[7429]119
[7458]120# Add compiler and linker flags for MinGW
[7429]121IF (MINGW)
[8368]122  ADD_COMPILER_FLAGS("-gstabs+" Debug RelForDevs RelWithDebInfo CACHE)
[7458]123
[7429]124  ADD_LINKER_FLAGS("-enable-auto-import" CACHE)
[7458]125ENDIF()
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