几乎赤裸的iOS8.4 ->如何获得链接器？

Question

编辑2015-29-10.实际上是-arch armv7而不是-arch arm64，在没有降低优化的情况下工作得很好。

编辑2015-29-10.I.我试图添加的

export CFLAGS="-O1"
export CXXFLAGS="-O1"

在configure之前，并且有相同的错误，这次丢失了一个不同的文件：

 "/usr/local/cctools-arm64-port/bin/ld" -demangle -dynamic -arch arm64 -iphoneos_version_min 5.0.0 -syslibroot /usr/local/iPhoneOS8.4.sdk -o testcpp /var/tmp/testcpp-4f79ac.o -lstdc++ -lSystem
ld: file not found: N?L

我也尝试了-O0优化，而不是-01，同样的结果。

编辑2015-28-10.二、--我做了这件事：

./autogen.sh
export CC="clang -arch arm64 -mios-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.4.sdk"
export CXX="clang++ -arch arm64 -mios-version-min=8.4 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS8.4.sdk"
./configure -v --host=arm-apple-darwin11 --prefix=/usr/local/lvm-cross/cctools-arm64-port
unset CC CXX
make && sudo make install

然后，我在iDevice上尝试了一个简单的hello世界，其中testcpp.cpp包含：

#include <iostream>
int main()
{
    std::cout << "oijo" << std::endl;
    return 0;
}

用

clang++ -v -isysroot /usr/local/iPhoneOS8.4.sdk -target arm64-apple-darwin11 testcpp.cpp -o testcpp

这给了我：

clang version 3.7.0 (tags/RELEASE_370/final)
Target: arm64-apple-darwin11
Thread model: posix
 "/usr/local/llvm-ios/bin/clang++" -cc1 -triple arm64-apple-ios5.0.0 -Wdeprecated-objc-isa-usage -Werror=deprecated-objc-isa-usage -Werror=implicit-function-declaration -emit-obj -mrelax-all -disable-free -disable-llvm-verifier -main-file-name testcpp.cpp -mrelocation-model pic -pic-level 2 -mthread-model posix -mdisable-fp-elim -masm-verbose -target-cpu generic -target-feature +neon -target-abi darwinpcs -target-linker-version 253.3.3 -v -dwarf-column-info -resource-dir /usr/local/llvm-ios/bin/../lib/clang/3.7.0 -isysroot /usr/local/iPhoneOS8.4.sdk -fdeprecated-macro -fdebug-compilation-dir /var/mobile/Documents/CODING/MY/TESTS_0/CPP -ferror-limit 19 -fmessage-length 108 -stack-protector 1 -mstackrealign -fallow-half-arguments-and-returns -fblocks -fobjc-runtime=ios-5.0.0 -fencode-extended-block-signature -fcxx-exceptions -fexceptions -fmax-type-align=16 -fdiagnostics-show-option -fcolor-diagnostics -o /var/tmp/testcpp-f1de66.o -x c++ testcpp.cpp
clang -cc1 version 3.7.0 based upon LLVM 3.7.0 default target arm-apple-darwin14.0.0
ignoring nonexistent directory "/usr/local/iPhoneOS8.4.sdk/usr/include/c++/4.2.1/arm64-apple-darwin10/"
ignoring nonexistent directory "/usr/local/iPhoneOS8.4.sdk/usr/local/include"
ignoring nonexistent directory "/usr/local/iPhoneOS8.4.sdk/Library/Frameworks"
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/iPhoneOS8.4.sdk/usr/include/c++/4.2.1
 /usr/local/iPhoneOS8.4.sdk/usr/include/c++/4.2.1/backward
 /usr/local/llvm-ios/bin/../lib/clang/3.7.0/include
 /usr/local/iPhoneOS8.4.sdk/usr/include
 /usr/local/iPhoneOS8.4.sdk/System/Library/Frameworks (framework directory)
End of search list.
 "/usr/local/cctools-arm64-port/bin/ld" -demangle -dynamic -arch arm64 -iphoneos_version_min 5.0.0 -syslibroot /usr/local/iPhoneOS8.4.sdk -o testcpp /var/tmp/testcpp-f1de66.o -lstdc++ -lSystem
ld: file not found: ?4
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

我也尝试了没有unset CC CXX，有同样的“成功”.

