rustc_target: Flip the default for TargetOptions::executables to true

Also change `executables` to true for linux-kernel and windows-uwp-gnu targets

compiler/rustc_target/src/spec/aarch64_unknown_none.rs

@@ -13,7 +13,6 @@ pub fn target() -> Target {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         features: "+strict-align,+neon,+fp-armv8".into(),
-        executables: true,
         relocation_model: RelocModel::Static,
         disable_redzone: true,
         max_atomic_width: Some(128),

compiler/rustc_target/src/spec/aarch64_unknown_none_softfloat.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         features: "+strict-align,-neon,-fp-armv8".into(),
-        executables: true,
         relocation_model: RelocModel::Static,
         disable_redzone: true,
         max_atomic_width: Some(128),

compiler/rustc_target/src/spec/apple_base.rs

@@ -25,7 +25,6 @@ pub fn opts(os: &'static str) -> TargetOptions {
         function_sections: false,
         dynamic_linking: true,
         linker_is_gnu: false,
-        executables: true,
         families: cvs!["unix"],
         is_like_osx: true,
         default_dwarf_version: 2,

compiler/rustc_target/src/spec/apple_sdk_base.rs

@@ -54,7 +54,6 @@ pub fn opts(os: &'static str, arch: Arch) -> TargetOptions {
         abi: target_abi(arch).into(),
         cpu: target_cpu(arch).into(),
         dynamic_linking: false,
-        executables: true,
         link_env_remove: link_env_remove(arch),
         has_thread_local: false,
         ..super::apple_base::opts(os)

compiler/rustc_target/src/spec/armebv7r_none_eabi.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
             abi: "eabi".into(),
             endian: Endian::Big,
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-            executables: true,
             linker: Some("rust-lld".into()),
             relocation_model: RelocModel::Static,
             panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/armebv7r_none_eabihf.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
             abi: "eabihf".into(),
             endian: Endian::Big,
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-            executables: true,
             linker: Some("rust-lld".into()),
             relocation_model: RelocModel::Static,
             panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/armv6k_nintendo_3ds.rs

@@ -23,7 +23,6 @@ pub fn target() -> Target {
             abi: "eabihf".into(),
             linker_flavor: LinkerFlavor::Gcc,
             cpu: "mpcore".into(),
-            executables: true,
             families: cvs!["unix"],
             linker: Some("arm-none-eabi-gcc".into()),
             relocation_model: RelocModel::Static,

compiler/rustc_target/src/spec/armv7a_none_eabi.rs

@@ -22,7 +22,6 @@ pub fn target() -> Target {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         features: "+v7,+thumb2,+soft-float,-neon,+strict-align".into(),
-        executables: true,
         relocation_model: RelocModel::Static,
         disable_redzone: true,
         max_atomic_width: Some(64),

compiler/rustc_target/src/spec/armv7a_none_eabihf.rs

@@ -13,7 +13,6 @@ pub fn target() -> Target {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         features: "+v7,+vfp3,-d32,+thumb2,-neon,+strict-align".into(),
-        executables: true,
         relocation_model: RelocModel::Static,
         disable_redzone: true,
         max_atomic_width: Some(64),

compiler/rustc_target/src/spec/armv7r_none_eabi.rs

@@ -13,7 +13,6 @@ pub fn target() -> Target {
         options: TargetOptions {
             abi: "eabi".into(),
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-            executables: true,
             linker: Some("rust-lld".into()),
             relocation_model: RelocModel::Static,
             panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/armv7r_none_eabihf.rs

@@ -13,7 +13,6 @@ pub fn target() -> Target {
         options: TargetOptions {
             abi: "eabihf".into(),
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-            executables: true,
             linker: Some("rust-lld".into()),
             relocation_model: RelocModel::Static,
             panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/avr_gnu_base.rs

