DO NOT MERGE: temporarily use libc from git tag for CI testing

This commit patches the libc dependency to use the git tag ctest-v0.5.0
which contains the QuRT support changes needed for hexagon-unknown-qurt.

This is a temporary commit for CI testing purposes only and should be
removed before merging the PR.

Author: androm3da

library/Cargo.lock

@@ -83,7 +83,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06cdfe340b16dd990c54cce79743613fa09fbb16774f33a77c9fd196f8f3fa30"
 dependencies = [
  "cfg-if",
- "libc",
+ "libc 0.2.180",
  "rustc-std-workspace-core",
  "windows-sys",
 ]
@@ -146,9 +146,17 @@ dependencies = [
 
 [[package]]
 name = "libc"
-version = "0.2.178"
+version = "0.2.180"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "37c93d8daa9d8a012fd8ab92f088405fb202ea0b6ab73ee2482ae66af4f42091"
+checksum = "bcc35a38544a891a5f7c865aca548a982ccb3b8650a5b06d0fd33a10283c56fc"
+dependencies = [
+ "rustc-std-workspace-core",
+]
+
+[[package]]
+name = "libc"
+version = "1.0.0-alpha.2"
+source = "git+https://github.com/rust-lang/libc?tag=ctest-v0.5.0#e4db084fe027925174bb776877e96afdf31da4b2"
 dependencies = [
  "rustc-std-workspace-core",
 ]
@@ -199,7 +207,7 @@ name = "panic_abort"
 version = "0.0.0"
 dependencies = [
  "alloc",
- "libc",
+ "libc 0.2.180",
  "rustc-std-workspace-core",
 ]
 
@@ -208,7 +216,7 @@ name = "panic_unwind"
 version = "0.0.0"
 dependencies = [
  "alloc",
- "libc",
+ "libc 0.2.180",
  "rustc-std-workspace-core",
  "unwind",
 ]
@@ -330,7 +338,7 @@ dependencies = [
  "fortanix-sgx-abi",
  "hashbrown",
  "hermit-abi",
- "libc",
+ "libc 1.0.0-alpha.2",
  "miniz_oxide",
  "moto-rt",
  "object",
@@ -353,7 +361,7 @@ dependencies = [
 name = "std_detect"
 version = "0.1.5"
 dependencies = [
- "libc",
+ "libc 0.2.180",
  "rustc-std-workspace-alloc",
  "rustc-std-workspace-core",
 ]
@@ -374,15 +382,15 @@ version = "0.0.0"
 dependencies = [
  "core",
  "getopts",
- "libc",
+ "libc 0.2.180",
  "std",
 ]
 
 [[package]]
 name = "unwind"
 version = "0.0.0"
 dependencies = [
- "libc",
+ "libc 0.2.180",
  "rustc-std-workspace-core",
  "unwinding",
 ]

library/Cargo.toml

@@ -85,3 +85,5 @@ rustflags = [
 rustc-std-workspace-core = { path = 'rustc-std-workspace-core' }
 rustc-std-workspace-alloc = { path = 'rustc-std-workspace-alloc' }
 rustc-std-workspace-std = { path = 'rustc-std-workspace-std' }
+# Temporary: use libc from git tag with QuRT support (for CI testing, not for merge)
+libc = { git = "https://github.com/rust-lang/libc", tag = "ctest-v0.5.0" }