At link time, use the flag -fuse-linker-plugin to ensure that the library participates in the LTO optimization process: gcc -o myprog -O2 -flto -fuse-linker-plugin a.o b.o -lfoo

CMake v3.9 finally supports LTO. Here's an example code to show how it works: message(STATUS "IPO / LTO enabled") set_property(TARGET example PROPERTY INTERPROCEDURAL_OPTIMIZATION TRUE) message(STATUS "IPO / LTO not supported: <${error}>") For GCC this adds -flto -fno-fat-lto-objects to the targets compile commands.

2025年3月25日 · Link Time Optimization (LTO) is the term for a class of optimizations done during linking. The linker is aware of all the translation units (TUs) and can optimize more compared to what conventional optimization passes by a compiler individually can do. The most important optimizations done are inlining and code locality improvements.

2009年10月3日 · Link Time Optimization (LTO) gives GCC the capability of dumping its internal representation (GIMPLE) to disk, so that all the different compilation units that make up a single executable can be optimized as a single module.

flto是使用lto的主要方法，是一个优化选项，禁用lto使用-fno-lto。 flto主要做的操作有inline、ipa和alias分析等。 ThinLTO是一种可扩展和增量式的新型LTO，与LTO相比，表现甚至更好。 要使用ThinLTO，只需添加-flto=thin选项即可进行编译和链接。 第一阶段类似于传统LTO的步骤，在进行一些早期优化（主要是为了减小大小）之后，调用前端将每个输入源文件转换为包含IR的中间文件。 只是使用ThinLTO，每个文件中都包含一个附加的摘要部分。 ThinLTO overview如下： 2. …

2015年4月30日 · GCC's -flto emits a serialized form of GCC's internal representation, as you discovered. Then, at link time, the linker reinvokes GCC and passes it the objects that need final compilation. GCC reads the internal representation and does the work.

Link Time Optimization (LTO) gives GCC the capability of dumping its internal representation (GIMPLE) to disk, so that all the different compilation units that make up a single executable can be optimized as a single module.

2021年4月10日 · gcc在使用ar处理lto的文件时是需要使用gcc-ar来代替ar的，但为什么有些 编译器 仍使用ar也可以正确生成lib，那是因为在工具链的$libdir/bfd-plugins路径下包含liblto_plugin.so (liblto_plugin.dll)的动态库来提供给ar，使用插件功能，而有些编译器并没有从libexec路径内拷贝该 ...

2024年12月24日 · 建议使用LLVM19，perf 编译使用USE FLAG "libpfm", Enable dev-libs/libpfm support. 参考中的pref中-e 改为用 --pfm-event.

2016年3月11日 · The correct way to use Clang and enable LTO is using the -flto flag to the clang command line both at compile and link time. In addition, you will need to be working on a platform with a linker that either directly supports LTO (Apple's platforms generally) or that have an LLVM linker plugin (Linux using the Gold linker, but I think some have ...