ios - How do I xcodebuild a static library with Bitcode enabled? -

-

xcode 7 introduces bitcode, sort of llvm intermediate binary means apple's servers can recompile app different architectures without involvement.

at lookback, distribute static archive framework our library. seems when build "build & archive", bitcode not emitted library, , links library in app , tries build & archive bitcode enabled 1 of 2 warnings:

  • ld: 'lookback(lookback.o)' not contain bitcode. must rebuild bitcode enabled (xcode setting enable_bitcode), obtain updated library vendor, or disable bitcode target. (if lib built xcode 6)
  • ld: warning: full bitcode bundle not generated because 'lookback(lookback.o)' built bitcode marker. library must generated xcode archive build bitcode enabled (xcode setting enable_bitcode) (if lib built xcode 7 normal xcodebuild)

i have build script builds device+simulator universal binary, can't use build & archive, rather, run xcodebuild commandline script. how can make xcodebuild generate proper bitcode-enabled library?

bitcode compile-time feature (not link-time feature) means every .o file should contain section called __bitcode when built bitcode. can confirm whether binary bitcode-compatible running otool -l (my .o or .a file) | grep __llvm.

when build normally, xcode adds build flag -fembed-bitcode-marker clang invocation. seems sort of 'this bitcode go, if bitcode enabled' thing, , doesn't enable bitcode.

when "build & archive", flag replaced -fembed-bitcode, build bitcode-enabled binary.

there seems 2 ways make xcodebuild use -fembed-bitcode:

  • use 'archive' action, in xcodebuild -target lookbacksdk archive instead of xcodebuild -target lookbacksdk build. has side-effect of putting binaries in xcode organizer instead of build/ folder, though can work around using -exportarchive -archivepath ./build (thanks @jensayton)
  • force usage of flag adding other c flags other_cflags="-fembed-bitcode". xcodebuild invocation xcodebuild other_cflags="-fembed-bitcode" -target lookbacksdk build.

the latter chose don't have change build system, generate warnings every file, since both -fembed-bitcode-marker , -fembed-bitcode sent clang. luckilly latter wins, generating bitcode-enabled library!

resources


Comments

Post a Comment

Popular posts from this blog

qt - Using float or double for own QML classes -

-
i've created components , helper methods using c++ , qt used in qml gui. of methods calculate gui elements (size, transformations, scene graph items creation). target arm 32 bit using opengl / eglfs render output. opengl using float , qml using real (defined double ). what should use in c++ do not lose precision? if use qreal ( double ) shouldn't lose precision. if git grep float in qtbase.git , can find out bit more: dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0-* important behavior changes * dist/changes-5.2.0-**************************************************************************** dist/changes-5.2.0- dist/changes-5.2.0- - qt compiled qreal typedef'ed double on dist/changes-5.2.0: platforms. qreal float on arm chipsets before. guarantees more dist/changes-5.2.0- consistent behavior between platforms qt supports, binary dist/chan...
Read more

Create Outlook appointment via C# .Net -

-
i need create outlook appointment using microsoft.office.interop.outlook , while can work locally on own workstation , works if run web application via server's browser, not work when connect server externally. hence, think might permission issue. i changed application pool identity " localsystem " don't access denied error. unfortunately, doesn't work. the app behaves if appointment created, appointment doesn't appear in outlook. here include file on top of aspx.cs page using outlook = microsoft.office.interop.outlook; here code using pop appointment. outlook.application apptapp = new outlook.application(); outlook.appointmentitem appt = apptapp.createitem(outlook.olitemtype.olappointmentitem) outlook.appointmentitem; appt.subject = txtfirstname.text + " " + txtlastname.text; appt.body = txtcomment.text; appt.alldayevent = false; appt.start = datetime.parse(txtreminderdate.text + " 8:00 am"); appt.end = datetime.p...
Read more

ios - Swift Array Resetting Itself -

-
i have 2 arrays: pointhistory , datehistory . have nstimer , , when timer runs out, action called. in action appending int pointhistory , , current date string datehistory . here timer action: func timeraction() { let steppervalue = int(stepper.value) employee.numberofpoints = steppervalue networking.saveemployee(employee, completion: { (error) -> void in if error != nil { let alert = uialertcontroller(title: "error", message: "there error updating \(self.employee.name)'s points", preferredstyle: .alert) let alertaction = uialertaction(title: "ok", style: .cancel, handler: nil) alert.addaction(alertaction) self.presentviewcontroller(alert, animated: true, completion: nil) } }) var dateformatter = nsdateformatter() dateformatter.dateformat = "mm-dd-yyyy" dateformatter.timezone = nstimezone.localtimezone() var date = nsdate() var ...
Read more