Use default value if QNX_TARGET is not set

Author: flba-eb

compiler/rustc_target/src/spec/targets/aarch64_unknown_nto_qnx710_iosock.rs

@@ -18,7 +18,7 @@ pub(crate) fn target() -> Target {
 // More information:
 // https://www.qnx.com/developers/docs/7.1/index.html#com.qnx.doc.neutrino.io_sock/topic/migrate_app.html
 fn get_iosock_param() -> &'static str {
-    let target_dir = std::env::var("QNX_TARGET").expect("Environment variable QNX_TARGET is set");
+    let target_dir = std::env::var("QNX_TARGET").unwrap_or_else(|_| "PLEASE_SET_ENV_VAR_QNX_TARGET".into());
     let linker_param = format!("-L{target_dir}/aarch64le/io-sock/lib");
 
     linker_param.leak()

tests/assembly/targets/targets-elf.rs

@@ -58,8 +58,8 @@
 //@ [aarch64_unknown_nto_qnx710] compile-flags: --target aarch64-unknown-nto-qnx710
 //@ [aarch64_unknown_nto_qnx710] needs-llvm-components: aarch64
 //@ revisions: aarch64_unknown_nto_qnx710_iosock
-//@ [aarch64_unknown_nto_qnx710] compile-flags: --target aarch64-unknown-nto-qnx710_iosock
-//@ [aarch64_unknown_nto_qnx710] needs-llvm-components: aarch64
+//@ [aarch64_unknown_nto_qnx710_iosock] compile-flags: --target aarch64-unknown-nto-qnx710_iosock
+//@ [aarch64_unknown_nto_qnx710_iosock] needs-llvm-components: aarch64
 //@ revisions: aarch64_unknown_openbsd
 //@ [aarch64_unknown_openbsd] compile-flags: --target aarch64-unknown-openbsd
 //@ [aarch64_unknown_openbsd] needs-llvm-components: aarch64