我知道以前有人问过这个问题，并且我尝试了很多东西，但我无法让它发挥作用。
rvm install 1.9.3 --with-gcc=clang
或者
rvm pkg install libyaml
给出：
Fetching yaml-0.1.4.tar.gz to /Users/usr/.rvm/archives
Extracting yaml-0.1.4.tar.gz to /Users/usr/.rvm/src
Error running 'tar xmzf /Users/usr/.rvm/archives/yaml-0.1.4.tar.gz -C /Users/usr/.rvm/src ', please read /Users/usr/.rvm/log/yaml/extract.log
Configuring yaml in /Users/usr/.rvm/src/yaml-0.1.4.
Error running ' ./configure --prefix="/Users/usr/.rvm/usr" ', please read /Users/usr/.rvm/log/yaml/configure.log
Compiling yaml in /Users/usr/.rvm/src/yaml-0.1.4.
Error running 'make ', please read /Users/usr/.rvm/log/yaml/make.log
三个日志文件是：
提取日志：
[2012-04-22 18:41:07] tar xmzf /Users/usr/.rvm/archives/yaml-0.1.4.tar.gz -C /Users/usr/.rvm/src
yaml-0.1.4/tests/example-reformatter-alt.c: Can't unlink already-existing object
yaml-0.1.4/tests/example-deconstructor.c: Can't unlink already-existing object
…
100 rows like this
…
yaml-0.1.4/win32/config.h: Can't unlink already-existing object
tar: Error exit delayed from previous errors.
配置日志：
[2012-04-22 20:12:18] ./configure --prefix="/Users/usr/.rvm/usr" --with-gcc=clang
configure: WARNING: unrecognized options: --with-gcc
./configure: line 2215: confdefs.h: Permission denied
./configure: line 2219: confdefs.h: Permission denied
./configure: line 2223: confdefs.h: Permission denied
./configure: line 2227: confdefs.h: Permission denied
./configure: line 2231: confdefs.h: Permission denied
./configure: line 2235: confdefs.h: Permission denied
./configure: line 2239: confdefs.h: Permission denied
checking for a BSD-compatible install... ./configure: line 2443: conftest.one: Permission denied
./configure: line 2444: conftest.two: Permission denied
mkdir: conftest.dir: Permission denied
usage: install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]
[-o owner] file1 file2
install [-bCcpSsv] [-B suffix] [-f flags] [-g group] [-m mode]
[-o owner] file1 ... fileN directory
install -d [-v] [-g group] [-m mode] [-o owner] directory ...
config/install-sh -c
checking whether build environment is sane... ./configure: line 2492: conftest.file Permission denied
configure: error: ls -t appears to fail. Make sure there is not a broken
alias in your environment
configure: error: newly created file is older than distributed files!
Check your system clock
制作日志：
[2012-04-22 20:44:29] make
make: *** No targets specified and no makefile found. Stop.
ruby -v 给出 *未更新，如您所见：
ruby 1.8.7 (2010-01-10 patchlevel 249) [universal-darwin11.0]
gcc -v 给出：
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)
xcodebuild -version 给出：
Xcode 4.3.2
Build version 4E2002
关于如何解决这个问题的任何想法？几年前很难启动并运行轨道..