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<body><span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span> changed
<a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - missing error on reference to undefined weak symbol"
href="https://bugs.llvm.org/show_bug.cgi?id=34058">bug 34058</a>
<br>
<table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>What</th>
<th>Removed</th>
<th>Added</th>
</tr>
<tr>
<td style="text-align:right;">Resolution</td>
<td>---
</td>
<td>FIXED
</td>
</tr>
<tr>
<td style="text-align:right;">CC</td>
<td>
</td>
<td>i@maskray.me
</td>
</tr>
<tr>
<td style="text-align:right;">Status</td>
<td>NEW
</td>
<td>RESOLVED
</td>
</tr></table>
<p>
<div>
<b><a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - missing error on reference to undefined weak symbol"
href="https://bugs.llvm.org/show_bug.cgi?id=34058#c1">Comment # 1</a>
on <a class="bz_bug_link
bz_status_RESOLVED bz_closed"
title="RESOLVED FIXED - missing error on reference to undefined weak symbol"
href="https://bugs.llvm.org/show_bug.cgi?id=34058">bug 34058</a>
from <span class="vcard"><a class="email" href="mailto:i@maskray.me" title="Fangrui Song <i@maskray.me>"> <span class="fn">Fangrui Song</span></a>
</span></b>
<pre>leaq foo(%rip), %rax # R_X86_64_PC32
movabsq $foo-., %rax # R_X86_64_PC64
.weak foo
.hidden foo
The idea was implemented in D19844/r268350. Note, ld.bfd/gold error on
R_X86_64_PC32:
% ld.bfd a.o -shared -o a
ld.bfd: a.o: relocation R_X86_64_PC32 against undefined hidden symbol `foo' can
not be used when making a shared object
ld.bfd: final link failed: Bad value
% gold a.o -shared -o a
gold: error: a.o: requires dynamic R_X86_64_PC32 reloc against 'foo' which may
overflow at runtime; recompile with -fPIC
The error is bogus as this should be fine if the link-time address is smaller
than 0x80000000.
% ld.lld a.o -shared -o a
% ld.lld a.o -shared -o a -Ttext=0x80000000
ld.lld: error: a.o:(.text+0x3): relocation R_X86_64_PC32 out of range:
-2147483655 is not in [-2147483648, 2147483647]</pre>
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