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#![no_std]
#![unstable(feature = "panic_unwind", issue = "32837")]
#![feature(link_cfg)]
#![feature(staged_api)]
#![feature(c_unwind)]
#![feature(cfg_target_abi)]
#![cfg_attr(not(target_env = "msvc"), feature(libc))]
#![cfg_attr(not(bootstrap), allow(internal_features))]
cfg_if::cfg_if! {
if #[cfg(target_env = "msvc")] {
// Windows MSVC no extra unwinder support needed
} else if #[cfg(any(
target_os = "l4re",
target_os = "none",
target_os = "espidf",
))] {
// These "unix" family members do not have unwinder.
} else if #[cfg(any(
unix,
windows,
target_os = "psp",
target_os = "solid_asp3",
all(target_vendor = "fortanix", target_env = "sgx"),
))] {
mod libunwind;
pub use libunwind::*;
} else {
// no unwinder on the system!
// - wasm32 (not emscripten, which is "unix" family)
// - os=none ("bare metal" targets)
// - os=hermit
// - os=uefi
// - os=cuda
// - nvptx64-nvidia-cuda
// - Any new targets not listed above.
}
}
#[cfg(target_env = "musl")]
cfg_if::cfg_if! {
if #[cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind"))] {
compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
} else if #[cfg(feature = "llvm-libunwind")] {
#[link(name = "unwind", kind = "static", modifiers = "-bundle")]
extern "C" {}
} else if #[cfg(feature = "system-llvm-libunwind")] {
#[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
extern "C" {}
} else {
#[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
}
}
// This is the same as musl except that we default to using the system libunwind
// instead of libgcc.
#[cfg(target_env = "ohos")]
cfg_if::cfg_if! {
if #[cfg(all(feature = "llvm-libunwind", feature = "system-llvm-libunwind"))] {
compile_error!("`llvm-libunwind` and `system-llvm-libunwind` cannot be enabled at the same time");
} else if #[cfg(feature = "llvm-libunwind")] {
#[link(name = "unwind", kind = "static", modifiers = "-bundle")]
extern "C" {}
} else {
#[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
extern "C" {}
}
}
#[cfg(target_os = "android")]
cfg_if::cfg_if! {
if #[cfg(feature = "llvm-libunwind")] {
compile_error!("`llvm-libunwind` is not supported for Android targets");
} else if #[cfg(feature = "system-llvm-libunwind")] {
#[link(name = "unwind", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
extern "C" {}
} else {
#[link(name = "gcc", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "gcc", cfg(not(target_feature = "crt-static")))]
extern "C" {}
}
}
// Android's unwinding library depends on dl_iterate_phdr in `libdl`.
#[cfg(target_os = "android")]
#[link(name = "dl", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "dl", 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",
any(target_env = "gnu", target_env = "uclibc"),
not(feature = "llvm-libunwind"),
not(feature = "system-llvm-libunwind")
))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
#[cfg(all(
target_os = "linux",
any(target_env = "gnu", target_env = "uclibc"),
not(feature = "llvm-libunwind"),
feature = "system-llvm-libunwind"
))]
#[link(name = "unwind", cfg(not(target_feature = "crt-static")))]
extern "C" {}
#[cfg(target_os = "redox")]
#[link(name = "gcc_eh", kind = "static", modifiers = "-bundle", cfg(target_feature = "crt-static"))]
#[link(name = "gcc_s", cfg(not(target_feature = "crt-static")))]
extern "C" {}
#[cfg(all(target_vendor = "fortanix", target_env = "sgx"))]
#[link(name = "unwind", kind = "static", modifiers = "-bundle")]
extern "C" {}
#[cfg(any(target_os = "freebsd", target_os = "netbsd"))]
#[link(name = "gcc_s")]
extern "C" {}
#[cfg(all(target_os = "openbsd", target_arch = "sparc64"))]
#[link(name = "gcc")]
extern "C" {}
#[cfg(all(target_os = "openbsd", not(target_arch = "sparc64")))]
#[link(name = "c++abi")]
extern "C" {}
#[cfg(any(target_os = "solaris", target_os = "illumos"))]
#[link(name = "gcc_s")]
extern "C" {}
#[cfg(target_os = "dragonfly")]
#[link(name = "gcc_pic")]
extern "C" {}
#[cfg(target_os = "haiku")]
#[link(name = "gcc_s")]
extern "C" {}
#[cfg(target_os = "nto")]
#[link(name = "gcc_s")]
extern "C" {}
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