https://bugs.llvm.org/show_bug.cgi?id=32226
Bug ID: 32226
Summary: Clang does not record command line options in objects
built
Product: clang
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: LLVM Codegen
Assignee: unassignedclangb...@nondot.org
Reporter: zhizh...@google.com
CC: llvm-bugs@lists.llvm.org
This bug is originally from chromium.
Link: https://bugs.chromium.org/p/chromium/issues/detail?id=669699
GCC records the command line options of how the object was built.
It takes -grecord-gcc-switches default as on, and record the options into
DW_AT_producer in DWARF as debug info.
While in clang, DW_AT_producer only records current version of the clang.
To reproduce:
Build a object with clang/gcc with option -g.
Then use "readelf --debug-dump=info" to check the object, search for
DW_AT_producer.
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