@@ -16,7 +16,6 @@ pub fn target(target_cpu: &'static str, mmcu: &'static str) -> Target {
             exe_suffix: ".elf".into(),
 
             linker: Some("avr-gcc".into()),
-            executables: true,
             eh_frame_header: false,
             pre_link_args: TargetOptions::link_args(LinkerFlavor::Gcc, &[mmcu]),
             late_link_args: TargetOptions::link_args(LinkerFlavor::Gcc, &["-lgcc"]),

compiler/rustc_target/src/spec/bpf_base.rs

@@ -7,7 +7,6 @@ pub fn opts(endian: Endian) -> TargetOptions {
         endian,
         linker_flavor: LinkerFlavor::BpfLinker,
         atomic_cas: false,
-        executables: true,
         dynamic_linking: true,
         no_builtins: true,
         panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/dragonfly_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "dragonfly".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/freebsd_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "freebsd".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/fuchsia_base.rs

@@ -23,7 +23,6 @@ pub fn opts() -> TargetOptions {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         pre_link_args,
         pre_link_objects: crt_objects::new(&[

compiler/rustc_target/src/spec/haiku_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "haiku".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         relro_level: RelroLevel::Full,
         ..Default::default()

compiler/rustc_target/src/spec/hermit_base.rs

@@ -10,7 +10,6 @@ pub fn opts() -> TargetOptions {
         os: "hermit".into(),
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
         linker: Some("rust-lld".into()),
-        executables: true,
         has_thread_local: true,
         pre_link_args,
         panic_strategy: PanicStrategy::Abort,

compiler/rustc_target/src/spec/hexagon_unknown_linux_musl.rs

@@ -11,7 +11,6 @@ pub fn target() -> Target {
     base.has_rpath = true;
     base.linker_is_gnu = false;
     base.dynamic_linking = true;
-    base.executables = true;
 
     base.c_enum_min_bits = 8;
 

compiler/rustc_target/src/spec/illumos_base.rs

@@ -27,7 +27,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "illumos".into(),
         dynamic_linking: true,
-        executables: true,
         has_rpath: true,
         families: cvs!["unix"],
         is_like_solaris: true,

compiler/rustc_target/src/spec/l4re_base.rs

@@ -5,7 +5,6 @@ pub fn opts() -> TargetOptions {
         os: "l4re".into(),
         env: "uclibc".into(),
         linker_flavor: LinkerFlavor::L4Bender,
-        executables: true,
         panic_strategy: PanicStrategy::Abort,
         linker: Some("l4-bender".into()),
         linker_is_gnu: false,

compiler/rustc_target/src/spec/linux_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "linux".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/mipsel_sony_psp.rs

@@ -18,7 +18,6 @@ pub fn target() -> Target {
             vendor: "sony".into(),
             linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
             cpu: "mips2".into(),
-            executables: true,
             linker: Some("rust-lld".into()),
             relocation_model: RelocModel::Static,
 

compiler/rustc_target/src/spec/mipsel_unknown_none.rs

@@ -17,7 +17,6 @@ pub fn target() -> Target {
             cpu: "mips32r2".into(),
             features: "+mips32r2,+soft-float,+noabicalls".into(),
             max_atomic_width: Some(32),
-            executables: true,
             linker: Some("rust-lld".into()),
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,

compiler/rustc_target/src/spec/mod.rs

@@ -1212,8 +1212,7 @@ pub struct TargetOptions {
     pub dynamic_linking: bool,
     /// If dynamic linking is available, whether only cdylibs are supported.
     pub only_cdylib: bool,
-    /// Whether executables are available on this target. iOS, for example, only allows static
+    /// Whether executables are available on this target. Defaults to true.
-    /// libraries. Defaults to false.
     pub executables: bool,
     /// Relocation model to use in object file. Corresponds to `llc
     /// -relocation-model=$relocation_model`. Defaults to `Pic`.
@@ -1520,7 +1519,7 @@ impl Default for TargetOptions {
             features: "".into(),
             dynamic_linking: false,
             only_cdylib: false,
-            executables: false,
+            executables: true,
             relocation_model: RelocModel::Pic,
             code_model: None,
             tls_model: TlsModel::GeneralDynamic,

compiler/rustc_target/src/spec/msp430_none_elf.rs

@@ -9,7 +9,6 @@ pub fn target() -> Target {
 
         options: TargetOptions {
             c_int_width: "16".into(),
-            executables: true,
 