编辑2015-28-10.I.使用cydia解决方案的确实有效，但我确实想自己构建它，所以我遵循了https://github.com/tpoechtrager/cctools-port的方法。由于为mac os获取/构建libtool太无聊了，所以我切换到了一个虚拟盒ubuntu15.1064位，在这里我编写了以下包：automake、autogen、libtool、clang-3.7、uuid-dev和llvm-3.7-dev。然后我cd到了cctools目录，并做了如下操作：

./autogen.sh
export CC="clang-3.7 -arch arm64"
export CXX="clang++-3.7 -arch arm64"
./configure --prefix=/home/lvm-ubuntu/Desktop/iPad/cctools-produced/ --host=arm-apple-darwin11
make

(完整的输出在新的跟随要点。中) make生成以下警告和错误：

clang: warning: argument unused during compilation: '-arch arm64'

../include/foreign/libkern/arm/OSByteOrder.h:11:10: error: redefinition of
  '_OSSwapInt16'
uint16_t _OSSwapInt16(uint16_t data)
         ^
../include/foreign/libkern/i386/_OSByteOrder.h:46:1: note: previous definition
      is here
_OSSwapInt16(
^

_OSSwapInt32和_OSSwapInt64的模拟误差。我肯定做错了什么。

初始问题.

我成功地在一个越狱的iPad迷你3 wifi上为iOS8.4构建了iPad，这主要归功于以下两个问题：

https://stackoverflow.com/questions/32808144/how-to-cross-compile-clang-llvm-3-7-0-for-ios8-x-on-ipad-mini-3/

和

https://stackoverflow.com/questions/23946851/how-to-cross-compile-clang-llvm-for-ios/

设置所有路径等，并尝试使用clang++ -v testcpp.cpp -o testcpp，其中testcpp.cpp包含：

int main()
{
    return 0;
}

得到了这个：

clang++: error: unable to execute command: Executable "ld" doesn't exist!
clang++: error: linker command failed with exit code 1 (use -v to see invocation)

(整个详细的输出都在这个要旨中。)

显然，我没有GNU的ld，也没有任何真正的“重构”(通过llvm-clang)，所以我在问自己:在这种情况下，我的策略是什么？(没有链接器，我甚至不能尝试在我的iPad上构建iPad来使用它的ld)。

精确性:我希望在场景后面进行链接，这样我就可以继续执行clang++ -v testcpp.cpp -o testcpp，也就是说，我不希望自己在几个步骤中“手动”地进行链接。(但是一个脚本可以，即使我发现有一个真正的ld替换更优雅.)

