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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 - for Microsoft compatibility, md5 hash on long mangled names"
href="https://bugs.llvm.org/show_bug.cgi?id=38868">38868</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>for Microsoft compatibility, md5 hash on long mangled names
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>6.0
</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>mib.bugzilla@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>For long mangled names, VS2017 (and earlier) create an md5 hash for some
external names. Since clang doesn't do this, there is an undefined symbol at
link time. Here is a test case.
In my experiment, clang created a External PROC named xxxfoo, but Microsoft
mangled it to
test.asm: call ??@f37d033b2f7c2800ae7be4d047d48121@
File test.h
#include <string>
#include <map>
#define FUN4096 xxfoo
#define FUN4095 xfoo
#define FUN4097 xxxfoo
class yxxxxxxxxxxxxxxxxxxxxField {};
typedef std::map<std::string, yxxxxxxxxxxxxxxxxxxxxField>
yxxxxxxxxxxxxxxxScreen
;
typedef std::map<std::string, yxxxxxxxxxxxxxxxScreen> yxxxxxxxxxxxxxxxWebApp;
typedef std::map<std::string, yxxxxxxxxxxxxxxxWebApp> yxxxxxxxxxxxxxxxw2;
typedef std::map<std::string, yxxxxxxxxxxxxxxxw2> mymap;
//typedef std::map<std::string, WebApp2> WebAppTest;
//typedef std::map<std::string, WebAppTest> mymap;
extern void FUN4096(mymap);
extern void FUN4095(mymap);
extern void FUN4097(mymap);
File test.cpp
#include "test.h"
#include <stdio.h>
mymap obj;
int main() {
FUN4096(obj);
FUN4095(obj);
FUN4097(obj);
printf("PASSED\n");
return 0;
}
File testa.cpp
#include "test.h"
void FUN4096( mymap obj)
{
obj.clear();
}
void FUN4095( mymap obj)
{
obj.clear();
}
void FUN4097( mymap obj)
{
obj.clear();
}</pre>
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