CMake与iOS工具链:无法找到主题 [英] CMake with iOS Toolchain: Can't Find Threads

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问题描述

我想使用 ios-cmake 来生成针对iOS的Xcode项目。但是,它找不到线程。下面是演示了一个简单的CMake脚本:

I'm trying to use ios-cmake to generate Xcode project targeting iOS. However, it cannot find Threads. Here's a simple CMake script for demonstration:

CMAKE_MINIMUM_REQUIRED (VERSION 2.8)
PROJECT (MyCITest)

SET (CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/modules")

########################
# EDIT: I've also tried adding the lines below prior to posting this question, 
# but there doesn't seem to be any effect.
# (http://stackoverflow.com/questions/8386897)

SET (CMAKE_REQUIRED_INCLUDES ${CMAKE_IOS_SDK_ROOT}/usr ${CMAKE_IOS_SDK_ROOT}/usr/include)
SET (CMAKE_CXX_FLAGS "--sysroot=${CMAKE_IOS_SDK_ROOT} ${CMAKE_CXX_FLAGS}")
SET (CMAKE_C_FLAGS "--sysroot=${CMAKE_IOS_SDK_ROOT} ${CMAKE_C_FLAGS}")

########################

FIND_PACKAGE (ZLIB REQUIRED)
FIND_PACKAGE (LibXml2 REQUIRED)
FIND_PACKAGE (Threads REQUIRED)

从终端运行CMake:

Running CMake from the terminal:

cmake .. -DCMAKE_TOOLCHAIN_FILE=../cmake/toolchains/iOS.cmake -GXcode

这是我得到的输出:

-- Toolchain using default iOS SDK: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk
-- Found ZLIB: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib/libz.dylib (found version "1.2.5") 
-- Found LibXml2: /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/lib/libxml2.dylib (found version "2.7.8") 
-- Looking for include file pthread.h
-- Looking for include file pthread.h - not found
CMake Error at cmake/modules/FindPackageHandleStandardArgs.cmake:97 (MESSAGE):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  cmake/modules/FindPackageHandleStandardArgs.cmake:288 (_FPHSA_FAILURE_MESSAGE)
  cmake/modules/FindThreads.cmake:166 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:8 (FIND_PACKAGE)


-- Configuring incomplete, errors occurred!



我已经三次检查pthread.h位于应用程序/ Xcode.app / Contents / Developer / Platforms / iPhoneOS.platform / Developer / SDKs / iPhoneOS6.0.sdk / usr / include ,此外,它位于ZLib和LibXML2没有问题,因此我不知道我做错了什么。

I've already triple-checked that pthread.h is located in /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS6.0.sdk/usr/include, and besides, it located ZLib and LibXML2 without a problem, so I'm not sure what I'm doing wrong.

> cmake --version
cmake version 2.8.10.2


推荐答案

事实证明,iOS工具链目前不支持 CheckIncludeFiles.cmake 使用的 TRY_COMPILE 这又由 FindThreads.cmake 使用。工具链目前设置为跳过 TRY_COMPILE

It turns out that the iOS toolchain currently doesn't support TRY_COMPILE, which is used by CheckIncludeFiles.cmake, which is in turn used by FindThreads.cmake. The toolchain is currently set to skip TRY_COMPILE by using:

set (CMAKE_CXX_COMPILER_WORKS TRUE)
set (CMAKE_C_COMPILER_WORKS TRUE)

参考: http://code.google.com/p/ios-cmake/issues/ detail?id = 1& can = 1

这篇关于CMake与iOS工具链:无法找到主题的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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