forked from OSchip/llvm-project
e3576b0afa
Summary: When -gsplit-dwarf is used together with other -g options, in most cases the computed debug info level is decided by the last -g option, with one special case (see below). This patch drops that special case and thus makes it easy to reason about: // If a lower debug level -g comes after -gsplit-dwarf, in some cases // -gsplit-dwarf is cancelled. -gsplit-dwarf -g0 => 0 -gsplit-dwarf -gline-directives-only => DebugDirectivesOnly -gsplit-dwarf -gmlt -fsplit-dwarf-inlining => 1 -gsplit-dwarf -gmlt -fno-split-dwarf-inlining => 1 + split // If -gsplit-dwarf comes after -g options, with this patch, the net // effect is 2 + split for all combinations -g0 -gsplit-dwarf => 2 + split -gline-directives-only -gsplit-dwarf => 2 + split -gmlt -gsplit-dwarf -fsplit-dwarf-inlining => 2 + split -gmlt -gsplit-dwarf -fno-split-dwarf-inlining => 1 + split (before) 2 + split (after) The last case has been changed. In general, if the user intends to lower debug info level, place that -g option after -gsplit-dwarf. Some context: In gcc, the last of -gsplit-dwarf -g0 -g1 -g2 -g3 -ggdb[0-3] -gdwarf-* ... decides the debug info level (-gsplit-dwarf -gdwarf-* have level 2). It is a bit unfortunate that -gsplit-dwarf -gdwarf-* ... participate in the level computation but that is the status quo. Reviewers: dblaikie, echristo, probinson Reviewed By: dblaikie, probinson Subscribers: probinson, aprantl, jdoerfert, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D59923 llvm-svn: 358544 |
||
|---|---|---|
| .. | ||
| INPUTS | ||
| bindings | ||
| cmake | ||
| docs | ||
| examples | ||
| include | ||
| lib | ||
| runtime | ||
| test | ||
| tools | ||
| unittests | ||
| utils | ||
| www | ||
| .arcconfig | ||
| .clang-format | ||
| .clang-tidy | ||
| .gitignore | ||
| CMakeLists.txt | ||
| CODE_OWNERS.TXT | ||
| INSTALL.txt | ||
| LICENSE.TXT | ||
| ModuleInfo.txt | ||
| NOTES.txt | ||
| README.txt | ||
README.txt
//===----------------------------------------------------------------------===// // C Language Family Front-end //===----------------------------------------------------------------------===// Welcome to Clang. This is a compiler front-end for the C family of languages (C, C++, Objective-C, and Objective-C++) which is built as part of the LLVM compiler infrastructure project. Unlike many other compiler frontends, Clang is useful for a number of things beyond just compiling code: we intend for Clang to be host to a number of different source-level tools. One example of this is the Clang Static Analyzer. If you're interested in more (including how to build Clang) it is best to read the relevant web sites. Here are some pointers: Information on Clang: http://clang.llvm.org/ Building and using Clang: http://clang.llvm.org/get_started.html Clang Static Analyzer: http://clang-analyzer.llvm.org/ Information on the LLVM project: http://llvm.org/ If you have questions or comments about Clang, a great place to discuss them is on the Clang development mailing list: http://lists.llvm.org/mailman/listinfo/cfe-dev If you find a bug in Clang, please file it in the LLVM bug tracker: http://llvm.org/bugs/