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<base href="https://llvm.org/bugs/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW " title="NEW --- - clang fails to compile source with unicode literals under -std=gnu99" href="https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_bugs_show-5Fbug.cgi-3Fid-3D24188&d=AwMBaQ&c=8hUWFZcy2Z-Za5rBPlktOQ&r=pF93YEPyB-J_PERP4DUZOJDzFVX5ZQ57vQk33wu0vio&m=OGyFUwtwCPa8DhCQlCBiDa7JbDh18Izr8BlAZUZk0IM&s=LQWMyQGrrj6UlI7SYaJ768S3z0BZAcY5xoMqH2e8XGI&e=">24188</a>
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<th>Summary</th>
<td>clang fails to compile source with unicode literals under -std=gnu99
</td>
</tr>
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<th>Product</th>
<td>clang
</td>
</tr>
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<th>Version</th>
<td>3.4
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>normal
</td>
</tr>
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<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>-New Bugs
</td>
</tr>
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>jeansaad@ca.ibm.com
</td>
</tr>
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<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>clang fails to compile source with unicode literals under -std=gnu99.
gcc allows unicode literals under -std=gnu99 in support of TR 19769.
clang version used was 3.4; however it was tested as far back as 3.2 with same
behavior and possibly goes back a lot further.
### STANDALONE SOURCE:
#include <uchar.h>
int main(void) {
char16_t c16 = u'\u00F6';
char32_t c32 = U'\U0010FFFF';
}
### COMPILER INVOCATION:
clang -std=gnu99 -c unicode_literals.c
### EXPECTED OUTPUT:
Successful compile.
### ACTUAL OUTPUT:
unicode_literals.c:4:17: error: use of undeclared identifier 'u'
char16_t c16 = u'\u00F6';
^
unicode_literals.c:5:17: error: use of undeclared identifier 'U'
char32_t c32 = U'\U0010FFFF';
^
2 errors generated.
### clang -v OUTPUT:
Ubuntu clang version 3.4-1ubuntu3 (tags/RELEASE_34/final) (based on LLVM 3.4)
Target: x86_64-pc-linux-gnu
Thread model: posix
### GCC INVOCATION:
gcc -std=gnu99 -c unicode_literals.c
## gcc -v OUTPUT:
Thread model: posix
gcc version 4.8.4 (Ubuntu 4.8.4-2ubuntu1~14.04)</pre>
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