Declare the minimum supported Rust version

mold needs Rust 1.95 for std::hint::cold_path and the atomic update
methods, while its dependencies need only 1.85. Declaring it makes Cargo
reject older toolchains with a clear message before building, and lets
the resolver avoid dependency versions that need a newer rustc.

Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "A high-performance ELF linker, rewritten in Rust"
 license.workspace = true
 # tests/lib.rs belongs to the mold-tests workspace crate.
@@ -18,6 +19,7 @@ default-members = [".", "cli", "arch/*", "tests"]
 [workspace.package]
 version = "2.42.1"
 edition = "2024"
+rust-version = "1.95"
 license = "MIT"
 
 [workspace.dependencies]

arch/arm32/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-arm32"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for arm32"
 license.workspace = true
 

arch/arm32be/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-arm32be"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for arm32be"
 license.workspace = true
 

arch/arm64/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-arm64"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for arm64"
 license.workspace = true
 

arch/arm64be/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-arm64be"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for arm64be"
 license.workspace = true
 

arch/i386/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-i386"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for i386"
 license.workspace = true
 

arch/loongarch32/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-loongarch32"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for loongarch32"
 license.workspace = true
 

arch/loongarch64/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-loongarch64"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for loongarch64"
 license.workspace = true
 

arch/m68k/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-m68k"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for m68k"
 license.workspace = true
 

arch/ppc32/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-ppc32"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for ppc32"
 license.workspace = true
 

arch/ppc64v1/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-ppc64v1"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for ppc64v1"
 license.workspace = true
 

arch/ppc64v2/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-ppc64v2"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for ppc64v2"
 license.workspace = true
 

arch/riscv32/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-riscv32"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for riscv32"
 license.workspace = true
 

arch/riscv32be/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-riscv32be"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for riscv32be"
 license.workspace = true
 

arch/riscv64/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-riscv64"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for riscv64"
 license.workspace = true
 

arch/riscv64be/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-riscv64be"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for riscv64be"
 license.workspace = true
 

arch/s390x/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-s390x"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for s390x"
 license.workspace = true
 

arch/sh4/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-sh4"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for sh4"
 license.workspace = true
 

arch/sh4be/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-sh4be"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for sh4be"
 license.workspace = true
 

arch/sparc64/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-sparc64"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for sparc64"
 license.workspace = true
 

arch/x86_64/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-target-x86_64"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold linker instantiated for x86_64"
 license.workspace = true
 

cli/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-cli"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "The mold executable"
 license.workspace = true
 

tests/Cargo.toml

@@ -2,6 +2,7 @@
 name = "mold-tests"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "Test support for mold's shell test suite"
 license.workspace = true
 publish = false