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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Including llvm/Support/SourceMgr.h kills PCH"
href="http://llvm.org/bugs/show_bug.cgi?id=22405">22405</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Including llvm/Support/SourceMgr.h kills PCH
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>3.6
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>Support Libraries
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>tim.besard@elis.ugent.be
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13774" name="attach_13774" title="Full compilation and error log (generating PCH + using it) using clang 3.5, compiling against LLVM 3.6 headers.">attachment 13774</a> <a href="attachment.cgi?id=13774&action=edit" title="Full compilation and error log (generating PCH + using it) using clang 3.5, compiling against LLVM 3.6 headers.">[details]</a></span>
Full compilation and error log (generating PCH + using it) using clang 3.5,
compiling against LLVM 3.6 headers.
If my to-be-precompiled header file (directly or indirectly) includes
"llvm/Support/SourceMgr.h", including the PCH when compiling other objects
generates an error:
llvm/Support/SourceMgr.h:48:10: error: call to deleted constructor of
'std::unique_ptr<MemoryBuffer>'
struct SrcBuffer {
^~~~~~~~~
(The rest of the error is snipped, I'll attach it in a log.)
How to reproduce:
-- headers.hpp ---------
#include <llvm/Support/SourceMgr.h>
------------------------
-- test.cpp ------------
#include "headers.hpp"
int main() {
return 0;
}
------------------------
Compiling with LLVM/clang 3.5.1, and using those headers, everything works as
expected:
------------------------
clang++ -I /usr/include -D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS \
-std=c++11 -x c++-header -o headers.hpp.pch headers.hpp
clang++ -std=c++11 -include headers.hpp -I /usr/include \
-D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -c -o test.o test.cpp
------------------------
(compilation flags generated with llvm-config).
However, if I use my locally-built LLVM 3.6 installation (still compiling with
clang 3.5, but it doesn't matter, I also tried with clang 3.6), it fails:
------------------------
clang++ -I ~/llvm-svn.release+assert/include -D__STDC_CONSTANT_MACROS \
-D__STDC_LIMIT_MACROS -std=c++11 -x c++-header \
-o headers.hpp.pch headers.hpp
clang++ -std=c++11 -include headers.hpp -I ~/llvm-svn.release+assert/include \
-D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -c -o test.o test.cpp
error: call to deleted constructor of 'std::unique_ptr<MemoryBuffer>'
------------------------
Not precompiling the header, compiling against the 3.6 headers works fine:
------------------------
clang++ -std=c++11 -I ~/llvm-svn.release+assert/include \
-D__STDC_CONSTANT_MACROS -D__STDC_LIMIT_MACROS -c -o test.o test.cpp
------------------------
Tested on LLVM 3.6, r227537. CXXFLAGS used in this report are shortened (I used
the bare minimum for readability's sake), but I also tested it with the full
set of flags generated by `llvm-config --cxxflags`.</pre>
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