             // The LLVM backend currently can't generate object files. To
             // workaround this LLVM generates assembly files which then we feed

compiler/rustc_target/src/spec/msvc_base.rs

@@ -7,7 +7,6 @@ pub fn opts() -> TargetOptions {
 
     TargetOptions {
         linker_flavor: LinkerFlavor::Msvc,
-        executables: true,
         is_like_windows: true,
         is_like_msvc: true,
         lld_flavor: LldFlavor::Link,

compiler/rustc_target/src/spec/netbsd_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "netbsd".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         no_default_libraries: false,
         has_rpath: true,

compiler/rustc_target/src/spec/nvptx64_nvidia_cuda.rs

@@ -26,7 +26,6 @@ pub fn target() -> Target {
 
             // Needed to use `dylib` and `bin` crate types and the linker.
             dynamic_linking: true,
-            executables: true,
 
             // Avoid using dylib because it contain metadata not supported
             // by LLVM NVPTX backend.

compiler/rustc_target/src/spec/openbsd_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "openbsd".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         abi_return_struct_as_int: true,

compiler/rustc_target/src/spec/redox_base.rs

@@ -5,7 +5,6 @@ pub fn opts() -> TargetOptions {
         os: "redox".into(),
         env: "relibc".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         position_independent_executables: true,

compiler/rustc_target/src/spec/riscv32i_unknown_none_elf.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
             cpu: "generic-rv32".into(),
             max_atomic_width: Some(0),
             atomic_cas: false,
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             emit_debug_gdb_scripts: false,

compiler/rustc_target/src/spec/riscv32im_unknown_none_elf.rs

@@ -15,7 +15,6 @@ pub fn target() -> Target {
             max_atomic_width: Some(0),
             atomic_cas: false,
             features: "+m".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             emit_debug_gdb_scripts: false,

compiler/rustc_target/src/spec/riscv32imac_unknown_none_elf.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
             cpu: "generic-rv32".into(),
             max_atomic_width: Some(32),
             features: "+m,+a,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             emit_debug_gdb_scripts: false,

compiler/rustc_target/src/spec/riscv32imac_unknown_xous_elf.rs

@@ -15,7 +15,6 @@ pub fn target() -> Target {
             cpu: "generic-rv32".into(),
             max_atomic_width: Some(32),
             features: "+m,+a,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             ..Default::default()

compiler/rustc_target/src/spec/riscv32imc_esp_espidf.rs

@@ -26,7 +26,6 @@ pub fn target() -> Target {
             atomic_cas: true,
 
             features: "+m,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             emit_debug_gdb_scripts: false,

compiler/rustc_target/src/spec/riscv32imc_unknown_none_elf.rs

@@ -15,7 +15,6 @@ pub fn target() -> Target {
             max_atomic_width: Some(0),
             atomic_cas: false,
             features: "+m,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             emit_debug_gdb_scripts: false,

compiler/rustc_target/src/spec/riscv64gc_unknown_none_elf.rs

@@ -15,7 +15,6 @@ pub fn target() -> Target {
             cpu: "generic-rv64".into(),
             max_atomic_width: Some(64),
             features: "+m,+a,+f,+d,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             code_model: Some(CodeModel::Medium),

compiler/rustc_target/src/spec/riscv64imac_unknown_none_elf.rs

@@ -14,7 +14,6 @@ pub fn target() -> Target {
             cpu: "generic-rv64".into(),
             max_atomic_width: Some(64),
             features: "+m,+a,+c".into(),
-            executables: true,
             panic_strategy: PanicStrategy::Abort,
             relocation_model: RelocModel::Static,
             code_model: Some(CodeModel::Medium),

compiler/rustc_target/src/spec/solaris_base.rs

@@ -4,7 +4,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         os: "solaris".into(),
         dynamic_linking: true,
-        executables: true,
         has_rpath: true,
         families: cvs!["unix"],
         is_like_solaris: true,

compiler/rustc_target/src/spec/solid_base.rs

@@ -5,6 +5,7 @@ pub fn opts(kernel: &str) -> TargetOptions {
     TargetOptions {
         os: format!("solid_{}", kernel).into(),
         vendor: "kmc".into(),
+        executables: false,
         frame_pointer: FramePointer::NonLeaf,
         has_thread_local: true,
         ..Default::default()

