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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Whitespace added during assembly"
href="https://bugs.llvm.org/show_bug.cgi?id=40689">40689</a>
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<th>Summary</th>
<td>Whitespace added during assembly
</td>
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<th>Product</th>
<td>clang
</td>
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<th>Version</th>
<td>unspecified
</td>
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<th>Hardware</th>
<td>All
</td>
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<th>OS</th>
<td>MacOS X
</td>
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<th>Status</th>
<td>NEW
</td>
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<th>Severity</th>
<td>enhancement
</td>
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<th>Priority</th>
<td>P
</td>
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<th>Component</th>
<td>-New Bugs
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<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
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<th>Reporter</th>
<td>adam@ahri.net
</td>
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<th>CC</th>
<td>htmldeveloper@gmail.com, llvm-bugs@lists.llvm.org, neeilans@live.com, richard-llvm@metafoo.co.uk
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<pre>Whitespace added during assembly breaks some files:
$ cat > bug
#!/bin/sh
#ifdef mingw32_HOST_OS
echo windows
#else
echo not windows
#endif
When assembled:
$ clang -E -x assembler-with-cpp bug
# 1 "bug"
# 1 "<built-in>" 1
# 1 "bug" 2
#!/bin/sh
echo not windows
Note the space added before the shebang.
More specifically, this breaks Haskell scripts that use clang to assemble files
which in turn employ the CPP extension; the leading space confuses the Haskell
compiler, stopping it from ignoring the shebang line and failing with a Haskell
compilation error.</pre>
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