http://llvm.org/bugs/show_bug.cgi?id=9281
Summary: Relocatable PCH support broken
Product: clang
Version: 2.8
Platform: PC
OS/Version: Windows NT
Status: NEW
Severity: normal
Priority: P
Component: -New Bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
Created an attachment (id=6198)
--> (http://llvm.org/bugs/attachment.cgi?id=6198)
Patch to clang.
I tried to create a relocatable PCH as part of a project built on top of clang
but there were some problems - The PCH would always contain absolute paths
instead of relative ones, so it would fail when we tried to use it later.
After some debugging, I noticed that the PCHGenerator constructor takes a
string pointer isysroot that is deleted before the PCHGenerator uses it (as a
pointer to a local variable is passed in), and thus a later comparison using it
fails. The Path::makeAbsolute() function in LLVM also fails to flip the back
slashes, which also breaks the same comparison.
The details are a bit sketchy as I worked on this a few weeks ago but didn't
get around to filing a bug until now. I have attached the patch that we made to
fix it for us though.
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