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Add comment explaining why libunwind doesn't need to link libgcc_eh

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This commit is contained in:
Josh Triplett 2020-10-01 11:13:13 -07:00
parent a3944a0abd
commit d9f29fd9ed
1 changed files with 3 additions and 0 deletions
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3
library/unwind/src/lib.rs
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@ -42,6 +42,9 @@ cfg_if::cfg_if! {
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
// When building with crt-static, we get `gcc_eh` from the `libc` crate, since
// glibc needs it, and needs it listed later on the linker command line. We
// don't want to duplicate it here.
#[cfg(all(target_os = "linux", target_env = "gnu", not(feature = "llvm-libunwind")))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}