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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 - Clang fails to build with -DLLVM_ENABLE_MODULES=ON"
href="https://bugs.llvm.org/show_bug.cgi?id=37438">37438</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Clang fails to build with -DLLVM_ENABLE_MODULES=ON
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</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>Modules
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>anastasis.gramm2@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20299" name="attach_20299" title="clang build error">attachment 20299</a> <a href="attachment.cgi?id=20299&action=edit" title="clang build error">[details]</a></span>
clang build error
I am using system clang to compile the trunk clang.
$ clang --version # system clang
clang version 6.0.0 (tags/RELEASE_600/final)
Target: x86_64-pc-linux-gnu
Thread model: posix
I used the following cmake flags for the configuration:
$ cmake -GNinja -DCMAKE_BUILD_TYPE=Debug \
-DLLVM_ENABLE_MODULES=On -DCMAKE_C_COMPILER=clang \
-DCMAKE_CXX_COMPILER=clang++ ~/code/llvm
ninja opt worked fine and the build time was almost halfed.
ninja clang OTOH produces the attached errors. (short version below)
---
FAILED: tools/clang/lib/Basic/CMakeFiles/clangBasic.dir/Attributes.cpp.o
While building module 'Clang_Basic' imported from
/home/gramanas/code/llvm/tools/clang/lib/Basic/Attributes.cpp:1:
In file included from <module-includes>:15:
In file included from
/home/gramanas/code/llvm/tools/clang/include/clang/Basic/Attributes.h:13:
In file included from
/home/gramanas/code/llvm/tools/clang/include/clang/Basic/LangOptions.h:22:
/home/gramanas/code/llvm/tools/clang/include/clang/Basic/Visibility.h:53:3:
error: declaration of 'uint8_t' must be imported from module
'Clang_Basic.CommentOptions' before it is required
uint8_t linkage_ : 3;
^
/usr/include/bits/stdint-uintn.h:24:19: note: previous declaration is here
typedef __uint8_t uint8_t;
^
/home/gramanas/code/llvm/tools/clang/lib/Basic/Attributes.cpp:1:10: fatal
error: could not build module 'Clang_Basic'
#include "clang/Basic/Attributes.h"
~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
2 errors generated.
ninja: build stopped: subcommand failed.
---
I tried more configurations in the past weeks like with
ccache enabled and with shared libraries and everything
wroks just fine. It's only when I enable the modules
the it crashes.</pre>
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