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<base href="http://bugs.llvm.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Improve diagnostic for hidden decls coming from non-modular headers"
href="http://bugs.llvm.org/show_bug.cgi?id=32670">32670</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Improve diagnostic for hidden decls coming from non-modular headers
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</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>Modules
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>bruno.cardoso@gmail.com
</td>
</tr>
<tr>
<th>CC</th>
<td>dgregor@apple.com, llvm-bugs@lists.llvm.org
</td>
</tr></table>
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<div>
<pre>Created <span class=""><a href="attachment.cgi?id=18290" name="attach_18290" title="testcase">attachment 18290</a> <a href="attachment.cgi?id=18290&action=edit" title="testcase">[details]</a></span>
testcase
The following code snippet leads to a very confusing error (also attached for
easy reproduction):
MessageTypes.h:
#ifndef ROOT_MessageTypes
#define ROOT_MessageTypes
enum EMessageTypes {
kROOTD_OPEN = 2004, //filename follows + mode
};
#endif
module.modulemap:
module "libNet.so" {
requires cplusplus
module "TMessage.h" { header "TMessage.h" export * }
module "TNetFile.h" { header "TNetFile.h" export * }
export *
}
Output:
TNetFile.cxx:1:10: remark: building module 'libNet.so' as
'/home/teemperor/Downloads/merge_enum/pcms/3MNDY7KURXTXS/libNet.so-141H35WZHCMDE.pcm'
[-Rmodule-build]
#include "TNetFile.h"
^
TNetFile.cxx:1:10: remark: finished building module 'libNet.so'
[-Rmodule-build]
TNetFile.cxx:2:10: error: declaration of 'kROOTD_OPEN' must be imported from
module 'libNet.so.TMessage.h' before it is required
auto v = kROOTD_OPEN;
^
In module 'libNet.so' imported from TNetFile.cxx:1:
./MessageTypes.h:5:4: note: previous declaration is here
kROOTD_OPEN = 2004, //filename follows + mode
^
1 error generated.
test.sh:
#!/bin/bash
CLANG="/opt/clang/inst/bin/clang"
rm -rf ./pcms/
# Normal clang invocation
#"$CLANG" -cc1 -triple x86_64-apple-macosx10.11.0 -fsyntax-only -I . -std=c++11
-x c++ TNetFile.cxx -nostdsysteminc
# Modules clang invocation
"$CLANG" -cc1 -triple x86_64-apple-macosx10.11.0 -fsyntax-only -I . -std=c++11
-fmodules -fimplicit-module-maps -fmodules-cache-path=./pcms/
-fcolor-diagnostics -fdiagnostics-show-option
-fdiagnostics-show-note-include-stack -x c++ TNetFile.cxx -nostdsysteminc
-Rmodule-build
TMessage.h:
#ifndef ROOT_TMessage
#define ROOT_TMessage
#include "MessageTypes.h"
#endif
TNetFile.cxx:
#include "TNetFile.h"
auto v = kROOTD_OPEN;
TNetFile.h:
#ifndef ROOT_TNetFile
#define ROOT_TNetFile
#include "MessageTypes.h"
#endif</pre>
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