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<base href="https://bugs.freedesktop.org/">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Git master fails to build with clang++/libc++ on Linux"
href="https://bugs.freedesktop.org/show_bug.cgi?id=98042">98042</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Git master fails to build with clang++/libc++ on Linux
</td>
</tr>
<tr>
<th>Product</th>
<td>Mesa
</td>
</tr>
<tr>
<th>Version</th>
<td>git
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Other
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>medium
</td>
</tr>
<tr>
<th>Component</th>
<td>Mesa core
</td>
</tr>
<tr>
<th>Assignee</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>krejzi@email.com
</td>
</tr>
<tr>
<th>QA Contact</th>
<td>mesa-dev@lists.freedesktop.org
</td>
</tr></table>
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<pre>When building on Linux using clang++ and its standard library, libc++, the
build fails with:
In file included from glsl/link_varyings.cpp:33:
In file included from ../../src/compiler/glsl/glsl_symbol_table.h:34:
In file included from ../../src/compiler/glsl/ir.h:33:
In file included from ../../src/compiler/glsl_types.h:29:
In file included from /usr/bin/../include/c++/v1/string.h:61:
/usr/include/string.h:518:12: error: exception specification in declaration
does not match previous declaration
virtual void visit(class ir_dereference_variable *) {}
^
extern int ffs (int __i) __THROW __attribute__ ((__const__));
^
../../src/util/bitscan.h:51:13: note: expanded from macro 'ffs'
#define ffs __builtin_ffs
^
../../src/util/bitscan.h:96:18: note: previous declaration is here
const int i = ffs(*mask) - 1;
^
../../src/util/bitscan.h:51:13: note: expanded from macro 'ffs'
#define ffs __builtin_ffs
^
../../src/compiler/glsl/ir_visitor.h:82:17: note: hidden overloaded virtual
function 'ir_control_flow_visitor::visit' declared here: type mismatch at 1st
parameter
('class ir_dereference_array *' vs 'ir_loop *')
In file included from glsl/link_varyings.cpp:33:
In file included from ../../src/compiler/glsl/glsl_symbol_table.h:34:
In file included from ../../src/compiler/glsl/ir.h:33:
In file included from ../../src/compiler/glsl_types.h:29:
In file included from /usr/bin/../include/c++/v1/string.h:61:
/usr/include/string.h:524:26: error: exception specification in declaration
does not match previous declaration
__extension__ extern int ffsll (long long int __ll)
^
../../src/util/bitscan.h:68:15: note: expanded from macro 'ffsll'
#define ffsll __builtin_ffsll
^
../../src/util/bitscan.h:104:18: note: previous declaration is here
const int i = ffsll(*mask) - 1;
^
../../src/util/bitscan.h:68:15: note: expanded from macro 'ffsll'
#define ffsll __builtin_ffsll
Build worked fine until recently. git bisect says the following:
ecd6fce2611e88ff8468a354cff8eda39f260a31 is the first bad commit
commit ecd6fce2611e88ff8468a354cff8eda39f260a31
Author: Rob Clark <<a href="mailto:robdclark@gmail.com">robdclark@gmail.com</a>>
Date: Wed Aug 31 17:44:01 2016 -0400
mesa/st: support lowering multi-planar YUV
Support multi-planar YUV for external EGLImage's (currently just in the
dma-buf import path) by lowering to multiple texture fetch's for each
plane and CSC in shader.
There was some discussion of alternative approaches for tracking the
additional UV or U/V planes:
<a href="https://lists.freedesktop.org/archives/mesa-dev/2016-September/127832.html">https://lists.freedesktop.org/archives/mesa-dev/2016-September/127832.html</a>
They all seemed worse than pipe_resource::next
Signed-off-by: Rob Clark <<a href="mailto:robdclark@gmail.com">robdclark@gmail.com</a>>
:040000 040000 80840dcad2d468df7741746515b03247c41a1084
88f03e54885c7b5b1090fb09709e7daf66972941 M src</pre>
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