Rollup merge of rust-lang#135501 - tgross35:stdlib-dependencies-private, r=bjorn3

Inject `compiler_builtins` during postprocessing and ensure it is made private

Follow up of rust-lang#135278

Do the following:

* Inject `compiler_builtins` during postprocessing, rather than injecting `extern crate compiler_builtins as _` into the AST
* Do not make dependencies of `std` private by default (this was added in rust-lang#135278)
* Make sure sysroot crates correctly mark their dependencies private/public
* Ensure that marking a dependency private makes its dependents private by default as well, unless otherwise specified
* Do the `compiler_builtins` update that has been blocked on this

There is more detail in the commit messages. This includes the changes I was working on in rust-lang#136226.

try-job: test-various
try-job: x86_64-msvc-1
try-job: x86_64-msvc-2
try-job: i686-mingw-1
try-job: i686-mingw-2

Author: matthiaskrgr

alloc/Cargo.toml

@@ -1,3 +1,5 @@
+cargo-features = ["public-dependency"]
+
 [package]
 name = "alloc"
 version = "0.0.0"
@@ -9,7 +11,7 @@ autobenches = false
 edition = "2021"
 
 [dependencies]
-core = { path = "../core" }
+core = { path = "../core", public = true }
 compiler_builtins = { version = "=0.1.146", features = ['rustc-dep-of-std'] }
 
 [dev-dependencies]

std/src/sys/pal/uefi/process.rs

@@ -388,7 +388,7 @@ mod uefi_command_internal {
             }
         }
 
-        pub fn start_image(&mut self) -> io::Result<r_efi::efi::Status> {
+        pub(crate) fn start_image(&mut self) -> io::Result<r_efi::efi::Status> {
             self.update_st_crc32()?;
 
             // Use our system table instead of the default one

std/src/sys/pal/uefi/time.rs

@@ -84,7 +84,7 @@ pub(crate) mod system_time_internal {
 
     // This algorithm is based on the one described in the post
     // https://blog.reverberate.org/2020/05/12/optimizing-date-algorithms.html
-    pub const fn uefi_time_to_duration(t: r_efi::system::Time) -> Duration {
+    pub(crate) const fn uefi_time_to_duration(t: r_efi::system::Time) -> Duration {
         assert!(t.month <= 12);
         assert!(t.month != 0);
 

sysroot/Cargo.toml

@@ -1,14 +1,16 @@
+cargo-features = ["public-dependency"]
+
 [package]
 name = "sysroot"
 version = "0.0.0"
 edition = "2021"
 
 # this is a dummy crate to ensure that all required crates appear in the sysroot
 [dependencies]
-proc_macro = { path = "../proc_macro" }
+proc_macro = { path = "../proc_macro", public = true }
 profiler_builtins = { path = "../profiler_builtins", optional = true }
-std = { path = "../std" }
-test = { path = "../test" }
+std = { path = "../std", public = true }
+test = { path = "../test", public = true }
 
 # Forward features to the `std` crate as necessary
 [features]

test/Cargo.toml

@@ -1,12 +1,14 @@
+cargo-features = ["public-dependency"]
+
 [package]
 name = "test"
 version = "0.0.0"
 edition = "2021"
 
 [dependencies]
 getopts = { version = "0.2.21", features = ['rustc-dep-of-std'] }
-std = { path = "../std" }
-core = { path = "../core" }
+std = { path = "../std", public = true }
+core = { path = "../core", public = true }
 
 [target.'cfg(not(all(windows, target_env = "msvc")))'.dependencies]
 libc = { version = "0.2.150", default-features = false }