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

[John Man <jman@home.org>]

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