Hi, I haven't installed XCode 4 yet, but the crt1.10.5.o is the c runtime file defining the symbol "start" which any program will be linked with being the programs real entry point. Disassembling "crt1.10.5.o" (for Leopard) and "crt1.10.6.o" (for Snow Leopard) reveals the very same code for the symbol "start", but "crt1.10.5.o" additionally defines "dyld_stub_binding_helper" and "__dyld_func_lookup". I think I read that XCode 4 is snow leopard+ only, therefore I guess "crt1.10.5.o" was deleted when you've install Xcode 4. Maybe a symbolic link "ln -s crt1.10.6.o crt1.10.5.o" in /usr/lib shall do just fine, but I will keep a copy of "crt1.10.5.o" before upgrading to Xcode 4 just in case and report any findings. - Steffen

fyi all: the relevant GHC ticket has already been done and the difference in how to build the ghc pkg has been identified. On Fri, Mar 11, 2011 at 11:39 AM, Carter Schonwald < carter.schonwald@gmail.com> wrote:

the latest xcode installer has no customization dialogues.

On Fri, Mar 11, 2011 at 9:46 AM, Mark Lentczner wrote:

...

I don't have Xcode4 (yet), but I'd be very surprised if Apple created an environment that cut off development for older releases.

In the past, the SDKs for some older releases have been an optional part of the install. That is, you've had to go to the customize installation screen and explicitly enable older SDKs. With the latest Xcodes, for example, the SDK for 10.3 was optional. I'm a little surprised that 10.5 would be put in that category... but it's possible.

Can someone with Xcode4 start the installer and go to the Customize screen and see if the SDK for 10.5 is an option there? (You can do this safely even if you've already installed... in fact, prior installers let you install a previously not-installed component at this point.)

- Mark

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well, the xcode 4 installer doesn't delete those files, it just moves them to developer-old On Sat, Mar 12, 2011 at 5:36 AM, steffen wrote:

There is no SDK for older Mac OS X Releases in XCode 4, but for iPhone... Not even in the Resources/Packages. Indeed Apple did remove support for older Systems then snow leopard in its new development tools. For that reason and problems with no support of IB Plugins one is encouraged not to delete XCode 3.

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