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<base href="https://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Compiler build failure after https://reviews.llvm.org/D51693"
href="https://bugs.llvm.org/show_bug.cgi?id=38885">38885</a>
</td>
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<th>Summary</th>
<td>Compiler build failure after https://reviews.llvm.org/D51693
</td>
</tr>
<tr>
<th>Product</th>
<td>new-bugs
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>new bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>abhilash_bhandari@yahoo.co.in
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>LLVM fails to build
With the configure script:
cmake -G"Unix Makefiles" -DLLVM_BUILD_LLVM_DYLIB:STRING=ON
-DLLVM_LINK_LLVM_DYLIB=ON -DLLVM_ENABLE_LIBEDIT=OFF
-DCMAKE_BUILD_TYPE:STRING=RELEASE -DCLANG_DEFAULT_LINKER:STRING=lld
-DLLVM_BUILD_EXTERNAL_COMPILER_RT=ON -DLLVM_TARGETS_TO_BUILD:STRING=X86
-DLLVM_ENABLE_ASSERTIONS:BOOL=ON -DCLANG_REPOSITORY_STRING=CLANG:
-DLLVM_ENABLE_WERROR=ON -DCMAKE_CXX_FLAGS=\'-Wno-error=pedantic\' \llvm
The error is:
In file included from
llvm/lib/Support/APInt.cpp:22:0:
llvm/include/llvm/ADT/bit.h: In instantiation of ‘To llvm::bit_cast(const
From&) [with To = long unsigned int; From = double; <template-parameter-1-3> =
void; <template-parameter-1-4> = void; <template-parameter-1-5> = void]’:
llvm/lib/Support/APInt.cpp:716:41: required from here
llvm/include/llvm/ADT/bit.h:29:40: error: dereferencing type-punned pointer
will break strict-aliasing rules [-Werror=strict-aliasing]
return reinterpret_cast<To &>(storage);
^
llvm/include/llvm/ADT/bit.h: In instantiation of ‘To llvm::bit_cast(const
From&) [with To = double; From = long unsigned int; <template-parameter-1-3> =
void; <template-parameter-1-4> = void; <template-parameter-1-5> = void]’:
llvm/lib/Support/APInt.cpp:807:28: required from here
llvm/include/llvm/ADT/bit.h:29:40: error: dereferencing type-punned pointer
will break strict-aliasing rules [-Werror=strict-aliasing]
System Compiler: GCC 5.4.0</pre>
</div>
</p>
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