备注:在llvm-clang bin文件夹中，我有以下内容：

XXXXs-iPad:/usr/local/llvm-ios/bin mobile$ ls -l
total 274412
-rwxr-xr-x 1 root wheel   205456 Oct 18 12:49 FileCheck*
-rwxr-xr-x 1 root wheel  7704096 Oct 18 12:48 bugpoint*
-rwxr-xr-x 1 root wheel   122036 Oct 18 12:48 c-index-test*
-rwxr-xr-x 1 root wheel 40802004 Oct 18 12:48 clang*
-rwxr-xr-x 1 root wheel 40802004 Oct 18 12:49 clang++*
-rwxr-xr-x 1 root wheel 31252792 Oct 18 12:49 clang-check*
-rwxr-xr-x 1 root wheel  1225352 Oct 18 12:49 clang-format*
-rwxr-xr-x 1 root wheel   671500 Oct 18 12:49 clang-tblgen*
-rwxr-xr-x 1 root wheel    49684 Oct 18 12:49 count*
-rwxr-xr-x 1 root wheel 22439396 Oct 18 12:49 llc*
-rwxr-xr-x 1 root wheel 10351388 Oct 18 12:49 lli*
-rwxr-xr-x 1 root wheel   208140 Oct 18 12:49 lli-child-target*
-rwxr-xr-x 1 root wheel  9144692 Oct 18 12:49 llvm-ar*
-rwxr-xr-x 1 root wheel  1619592 Oct 18 12:49 llvm-as*
-rwxr-xr-x 1 root wheel   155080 Oct 18 12:49 llvm-bcanalyzer*
-rwxr-xr-x 1 root wheel   120864 Oct 18 12:49 llvm-config*
-rwxr-xr-x 1 root wheel    92232 Oct 18 12:49 llvm-config-host*
-rwxr-xr-x 1 root wheel  1604600 Oct 18 12:49 llvm-cov*
-rwxr-xr-x 1 root wheel  1472656 Oct 18 12:49 llvm-cxxdump*
-rwxr-xr-x 1 root wheel  1471516 Oct 18 12:49 llvm-diff*
-rwxr-xr-x 1 root wheel  1225632 Oct 18 12:49 llvm-dis*
-rwxr-xr-x 1 root wheel 18342488 Oct 18 12:49 llvm-dsymutil*
-rwxr-xr-x 1 root wheel   419892 Oct 18 12:49 llvm-dwarfdump*
-rwxr-xr-x 1 root wheel  1686496 Oct 18 12:49 llvm-extract*
-rwxr-xr-x 1 root wheel  1800856 Oct 18 12:49 llvm-link*
-rwxr-xr-x 1 root wheel 10140692 Oct 18 12:49 llvm-mc*
-rwxr-xr-x 1 root wheel   138552 Oct 18 12:49 llvm-mcmarkup*
-rwxr-xr-x 1 root wheel  9144172 Oct 18 12:49 llvm-nm*
-rwxr-xr-x 1 root wheel 11554352 Oct 18 12:49 llvm-objdump*
-rwxr-xr-x 1 root wheel   220840 Oct 18 12:49 llvm-pdbdump*
-rwxr-xr-x 1 root wheel   469920 Oct 18 12:49 llvm-profdata*
-rwxr-xr-x 1 root wheel  9144692 Oct 18 12:49 llvm-ranlib*
-rwxr-xr-x 1 root wheel  1768528 Oct 18 12:49 llvm-readobj*
-rwxr-xr-x 1 root wheel  8388100 Oct 18 12:50 llvm-rtdyld*
-rwxr-xr-x 1 root wheel  1489124 Oct 18 12:50 llvm-size*
-rwxr-xr-x 1 root wheel  2106052 Oct 18 12:50 llvm-stress*
-rwxr-xr-x 1 root wheel  1610176 Oct 18 12:50 llvm-symbolizer*
-rwxr-xr-x 1 root wheel  1422732 Oct 18 12:50 llvm-tblgen*
-rwxr-xr-x 1 root wheel  1455516 Oct 18 12:50 macho-dump*
-rwxr-xr-x 1 root wheel    71184 Oct 18 12:50 not*
-rwxr-xr-x 1 root wheel  1620520 Oct 18 12:50 obj2yaml*
-rwxr-xr-x 1 root wheel 23007212 Oct 18 12:50 opt*
-rwxr-xr-x 1 root wheel  1768416 Oct 18 12:50 verify-uselistorder*
-rwxr-xr-x 1 root wheel   402360 Oct 18 12:50 yaml2obj*

Answer 1

通过Cydia安装org.coolstar.cctools和org.coolstar.ld64。

或者，或者手工构建https://github.com/tpoechtrager/cctools-port。

CXX="clang++ -arch arm64" CC="clang -arch arm64" ./configure --host=arm-apple-darwin11