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debuginfo: Clamp the maximum dwarf version to 3

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This is a consequence of #13611 and our bots running a "fairly old" gdb which
doesn't understand the newer versions of dwarf.
This commit is contained in:
Alex Crichton 2014-04-18 16:54:38 -07:00
parent ad3de7fdb5
commit 426d701f8b
1 changed files with 6 additions and 0 deletions
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6
src/librustc/middle/trans/debuginfo.rs
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@ -279,6 +279,12 @@ pub fn finalize(cx: &CrateContext) {
if cx.sess().targ_cfg.os == abi::OsMacos {
"Dwarf Version".with_c_str(
|s| llvm::LLVMRustAddModuleFlag(cx.llmod, s, 2));
} else {
// FIXME(#13611) this is a kludge fix because the linux bots have
// gdb 7.4 which doesn't understand dwarf4, we should
// do something more graceful here.
"Dwarf Version".with_c_str(
|s| llvm::LLVMRustAddModuleFlag(cx.llmod, s, 3));
}
// Prevent bitcode readers from deleting the debug info.