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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 - support for GCC complex data types extension is always enabled."
href="https://bugs.llvm.org/show_bug.cgi?id=37298">37298</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>support for GCC complex data types extension is always enabled.
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</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>C++
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>konstantin.belochapka@sony.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20251" name="attach_20251" title="reprodicible">attachment 20251</a> <a href="attachment.cgi?id=20251&action=edit" title="reprodicible">[details]</a></span>
reprodicible
clang with -std=c++11 option does not disable support for GCC complex data
types extensions.
-------------------------------------------------------------------------------
Compile the attached source with -std=c++14:
$clang -c -std=c++11 gcc-complex-data-extension.cpp
This produces no warnings or errors.
--------------------------------------------------------------------------------
GCC with -std=c++14 option produces the following error messages:
$gcc -c -std=c++14 gcc-complex-data-extension.cpp
gcc-complex-data-extension.cpp: In function 'int test()':
gcc-complex-data-extension.cpp:25:20: error: unable to find numeric literal
operator 'operator""i'
cshort_t cs = 2 + 2i;
^
.....
gcc-complex-data-extension.cpp:31:24: note: use -std=gnu++11 or
-fext-numeric-literals to enable
more built-in suffixes
gcc-complex-data-extension.cpp:32:26: error: unable to find numeric literal
operator 'operator""fi'
cldouble_t cld = 8.0f + 2.1fi;
^
gcc-complex-data-extension.cpp:32:26: note: use -std=gnu++11 or
-fext-numeric-literals to enable
more built-in suffixes
--------------------------------------------------------------------------------
After adding -pedantic, we can observe the following list of warnings:
$clang -c -std=c++11 -pedantic gcc-complex-data-extension.cpp
Produces the following:
gcc-complex-data-extension.cpp:25:20: warning: imaginary constants are a GNU
extension
[-Wgnu-imaginary-constant]
cshort_t cs = 2 + 2i;
^
...... ^
gcc-complex-data-extension.cpp:32:26: warning: imaginary constants are a GNU
extension
[-Wgnu-imaginary-constant]
cldouble_t cld = 8.0f + 2.1fi;
$clang -c -std=gnu++11 -pedantic gcc-complex-data-extension.cpp
Produces identical list of warnings.
Conclusion:
Unlike GCC, clang when used with -std=c++11 option, does not disable GCC
complex data types extension support.</pre>
</div>
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