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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 --- - '-stdlib=libc++' unused during compilation"
href="http://llvm.org/bugs/show_bug.cgi?id=19120">19120</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>'-stdlib=libc++' unused during compilation
</td>
</tr>
<tr>
<th>Product</th>
<td>Build scripts
</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>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>cmake
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>oroppas@gmail.com
</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>LLVM_ENABLE_LIBCXX:BOOL=ON appends '-stdlib=libc++' to CMAKE_CXX_FLAGS,
CMAKE_EXE_LINKER_FLAGS, CMAKE_SHARED_LINKER_FLAGS, and
CMAKE_MODULE_LINKER_FLAGS, however, the flag conflict with '-nostdinc++' used
during the build process of libcxx:
/usr/bin/clang++ -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS
-D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -Dcxx_EXPORTS -march=native
-mtune=native -flto -pipe -fstack-protector --param=ssp-buffer-size=4
-stdlib=libc++ -fPIC -fvisibility-inlines-hidden -Wall -W -Wno-unused-parameter
-Wwrite-strings -Wmissing-field-initializers -pedantic -Wno-long-long
-Wcovered-switch-default -Wnon-virtual-dtor -std=c++11 -fcolor-diagnostics
-ffunction-sections -fdata-sections -nostdinc++ -Werror=return-type -Wall -W
-Wno-unused-parameter -Wwrite-strings -Wno-long-long -Wno-error -pedantic -O3
-DNDEBUG -fPIC -Iprojects/libcxx/lib
-I/home/ryuta/devel/llvm/src/llvm/projects/libcxx/lib -Iinclude
-I/home/ryuta/devel/llvm/src/llvm/include
-I/home/ryuta/devel/llvm/src/llvm/projects/libcxx/include -Werror -fPIC -MMD
-MT projects/libcxx/lib/CMakeFiles/cxx.dir/__/src/utility.cpp.o -MF
"projects/libcxx/lib/CMakeFiles/cxx.dir/__/src/utility.cpp.o.d" -o
projects/libcxx/lib/CMakeFiles/cxx.dir/__/src/utility.cpp.o -c
/home/ryuta/devel/llvm/src/llvm/projects/libcxx/src/utility.cpp
clang-3.5: warning: argument unused during compilation: '-stdlib=libc++'
We can either set '-stdlib=libc++' a bit more carefully on llvm/cmake side or
remove this particular flag later on libcxx/cmake side.</pre>
</div>
</p>
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