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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Clang can't compile sys/std.h that comes with systemtap"
href="http://llvm.org/bugs/show_bug.cgi?id=17198">17198</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Clang can't compile sys/std.h that comes with systemtap
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.3
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>martin@martincmartin.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Clang's preprocessor fails on systemtap's sys/std.h.
The following code:
#include <sys/sdt.h>
int main() {
DTRACE_PROBE(a, b);
}
compiles with with G++, but when compiled with clang++ 3.3 gives the error
output below.
See also:
<a href="https://bugzilla.redhat.com/show_bug.cgi?id=999419">https://bugzilla.redhat.com/show_bug.cgi?id=999419</a>
<a href="https://sourceware.org/bugzilla/show_bug.cgi?id=13974">https://sourceware.org/bugzilla/show_bug.cgi?id=13974</a>
clang++ dtrace_probe.cpp
dtrace_probe.cpp:4:5: error: unknown flag
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:36:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BODY(provider, name, _SDT_ASM_ARGS, (n)) \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:43:31: note: expanded from macro '_SDT_ASM_3'
# define _SDT_ASM_3(a, b, c) _SDT_S(a) "," _SDT_S(b) "," \
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:9:2: note: expanded from here
".pushsection .note.stapsdt"
^
<inline asm>:2:31: note: instantiated into assembly here
.pushsection .note.stapsdt,"?","note"
^
dtrace_probe.cpp:4:5: error: .popsection without corresponding .pushsection
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:36:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BODY(provider, name, _SDT_ASM_ARGS, (n)) \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:41:26: note: expanded from macro '_SDT_ASM_1'
# define _SDT_ASM_1(x) _SDT_S(x) "\n"
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:29:2: note: expanded from here
".popsection"
^
<inline asm>:14:12: note: instantiated into assembly here
.popsection
^
dtrace_probe.cpp:4:5: error: expected '@' or '%' before type
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:38:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BASE); \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:45:36: note: expanded from macro '_SDT_ASM_5'
# define _SDT_ASM_5(a, b, c, d, e) _SDT_S(a) "," _SDT_S(b) "," \
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:32:2: note: expanded from here
".pushsection .stapsdt.base"
^
<inline asm>:2:33: note: instantiated into assembly here
.pushsection .stapsdt.base,"aG","progbits",.stapsdt.base,comdat
^
dtrace_probe.cpp:4:5: error: .popsection without corresponding .pushsection
DTRACE_PROBE(a, b);
^
/usr/include/sys/sdt.h:362:3: note: expanded from macro 'DTRACE_PROBE'
STAP_PROBE(provider,probe)
^
/usr/include/sys/sdt.h:254:3: note: expanded from macro 'STAP_PROBE'
_SDT_PROBE(provider, name, 0, ())
^
/usr/include/sys/sdt.h:38:27: note: expanded from macro '_SDT_PROBE'
__asm__ __volatile__ (_SDT_ASM_BASE); \
^
note: (skipping 1 expansions in backtrace; use
-fmacro-backtrace-limit=0 to see all)
/usr/include/sys/sdt.h:41:26: note: expanded from macro '_SDT_ASM_1'
# define _SDT_ASM_1(x) _SDT_S(x) "\n"
^
/usr/include/sys/sdt.h:40:22: note: expanded from macro '_SDT_S'
# define _SDT_S(x) #x
^
<scratch space>:42:2: note: expanded from here
".popsection"
^
<inline asm>:7:12: note: instantiated into assembly here
.popsection
^
4 errors generated.
$ clang++ --version
clang version 3.3 (tags/RELEASE_33/final)
Target: x86_64-unknown-linux-gnu
Thread model: posix</pre>
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