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[CMake] Mirror the additional NDEBUG define for non debug builds recently added

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by 03a8ef2795 . This relates to 

Also leave a note regarding ``compiler_flags_override.cmake`` its
value is a bit dubious now that the compiler flags are almost the CMake
defaults.
This commit is contained in:
Dan Liew 2016-03-09 11:28:43 +00:00
parent 236875c3ab
commit e12875ddb5
1 changed files with 14 additions and 8 deletions

22
contrib/cmake/cmake/compiler_flags_override.cmake
View file

@ -1,6 +1,6 @@
# This file overrides the default compiler flags for CMake's built-in
# configurations (CMAKE_BUILD_TYPE). Most compiler flags should not be set here.
# The main purpose is to make sure ``-DNDEBUG`` is never set by default.
# The main purpose is to have very fine grained control of the compiler flags.
if (CMAKE_C_COMPILER_ID)
set(_lang C)
elseif(CMAKE_CXX_COMPILER_ID)
@ -9,19 +9,25 @@ else()
message(FATAL_ERROR "Unknown language")
endif()
# TODO: The value of doing this is debatable. The flags set here are pretty
# much the CMake defaults now (they didn't use to be) and makes extra work for
# us when supporting different compilers. Perhaps we should move the remaining
# code that sets non-default flags out into the CMakeLists.txt files and remove
# any overrides here?
if (("${CMAKE_${_lang}_COMPILER_ID}" MATCHES "Clang") OR ("${CMAKE_${_lang}_COMPILER_ID}" MATCHES "GNU"))
# Taken from Modules/Compiler/GNU.cmake but -DNDEBUG is removed
# Taken from Modules/Compiler/GNU.cmake
set(CMAKE_${_lang}_FLAGS_INIT "")
set(CMAKE_${_lang}_FLAGS_DEBUG_INIT "-g -O0")
set(CMAKE_${_lang}_FLAGS_MINSIZEREL_INIT "-Os")
set(CMAKE_${_lang}_FLAGS_RELEASE_INIT "-O3")
set(CMAKE_${_lang}_FLAGS_RELWITHDEBINFO_INIT "-O2 -g")
set(CMAKE_${_lang}_FLAGS_MINSIZEREL_INIT "-Os -DNDEBUG")
set(CMAKE_${_lang}_FLAGS_RELEASE_INIT "-O3 -DNDEBUG")
set(CMAKE_${_lang}_FLAGS_RELWITHDEBINFO_INIT "-O2 -g -DNDEBUG")
# FIXME: Remove "x.." when CMP0054 is set to NEW
elseif ("x${CMAKE_${_lang}_COMPILER_ID}" STREQUAL "xMSVC")
# FIXME: Perhaps we should be using /MD instead?
set(CMAKE_${_lang}_FLAGS_DEBUG_INIT "/MTd /Zi /Ob0 /Od /RTC1")
set(CMAKE_${_lang}_FLAGS_MINSIZEREL_INIT "/MT /O1 /Ob1")
set(CMAKE_${_lang}_FLAGS_RELEASE_INIT "/MT /O2 /Ob2")
set(CMAKE_${_lang}_FLAGS_RELWITHDEBINFO_INIT "/MT /Zi /O2 /Ob1")
set(CMAKE_${_lang}_FLAGS_MINSIZEREL_INIT "/MT /O1 /Ob1 /D NDEBUG")
set(CMAKE_${_lang}_FLAGS_RELEASE_INIT "/MT /O2 /Ob2 /D NDEBUG")
set(CMAKE_${_lang}_FLAGS_RELWITHDEBINFO_INIT "/MT /Zi /O2 /Ob1 /D NDEBUG")
# Override linker flags (see Windows-MSVC.cmake for CMake's defaults)
# The stack size comes from the Python build system.
set(_msvc_stack_size "8388608")