[CMake] CFlags being passed to Linker (OS X, ICC)

[Mike Jackson]

On Feb 1, 2008, at 5:06 PM, Bill Hoffman wrote:

> Mike Jackson wrote:
>> On Feb 1, 2008, at 4:46 PM, Bill Hoffman wrote:
>>> Mike Jackson wrote:
>>>>        On Feb 1, 2008, at 4:30 PM, Bill Hoffman wrote:
>>>>> Mike Jackson wrote:
>>>>>> I am trying to develop an icpc module file for Darwin and one  
>>>>>> of the problems that seems to be cropping up is that cmake is  
>>>>>> passing compiler flags to the linker. Specifically I have  
>>>>>> entered some values for CMAKE_CXX_FLAGS and the compile is  
>>>>>> fine but the linker gets all messed up:
>>>>>
>>>>> That is this stuff:
>>>>>
>>>>> SET(CMAKE_C_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
>>>>> SET(CMAKE_CXX_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS -w)
>>>>>
>> Just for giggles I used -Wd1170,981,383,424 instead of - 
>> wd1170,981,383,424 (note the capitalization difference). Beside  
>> ICC complaining that this was an unknown flag, the flag got passed  
>> unchanged to the linker, which the linker dealt with just fine.  
>> Just my observations.
>
> Mike, it has to be those variables.  That is the only way cmake  
> will remove a -w.   Note, Darwin.cmake will still be loaded even if  
> you have a Darwin-icpc.cmake.
>
>
> Put a message(${CMAKE_C_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS}) in  
> your project...
>
> -Bill


ALL MY FAULT.. I copied VERBATIM from the Darwin.cmake file which  
means that code set those cmake variables about half way down the  
file BACK to -w.

Here is my latest Darwin-icpc.cmake file

SET(CMAKE_C_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS "" CACHE STRING ""  
FORCE)
SET(CMAKE_CXX_CREATE_SHARED_LIBRARY_FORBIDDEN_FLAGS "" CACHE STRING  
"" FORCE)

# Setup for Leopard Compatibility
EXEC_PROGRAM(sw_vers ARGS -productVersion OUTPUT_VARIABLE _OSX_VERSION)
# MESSAGE (STATUS "_OSX_VERSION: ${_OSX_VERSION}")
IF ( _OSX_VERSION MATCHES "^10.4" )
   #IF(CMAKE_COMPILER_IS_GNUCC)
     SET (CMAKE_C_FLAGS_INIT "")
     SET (CMAKE_C_FLAGS_DEBUG_INIT "-gdwarf-2")
     SET (CMAKE_C_FLAGS_MINSIZEREL_INIT "-Os -DNDEBUG")
     SET (CMAKE_C_FLAGS_RELEASE_INIT "-O3 -DNDEBUG")
     SET (CMAKE_C_FLAGS_RELWITHDEBINFO_INIT "-O2 -gdwarf-2")
     SET (CMAKE_C_CREATE_PREPROCESSED_SOURCE "<CMAKE_C_COMPILER>  
<FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
     SET (CMAKE_C_CREATE_ASSEMBLY_SOURCE "<CMAKE_C_COMPILER> <FLAGS> - 
S <SOURCE> -o <ASSEMBLY_SOURCE>")
  # ENDIF(CMAKE_COMPILER_IS_GNUCC)

#  IF(CMAKE_COMPILER_IS_GNUCXX)
     SET (CMAKE_CXX_FLAGS_INIT "")
     SET (CMAKE_CXX_FLAGS_DEBUG_INIT "-gdwarf-2")
     SET (CMAKE_CXX_FLAGS_MINSIZEREL_INIT "-Os -DNDEBUG")
     SET (CMAKE_CXX_FLAGS_RELEASE_INIT "-O3 -DNDEBUG")
     SET (CMAKE_CXX_FLAGS_RELWITHDEBINFO_INIT "-O2 -gdwarf-2")
     SET (CMAKE_CXX_CREATE_PREPROCESSED_SOURCE "<CMAKE_CXX_COMPILER>  
<FLAGS> -E <SOURCE> > <PREPROCESSED_SOURCE>")
     SET (CMAKE_CXX_CREATE_ASSEMBLY_SOURCE "<CMAKE_CXX_COMPILER>  
<FLAGS> -S <SOURCE> -o <ASSEMBLY_SOURCE>")
#  ENDIF(CMAKE_COMPILER_IS_GNUCXX)
ENDIF ( _OSX_VERSION MATCHES "^10.4" )


SET(CMAKE_SHARED_LIBRARY_PREFIX "lib")
SET(CMAKE_SHARED_LIBRARY_SUFFIX ".dylib")
SET(CMAKE_SHARED_MODULE_PREFIX "lib")
SET(CMAKE_SHARED_MODULE_SUFFIX ".so")
SET(CMAKE_MODULE_EXISTS 1)
SET(CMAKE_DL_LIBS "")
SET(CMAKE_C_LINK_FLAGS "-headerpad_max_install_names")
SET(CMAKE_CXX_LINK_FLAGS "-headerpad_max_install_names")
SET(CMAKE_PLATFORM_HAS_INSTALLNAME 1)
SET(CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS "-dynamiclib - 
headerpad_max_install_names")
SET(CMAKE_SHARED_MODULE_CREATE_C_FLAGS "-bundle - 
headerpad_max_install_names")
SET(CMAKE_FIND_LIBRARY_SUFFIXES ".dylib" ".so" ".a")


