fix: add default host C++ toolchains for Rust binaries

avrabe · avrabe · commit 07dc8c7e5fea · 2025-08-26T06:00:47.000+02:00
Add @bazel_tools//tools/cpp:all to toolchain registration to support
building Rust binaries like file_operations_component on Linux CI.

Without this, Linux CI fails with:
'No matching toolchains found for types: @@bazel_tools//tools/cpp:toolchain_type'

macOS works because apple_support provides C++ toolchains automatically,
but Linux needs explicit registration of default host toolchains.
diff --git a/MODULE.bazel b/MODULE.bazel
@@ -111,6 +111,7 @@ use_repo(wasi_sdk, "wasi_sdk")
 register_toolchains(
     "@wasi_sdk//:wasi_sdk_toolchain",
     "@wasi_sdk//:cc_toolchain",
+    "@bazel_tools//tools/cpp:all",  # Default host C++ toolchains for Rust binaries
 )
 
 # TinyGo WASI Preview 2 toolchain

Original file line number	Diff line number	Diff line change
`@@ -111,6 +111,7 @@ use_repo(wasi_sdk, "wasi_sdk")`
`111`	`111`	`register_toolchains(`
`112`	`112`	`"@wasi_sdk//:wasi_sdk_toolchain",`
`113`	`113`	`"@wasi_sdk//:cc_toolchain",`
	`114`	`+ "@bazel_tools//tools/cpp:all", # Default host C++ toolchains for Rust binaries`
`114`	`115`	`)`
`115`	`116`
`116`	`117`	`# TinyGo WASI Preview 2 toolchain`