Re: OS X Lion / Xcode 4.1 / problem compiling tarsnap

[James Montgomerie <jamie@th.ingsmadeoutofotherthin.gs>]

This sounds like a bug in the compiler. It would probably be worthwhile to file a bug report with Apple, if you have a developer account (http://bugreporter.apple.com).

Jamie.

On 24 Jul 2011, at 11:58, John Man wrote:

> I've also just found that it does compile fine (with -O2) using Xcode 4.1's /usr/bin/gcc-4.2:
> 
> "Using built-in specs.
> Target: i686-apple-darwin11
> Configured with: /private/var/tmp/gcc/gcc-5666.3~278/src/configure --disable-checking --enable-werror --prefix=/usr --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/include/c++/4.2.1
> Thread model: posix
> gcc version 4.2.1 (Apple Inc. build 5666) (dot 3)"
> 
> but not with Xcode 4.1's /usr/bin/gcc (which is actually /usr/bin/llvm-gcc-4.2):
> 
> "Using built-in specs.
> Target: i686-apple-darwin11
> Configured with: /private/var/tmp/llvmgcc42/llvmgcc42-2335.15~25/src/configure --disable-checking --enable-werror --prefix=/Developer/usr/llvm-gcc-4.2 --mandir=/share/man --enable-languages=c,objc,c++,obj-c++ --program-prefix=llvm- --program-transform-name=/^[cg][^.-]*$/s/$/-4.2/ --with-slibdir=/usr/lib --build=i686-apple-darwin11 --enable-llvm=/private/var/tmp/llvmgcc42/llvmgcc42-2335.15~25/dst-llvmCore/Developer/usr/local --program-prefix=i686-apple-darwin11- --host=x86_64-apple-darwin11 --target=i686-apple-darwin11 --with-gxx-include-dir=/usr/include/c++/4.2.1
> Thread model: posix
> gcc version 4.2.1 (Based on Apple Inc. build 5658) (LLVM build 2335.15.00)"
> 
> I don't know what was the position under the previous Xcode 4.0 (I can't go back to that) but I do note:
> 
> http://developer.apple.com/library/mac/#documentation/DeveloperTools/Conceptual/WhatsNewXcode/Articles/xcode_4-1.html
> 
> "The default compiler for iOS development in Xcode 4.1 is LLVM-GCC 4.2. Compared with the GCC compiler that was the default in Xcode 4.0, LLVM-GCC provides better code generation and optimization than GCC, while being exactly source compatible with GCC 4.2."
> 
>  - John, jman@home.org
> 

James Montgomerie
jamie@th.ingsmadeoutofotherthin.gs

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