# setup for universal binaries if sysroot exists
IF(EXISTS /Developer/SDKs/MacOSX10.4u.sdk)
   # set the sysroot to be used if CMAKE_OSX_ARCHITECTURES
   # has more than one value
   SET(CMAKE_OSX_SYSROOT /Developer/SDKs/MacOSX10.4u.sdk CACHE STRING
     "isysroot used for universal binary support")
   # set _CMAKE_OSX_MACHINE to umame -m
   EXEC_PROGRAM(uname ARGS -m OUTPUT_VARIABLE _CMAKE_OSX_MACHINE)

   # check for environment variable CMAKE_OSX_ARCHITECTURES
   # if it is set.
   IF(NOT "$ENV{CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
     SET(_CMAKE_OSX_MACHINE "$ENV{CMAKE_OSX_ARCHITECTURES}")
   ENDIF(NOT "$ENV{CMAKE_OSX_ARCHITECTURES}" STREQUAL "")
   # now put _CMAKE_OSX_MACHINE into the cache
   SET(CMAKE_OSX_ARCHITECTURES ${_CMAKE_OSX_MACHINE}
     CACHE STRING "Build architectures for OSX")
ENDIF(EXISTS /Developer/SDKs/MacOSX10.4u.sdk)


IF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")
   SET(CMAKE_SHARED_MODULE_CREATE_C_FLAGS
     "${CMAKE_SHARED_MODULE_CREATE_C_FLAGS} -flat_namespace - 
undefined suppress")
ENDIF("${CMAKE_BACKWARDS_COMPATIBILITY}" MATCHES "^1\\.[0-6]$")

IF(NOT XCODE)
   # Enable shared library versioning.  This flag is not actually  
referenced
   # but the fact that the setting exists will cause the generators  
to support
   # soname computation.
   SET(CMAKE_SHARED_LIBRARY_SONAME_C_FLAG "-install_name")
   SET(CMAKE_SHARED_LIBRARY_SONAME_CXX_FLAG "-install_name")
   SET(CMAKE_SHARED_LIBRARY_SONAME_Fortran_FLAG "-install_name")
ENDIF(NOT XCODE)

# Xcode does not support -isystem yet.
IF(XCODE)
   SET(CMAKE_INCLUDE_SYSTEM_FLAG_C)
   SET(CMAKE_INCLUDE_SYSTEM_FLAG_CXX)
ENDIF(XCODE)

SET(CMAKE_MacOSX_Content_COMPILE_OBJECT "\"${CMAKE_COMMAND}\" -E  
copy_if_different <SOURCE> <OBJECT>")

SET(CMAKE_C_CREATE_SHARED_LIBRARY
   "<CMAKE_C_COMPILER> <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_LIBRARY_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET> - 
install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS>  
<LINK_LIBRARIES>")
SET(CMAKE_CXX_CREATE_SHARED_LIBRARY
   "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET> - 
install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS>  
<LINK_LIBRARIES>")
SET(CMAKE_Fortran_CREATE_SHARED_LIBRARY
   "<CMAKE_Fortran_COMPILER> <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_LIBRARY_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET> - 
install_name <TARGET_INSTALLNAME_DIR><TARGET_SONAME> <OBJECTS>  
<LINK_LIBRARIES>")

SET(CMAKE_CXX_CREATE_SHARED_MODULE
       "<CMAKE_CXX_COMPILER> <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_MODULE_CREATE_CXX_FLAGS> <LINK_FLAGS> -o <TARGET>  
<OBJECTS> <LINK_LIBRARIES>")

SET(CMAKE_C_CREATE_SHARED_MODULE
       "<CMAKE_C_COMPILER>  <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_MODULE_CREATE_C_FLAGS> <LINK_FLAGS> -o <TARGET>  
<OBJECTS> <LINK_LIBRARIES>")

SET(CMAKE_Fortran_CREATE_SHARED_MODULE
       "<CMAKE_Fortran_COMPILER>  <LANGUAGE_COMPILE_FLAGS>  
<CMAKE_SHARED_MODULE_CREATE_Fortran_FLAGS> <LINK_FLAGS> -o <TARGET>  
<OBJECTS> <LINK_LIBRARIES>")


#  We can use $ENV{INTEL_LICENSE_FILE} to try and get at the  
installation location for ICC.
# We also need to consider to use cce (which is the 64bit compiler)  
and not JUST the 32bit compiler.
# I have no idea what the best way to do that would be.
#
SET(CMAKE_PLATFORM_IMPLICIT_INCLUDE_DIRECTORIES /usr/local/include / 
opt/intel/cc/10.1.007/include)
# default to searching for frameworks first
SET(CMAKE_FIND_FRAMEWORK FIRST)
# set up the default search directories for frameworks
SET(CMAKE_SYSTEM_FRAMEWORK_PATH
   ~/Library/Frameworks
   /Library/Frameworks
   /Network/Library/Frameworks
   /System/Library/Frameworks)

# default to searching for application bundles first
SET(CMAKE_FIND_APPBUNDLE FIRST)
# set up the default search directories for application bundles
SET(CMAKE_SYSTEM_APPBUNDLE_PATH
   ~/Applications
   /Applications
   /Developer/Applications)

INCLUDE(Platform/UnixPaths)
SET(CMAKE_SYSTEM_INCLUDE_PATH ${CMAKE_SYSTEM_INCLUDE_PATH} /sw/include)
SET(CMAKE_SYSTEM_LIBRARY_PATH ${CMAKE_SYSTEM_LIBRARY_PATH} /sw/lib)

Sorry for all the excess traffic.

-- 
Mike Jackson   Senior Research Engineer
Innovative Management & Technology Services