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-rw-r--r--config.toml.example29
1 files changed, 22 insertions, 7 deletions
diff --git a/config.toml.example b/config.toml.example
index 6e53d9b442f..b3946b67b0d 100644
--- a/config.toml.example
+++ b/config.toml.example
@@ -473,13 +473,28 @@ changelog-seen = 2
 # FIXME(#61117): Some tests fail when this option is enabled.
 #debuginfo-level-tests = 0
 
-# Whether to run `dsymutil` on Apple platforms to gather debug info into .dSYM
-# bundles. `dsymutil` adds time to builds for no clear benefit, and also makes
-# it more difficult for debuggers to find debug info. The compiler currently
-# defaults to running `dsymutil` to preserve its historical default, but when
-# compiling the compiler itself, we skip it by default since we know it's safe
-# to do so in that case.
-#run-dsymutil = false
+# Should rustc be build with split debuginfo? Default is platform dependent.
+# Valid values are the same as those accepted by `-C split-debuginfo`
+# (`off`/`unpacked`/`packed`).
+#
+# On Linux, packed split debuginfo is used by default, which splits debuginfo
+# into a separate `rustc.dwp` file. Split DWARF on Linux results in lower
+# linking times (there's less debuginfo for the linker to process),
+# `split-debuginfo` is enabled on default for Linux. Unpacked debuginfo could
+# technically work too, but the cost of running the DWARF packager is marginal
+# and results in debuginfo being in a single file.
+#
+# On Apple platforms, unpacked split debuginfo is used by default. Unpacked
+# debuginfo does not run `dsymutil`, which packages debuginfo from disparate
+# object files into a single `.dSYM` file. `dsymutil` adds time to builds for
+# no clear benefit, and also makes it more difficult for debuggers to find
+# debug info. The compiler currently defaults to running `dsymutil` to preserve
+# its historical default, but when compiling the compiler itself, we skip it by
+# default since we know it's safe to do so in that case.
+#
+# On Windows platforms, packed debuginfo is the only supported option,
+# producing a `.pdb` file.
+#split-debuginfo = if linux { packed } else if windows { packed } else if apple { unpacked }
 
 # Whether or not `panic!`s generate backtraces (RUST_BACKTRACE)
 #backtrace = true