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<base href="https://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - libc++ fails to build with cmake on Leopard (works with buildit script)"
href="https://llvm.org/bugs/show_bug.cgi?id=25680">25680</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>libc++ fails to build with cmake on Leopard (works with buildit script)
</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>All
</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>cmake
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>jeremyhu@apple.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>libc++ builds on Leopard using the legacy buildit shell script, but it fails
when using cmake. Due to our inability to skip building libc++ with cmake
options (<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - cmake build system lacks a way to build libclang_rt without building libc++"
href="show_bug.cgi?id=25665">bug #25665</a>), this also impacts our ability to just build clang using
cmake.
The buildit script compiles algorithm.cpp successfully with:
/opt/local/bin/clang++-mp-3.7 -c -g -Os -arch x86_64 -arch i386 -nostdinc++
-std=c++11 -U__STRICT_ANSI__ -I../include ../src/algorithm.cpp
The cmake build fails with:
/opt/local/bin/clang++-mp-3.7 -D_DEBUG -D_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/build/projects/libcxx/lib
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/trunk/projects/libcxx/lib
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/build/include
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/trunk/include
-I/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/trunk/projects/libcxx/include
-pipe -Os -std=c++11 -arch x86_64 -arch i386 -fPIC
-fvisibility-inlines-hidden -arch x86_64 -arch i386 -UNDEBUG -std=c++11
-nostdinc++ -Wall -W -Wwrite-strings -Wno-unused-parameter -Wno-long-long
-Werror=return-type -Wno-error -fPIC -o
CMakeFiles/cxx.dir/__/src/algorithm.cpp.o -c
/opt/local/var/macports/build/_Users_jeremy_src_macports_dports_jeremyhu_lang_llvm-3.8/clang-3.8/work/trunk/projects/libcxx/src/algorithm.cpp
In file included from .../projects/libcxx/src/algorithm.cpp:11:
In file included from .../projects/libcxx/include/random:1638:
In file included from .../projects/libcxx/include/cmath:301:
.../projects/libcxx/include/math.h:1199:91: error: use of undeclared identifier
'llrintf'
inline _LIBCPP_INLINE_VISIBILITY long long llrint(float __lcpp_x) _NOEXCEPT
{return llrintf(__lcpp_x);}
^
---
Adding -U__STRICT_ANSI__ to the compilation line (like cmake does) results in a
successful compilation of algorithm.cpp.</pre>
</div>
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