http://llvm.org/bugs/show_bug.cgi?id=16837
Bug ID: 16837
Summary: Debug mode status page doesn't contain how to enable
debug mode
Product: libc++
Version: 3.2
Hardware: All
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: All Bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
The debug mode status page doesn't contain how to enable debug mode... !
http://libcxx.llvm.org/debug_mode.html
The page should at least be extended with:
"To enable libc++'s debug mode, define the macro XXXXXXX.".
Extra info:
Howard wrote in September 2011 (see
http://lists.cs.uiuc.edu/pipermail/cfe-dev/2011-September/017177.html ):
"I've checked in an experimental implementation of this.
-D_LIBCPP_DEBUG2
gets you the "standard" debugging mode, which includes checking for iterator
invalidation.
-D_LIBCPP_DEBUG2=0
gets you "debug lite". This only checks things that are really cheap such as
those you mention.
I've left the door open for:
-D_LIBCPP_DEBUG2=2
which would make even more expensive checks (e.g. check the invariants of a
red/black tree)."
I don't know if this is still up to date. Furthermore, Google tells me that:
- the macro _LIBCPP_DEBUG is used for the old debug mode (deprecated? does it
still work?)
- the macro _LIBCPP_DEBUG2 is used for the new debug mode (the one documented
in the page?)
Maybe these two should also be documented on the page.
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