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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - lib/tsan/go/buildgo.sh does not respect LDFLAGS when linking test binary"
href="https://llvm.org/bugs/show_bug.cgi?id=27597">27597</a>
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<th>Summary</th>
<td>lib/tsan/go/buildgo.sh does not respect LDFLAGS when linking test binary
</td>
</tr>
<tr>
<th>Product</th>
<td>compiler-rt
</td>
</tr>
<tr>
<th>Version</th>
<td>unspecified
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
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<th>OS</th>
<td>Linux
</td>
</tr>
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<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
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<th>Component</th>
<td>compiler-rt
</td>
</tr>
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<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>michael.hudson@canonical.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
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<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>buildgo.sh fails on Ubuntu 15.10 because the toolchain defaults to PIE there
currently:
(yakkety-amd64)root@aeglos:/root/trunk/lib/tsan/go# ./buildgo.sh
gcc gotsan.cc -c -o ./race_linux_amd64.syso -I../rtl -I../..
-I../../sanitizer_common -I../../../include -std=c++11 -m64 -Wall
-fno-exceptions -fno-rtti -DSANITIZER_GO
-DSANITIZER_DEADLOCK_DETECTOR_VERSION=2 -fPIC -ffreestanding
-Wno-maybe-uninitialized -Wno-unused-const-variable -Werror
-Wno-unknown-warning-option -DSANITIZER_DEBUG=0 -O3 -msse3 -fomit-frame-pointer
==27227==ERROR: ThreadSanitizer failed to allocate 0x4000 (16384) bytes at
address 1778c48e40000 (errno: 12)
Segmentation fault (core dumped)
Fixing this requires passing -no-pie to the link, but doing this properly is a
bit of a pain because support for the -no-pie flag is pretty new. It would be
easier for me to work around if linking the test executable respected the
LDFLAGS environment variable:
--- a/lib/tsan/go/buildgo.sh
+++ b/lib/tsan/go/buildgo.sh
@@ -121,7 +121,7 @@
fi
$CC $DIR/gotsan.cc -c -o $DIR/race_$SUFFIX.syso $FLAGS $CFLAGS
-$CC test.c $DIR/race_$SUFFIX.syso -m64 -o $DIR/test $OSLDFLAGS
+$CC test.c $DIR/race_$SUFFIX.syso -m64 -o $DIR/test $OSLDFLAGS $LDFLAGS
export GORACE="exitcode=0 atexit_sleep_ms=0"
if [ "$SILENT" != "1" ]; then
Would you consider such a change?</pre>
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