我在计算机上安装了Xcode 4.5和iOS6.0 SDK，MacOSX 10.7 SDK，命令行工具。我从http://curl.haxx.se/download/curl-7.27.0.tar.gz下载libcurl并使用arch armv7s为iOS编译。
我确实遵循了：
export CC="/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7s"export LDFLAG =“ - isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk --Wl，-syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk“
export CFLAG =“ - isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk“
./ configure --host = arm-apple-darwin10
并在下面收到错误：
$ ./configure --host=arm-apple-darwin10
configure: WARNING: If you wanted to set the --build type, don't use --host.
If a cross compiler is detected then cross compile mode will be used.
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether to enable debug build options... no
checking whether to enable compiler optimizer... (assumed) yes
checking whether to enable strict compiler warnings... no
checking whether to enable compiler warnings as errors... no
checking whether to enable curl debug memory tracking... no
checking whether to enable hiding of library internal symbols... yes
checking whether to enable c-ares for DNS lookups... no
checking for sed... /usr/bin/sed
checking for grep... /usr/bin/grep
checking for egrep... /usr/bin/grep -E
checking for arm-apple-darwin10-ar... no
checking for ar... /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin/ar
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for gawk... no
checking for mawk... no
checking for nawk... no
checking for awk... awk
checking whether make sets $(MAKE)... yes
checking for arm-apple-darwin10-strip... no
checking for strip... strip
checking curl version... 7.27.0
checking build system type... i386-apple-darwin12.2.0
checking host system type... arm-apple-darwin10
checking for style of include used by make... GNU
checking for arm-apple-darwin10-gcc... /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang -arch armv7s
checking for C compiler default output file name...
configure: error: in `/Users/eric/working/curl-7.27.0':
configure: error: C compiler cannot create executables
See `config.log' for more details.
有谁知道怎么做？