MantisBT - CMake
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IDProjectCategoryView StatusDate SubmittedLast Update
0014733CMakeCMakepublic2014-02-04 09:542016-06-10 14:31
Reportervalentin 
Assigned ToKitware Robot 
PrioritynormalSeverityfeatureReproducibilityalways
StatusclosedResolutionmoved 
PlatformAppleOSOSXOS Version10.6
Product VersionCMake 2.8.10.2 
Target VersionFixed in Version 
Summary0014733: [OSX] Specify arch-specific flags with multiple CMAKE_OSX_ARCHITECTURES
DescriptionHi all !

First of all, I apologize for my bad english ;)
I'm trying to use LuaJIT (built as a fat-binaries) on OSX with my application. The problem is that the doc says I have to add some flags ("-pagezero_size 10000 -image_base 100000000") with a 64bit build to not get a segfault, and on the other hand, it won't compile with the 32bit one ("ld: section __mach_header would make the output executable exceed available address range for architecture i386")

Since I'm configuring the "fat-build" with the CMAKE_OSX_ARCHITECTURES="i386;x86_64" option, can you consider to add an option to specify a flag with the x86_64 build only, and not use it with the i386 ?

Thanks you for reading :)
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Issue History
Date ModifiedUsernameFieldChange
2014-02-04 09:54valentinNew Issue
2014-02-04 10:36Brad KingNote Added: 0035036
2014-02-04 10:36Brad KingSeverityminor => feature
2014-02-04 10:36Brad KingStatusnew => backlog
2014-02-04 10:36Brad KingSummary[OSX] Specify 64bit-specific flag with CMAKE_OSX_ARCHITECTURES => [OSX] Specify arch-specific flags with multiple CMAKE_OSX_ARCHITECTURES
2014-02-04 11:04Brad KingNote Added: 0035037
2016-06-10 14:29Kitware RobotNote Added: 0042476
2016-06-10 14:29Kitware RobotStatusbacklog => resolved
2016-06-10 14:29Kitware RobotResolutionopen => moved
2016-06-10 14:29Kitware RobotAssigned To => Kitware Robot
2016-06-10 14:31Kitware RobotStatusresolved => closed

Notes
(0035036)
Brad King   
2014-02-04 10:36   
Interesting use case. I do not think we have any way to specify arch-specific flags. CMAKE_OSX_ARCHITECTURES is special to support OS X universal binaries so we don't have a first-class notion of multiple architectures in a single build tree.
(0035037)
Brad King   
2014-02-04 11:04   
For the Makefile and Ninja generators we generate only one compile line and specify multiple "-arch" flags so it is not possible to specify separate flags for that case without significant refactoring of the generators.

For the Xcode generator there is already a feature you can use to get these flags for a target. See the target property XCODE_ATTRIBUTE_<an-attribute>:

 http://www.cmake.org/cmake/help/v2.8.12/cmake.html#prop_tgt:XCODE_ATTRIBUTE_an-attribute [^]

For example:

 set_property(TARGET myexe PROPERTY
   "XCODE_ATTRIBUTE_OTHER_CFLAGS[arch=x86_64]" "-pagezero_size 10000 -image_base 100000000"
   )

This isn't a first-class feature but at least you could use it to build.
(0042476)
Kitware Robot   
2016-06-10 14:29   
Resolving issue as `moved`.

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