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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - flang preprocessor fails to parse simple macro alias"
href="https://bugs.llvm.org/show_bug.cgi?id=47818">47818</a>
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<th>Summary</th>
<td>flang preprocessor fails to parse simple macro alias
</td>
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<th>Product</th>
<td>flang
</td>
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<th>Version</th>
<td>trunk
</td>
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<th>Hardware</th>
<td>PC
</td>
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<th>OS</th>
<td>Linux
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>Frontend
</td>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
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<th>Reporter</th>
<td>tm@dev-zero.ch
</td>
</tr>
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<th>CC</th>
<td>David.Truby@arm.com, jperier@nvidia.com, kirankumartp@gmail.com, llvm-bugs@lists.llvm.org, sscalpone@nvidia.com
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<p>
<div>
<pre>Given the following code:
#define TO_VERSION2(MAJOR, MINOR) ((MAJOR) * 10000 + (MINOR) * 100)
#define TO_VERSION TO_VERSION2
#if TO_VERSION2(1, 11) <= TO_VERSION2(0, 0)
#endif
#if TO_VERSION(1, 11) <= TO_VERSION(0, 0)
#endif
I get with the latest trunk (llvmorg-12-init-8404-gacd0dd3a62d):
$ flang -E prog.F
/data/tiziano/flang/install/bin/f18: could not scan prog.F
prog.F:8:15: error: excess characters after expression
#if TO_VERSION(1, 11) <= TO_VERSION(0, 0)
^^^</pre>
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