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llvm-ar: Pad the symbol table to 4 bytes.

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It looks like ld64 requires it. With this we seem to be able to bootstrap using
llvm-ar+/usr/bin/true instead of ar+ranlib (currently on stage2).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241842 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Rafael Espindola
2015-07-09 19:48:06 +00:00
parent 0685a5c5ed
commit 7255090cd3
2 changed files with 13 additions and 2 deletions
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7
lib/Object/ArchiveWriter.cpp
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@@ -237,8 +237,11 @@ writeSymbolTable(raw_fd_ostream &Out, object::Archive::Kind Kind,
print32(Out, Kind, StringTable.size()); // byte count of the string table
Out << StringTable;
if (Out.tell() % 2)
Out << '\0';
// ld64 requires the next member header to start at an offset that is
// 4 bytes aligned.
unsigned Pad = OffsetToAlignment(Out.tell(), 4);
while (Pad--)
Out.write(uint8_t(0));
// Patch up the size of the symbol table now that we know how big it is.
unsigned Pos = Out.tell();