compiler/rustc_target/src/spec/thumb_base.rs

@@ -34,7 +34,6 @@ pub fn opts() -> TargetOptions {
     // See rust-lang/rfcs#1645 for a discussion about these defaults
     TargetOptions {
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-        executables: true,
         // In most cases, LLD is good enough
         linker: Some("rust-lld".into()),
         // Because these devices have very little resources having an unwinder is too onerous so we

compiler/rustc_target/src/spec/vxworks_base.rs

@@ -8,7 +8,6 @@ pub fn opts() -> TargetOptions {
         linker: Some("wr-c++".into()),
         exe_suffix: ".vxe".into(),
         dynamic_linking: true,
-        executables: true,
         families: cvs!["unix"],
         has_rpath: true,
         has_thread_local: true,

compiler/rustc_target/src/spec/wasm_base.rs

@@ -62,9 +62,6 @@ pub fn options() -> TargetOptions {
         dynamic_linking: true,
         only_cdylib: true,
 
-        // This means we'll just embed a `#[start]` function in the wasm module
-        executables: true,
-
         // relatively self-explanatory!
         exe_suffix: ".wasm".into(),
         dll_prefix: "".into(),

compiler/rustc_target/src/spec/windows_gnu_base.rs

@@ -67,7 +67,6 @@ pub fn opts() -> TargetOptions {
         function_sections: false,
         linker: Some("gcc".into()),
         dynamic_linking: true,
-        executables: true,
         dll_prefix: "".into(),
         dll_suffix: ".dll".into(),
         exe_suffix: ".exe".into(),

compiler/rustc_target/src/spec/windows_gnullvm_base.rs

@@ -20,7 +20,6 @@ pub fn opts() -> TargetOptions {
         abi: "llvm".into(),
         linker: Some("clang".into()),
         dynamic_linking: true,
-        executables: true,
         dll_prefix: "".into(),
         dll_suffix: ".dll".into(),
         exe_suffix: ".exe".into(),

compiler/rustc_target/src/spec/windows_uwp_gnu_base.rs

@@ -24,7 +24,6 @@ pub fn opts() -> TargetOptions {
     TargetOptions {
         abi: "uwp".into(),
         vendor: "uwp".into(),
-        executables: false,
         limit_rdylib_exports: false,
         late_link_args,
         late_link_args_dynamic,

compiler/rustc_target/src/spec/x86_64_fortanix_unknown_sgx.rs

@@ -62,7 +62,6 @@ pub fn target() -> Target {
         vendor: "fortanix".into(),
         abi: "fortanix".into(),
         linker_flavor: LinkerFlavor::Lld(LldFlavor::Ld),
-        executables: true,
         linker: Some("rust-lld".into()),
         max_atomic_width: Some(64),
         cpu: "x86-64".into(),

compiler/rustc_target/src/spec/x86_64_unknown_none.rs

@@ -24,7 +24,6 @@ pub fn target() -> Target {
         features:
             "-mmx,-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-3dnow,-3dnowa,-avx,-avx2,+soft-float"
                 .into(),
-        executables: true,
         disable_redzone: true,
         panic_strategy: PanicStrategy::Abort,
         code_model: Some(CodeModel::Kernel),

src/test/run-make-fulldeps/target-specs/Makefile

@@ -8,4 +8,4 @@ all:
 	RUST_TARGET_PATH=. $(RUSTC) foo.rs --target=my-x86_64-unknown-linux-gnu-platform --crate-type=lib --emit=asm
 	$(RUSTC) -Z unstable-options --target=my-awesome-platform.json --print target-spec-json > $(TMPDIR)/test-platform.json && $(RUSTC) -Z unstable-options --target=$(TMPDIR)/test-platform.json --print target-spec-json | diff -q $(TMPDIR)/test-platform.json -
 	$(RUSTC) foo.rs --target=definitely-not-builtin-target 2>&1 | $(CGREP) 'may not set is_builtin'
-	$(RUSTC) foo.rs --target=mismatching-data-layout
+	$(RUSTC) foo.rs --target=mismatching-data-layout --crate-type=lib