source: code/branches/buildsystem2/cmake/BuildConfigGCC.cmake @ 2621

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 #   License notice:
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 #   This program is free software; you can redistribute it and/or
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 #   of the License, or (at your option) any later version.
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 #   This program is distributed in the hope that it will be useful,
 #   but WITHOUT ANY WARRANTY; without even the implied warranty of
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 #   Author:
 #      Reto Grieder
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 #      ...
 #

# Also include environment flags. Could cause conflicts though
SET_COMPILER_FLAGS("$ENV{CXXFLAGS}" CXX CACHE)
SET_COMPILER_FLAGS("$ENV{CFLAGS}"   C   CACHE)

# These flags get added to the flags above
SET_COMPILER_FLAGS("    -g -ggdb -D_DEBUG" Debug          CACHE)
SET_COMPILER_FLAGS("             -DNDEBUG" ReleaseAll     CACHE)
ADD_COMPILER_FLAGS("-O3"                   Release        CACHE)
ADD_COMPILER_FLAGS("-O2 -g -ggdb"          RelWithDebInfo CACHE)
ADD_COMPILER_FLAGS("-Os"                   MinSizeRel     CACHE)

# CMake doesn't seem to set the PIC flags right on certain 64 bit systems
IF(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64")
  ADD_COMPILER_FLAGS("-fPIC" CACHE)
ENDIF(${CMAKE_SYSTEM_PROCESSOR} STREQUAL "x86_64")

# Increase warning level if requested
IF(EXTRA_WARNINGS)
  REMOVE_COMPILER_FLAGS("-Wall" CACHE)
  ADD_COMPILER_FLAGS("-Wextra --Wno-unused-parameter" CACHE)
ELSE(EXTRA_WARNINGS)
  REMOVE_COMPILER_FLAGS("-Wextra --Wno-unused-parameter" CACHE)
  ADD_COMPILER_FLAGS("-Wall" CACHE)
ENDIF(EXTRA_WARNINGS) 

# General linker flags
SET_LINKER_FLAGS("--no-undefined" CACHE)