ccache 3.2.2 发布，高速的 C/C++编译工具

5月23日 西安 OSC 源创会开始报名啦，存储、虚拟机、Docker 等干货分享

ccache 3.2.2 发布，此版本主要包括以下更新：

新特性及性能改善：

• Added support for CCACHE_COMPILERCHECK=string:<value>. This is a faster alternative to CCACHE_COMPILERCHECK=<command> if the command’s output can be precalculated by the build system.
  

• Add support for caching code coverage results (compiling for gcov).
  

Bug 修复：

• Fixed bug which could result in false cache hits when source code contains '"' followed by " /*" or " //" (with variations).
  

• Made hash of cached result created with and without CCACHE_CPP2 different. This makes it possible to rebuild with CCACHE_CPP2 set without having to clear the cache to get new results.
  

• Don’t try to reset a non-existing stats file. This avoids “No such file or directory” messages in the ccache log when the cache directory doesn’t exist.
  

• Fixed a bug where ccache deleted clang diagnostics after compiler failures.
  

• Avoid performing an unnecessary copy of the object file on a cache miss.
  

• Bail out on too hard compiler option -fmodules.
  

• Bail out on too hard compiler option -fplugin=libcc1plugin (interaction with GDB).
  

• Fixed build error when compiling ccache with recent clang versions.
  

• Removed signal-unsafe code from signal handler.
  

• Corrected logic for when to output cached stderr.
  

• Wipe the whole cached result on failure retrieving a cached file.
  

• Fixed build error when compiling ccache with recent clang versions.

详细信息请查看发行页面。

此版本现已提供下载：

https://github.com/jrosdahl/ccache/archive/v3.2.2.zip

ccache（“compiler cache”的缩写）是一个编译器缓存，该工具会高速缓存编译生成的信息，并在编译的特定部分使用高速缓存的信息， 比如头文件，这样就节省了通常使用 cpp 解析这些信息所需要的时间。如果您编译清单 2 中的文件，假定          foobar.h 中包含对其他头文件的引用，ccache 会用那个文件的 cpp-parsed 版本来 取代          include 声明。就那么简单。不是真正去读取、理解并解释其内容，ccache 只是 将最终的文本拷贝到文件中，使得它可以立即被编译。