[CMake] Removing compiler options

[J Decker]

    string( REPLACE "/EHsc" "" CMAKE_CXX_FLAGS_INIT ${CMAKE_CXX_FLAGS_INIT}
)
    string( REPLACE "/EHsc" "" CMAKE_C_FLAGS_INIT ${CMAKE_C_FLAGS_INIT} )
    string( REPLACE "/EHs" "" CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS_INIT} )
    string( REPLACE "/EHs" "" CMAKE_C_FLAGS_INIT ${CMAKE_C_FLAGS_INIT} )
    string( REPLACE "/RTC1" "" CMAKE_CXX_FLAGS_DEBUG
${CMAKE_CXX_FLAGS_DEBUG} )
    # cannot set CLR for C code anyway
    #string( REPLACE "/RTC1" "/CLR" CMAKE_C_FLAGS_DEBUG
${CMAKE_C_FLAGS_DEBUG} )


However; this ends up being a global sort of thing... would be nice to be
able to edit properties per target...

There's also a     <CLRSupport>true</CLRSupport>    flag in the project
file that it doesn't look like cmake supports emitting at all... it's the
setting that's in General Configuration Properties... doesn't look like
it's required to compile and link as MSIL... but maybe that's where the
setting to enable adding references is?  ... ya... clearing that removes
COM and .NET assemblies from the reference add page; just solution targets
are available...



On Tue, Dec 16, 2014 at 11:08 PM, Domen Vrankar <domen.vrankar at gmail.com>
wrote:
>
> This was asked a few years ago and I doubt that things have changed
> since then... http://www.cmake.org/pipermail/cmake/2010-May/036924.html
> (
> http://www.cmake.org/cmake/help/v2.8.10/cmake.html#prop_sf%3aCOMPILE_FLAGS
> ).
> An alternative would be to use
> http://www.cmake.org/cmake/help/v3.0/module/ExternalProject.html
>
> Regards,
> Domen
>
> 2014-12-17 4:49 GMT+01:00 Robert Dailey <rcdailey.lists at gmail.com>:
> > I still really need help with this. It's a blocker at this point for
> > me. Help is greatly appreciated; thanks in advance.
> >
> > On Sun, Nov 9, 2014 at 10:02 PM, Robert Dailey <rcdailey.lists at gmail.com>
> wrote:
> >> When setting up a CLR project through CMake, it becomes important to
> >> be able to *remove* compiler options at the project level. For
> >> example, the following need to be removed (MSVC12):
> >>
> >> /RTC1
> >> /EHsc
> >>
> >> There is no "remove_compile_options()" (which would be convenient).
> >> Any reason why this doesn't exist?
> >>
> >> Right now I'm trying to remove these via CMAKE_CXX_FLAGS locally but
> >> this doesn't work unless I forcefully change the cache. But this is a
> >> permanent operation that affects *all* projects, which I do not want.
> >> This is crazy, I'm hoping there is a better way. I'm using CMake 3.1
> >> RC1. Can anyone help me figure out how to remove compiler options on a
> >> per-project basis?
> >>
> >> Here is what I'm doing:
> >>
> >> function( add_clr_library target_name references )
> >>     set( source_files ${ARGN} )
> >>
> >>     set( default_references
> >>         System
> >>         System.Core
> >>         System.Data
> >>         System.Drawing
> >>         #System.Xml
> >>         #WindowsBase
> >>     )
> >>
> >>     if( CMAKE_CXX_FLAGS_DEBUG MATCHES "/RTC1" )
> >>         string( REGEX REPLACE "/RTC(su|[1su])" ""
> >> CMAKE_CXX_FLAGS_DEBUG "${CMAKE_CXX_FLAGS_DEBUG}" )
> >>     endif()
> >>
> >>     if( CMAKE_CXX_FLAGS MATCHES "/EHsc" )
> >>         string( REPLACE "/EHsc" "" CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS}"
> )
> >>     endif()
> >>
> >>     add_library( ${target_name} SHARED ${source_files} )
> >>
> >>     list( APPEND references ${default_references} )
> >>
> >>     set_target_properties( ${target_name} PROPERTIES
> >>         VS_DOTNET_REFERENCES "${references}"
> >>         VS_DOTNET_TARGET_FRAMEWORK_VERSION "v4.5"
> >>         COMPILE_FLAGS "/clr /EHa"
> >>         DEBUG_POSTFIX "d"
> >>     )
> >> endfunction()
> > --
> >
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