internal/rosa: bootstrap cmake in two steps

This enables cross-compilation via the standard CMake helper.

Signed-off-by: Ophestra <cat@gensokyo.uk>

1 files changed, 12 insertions, 2 deletions

diff --git a/internal/rosa/cmake.go b/internal/rosa/cmake.go
index 8cfbf00c..2095c47a 100644
--- a/internal/rosa/cmake.go
+++ b/internal/rosa/cmake.go
@@ -7,6 +7,8 @@ import (
 )
 
 var (
+	_cmakeEarly = H("cmake-early")
+
 	_cmake = H("cmake")
 	_ninja = H("ninja")
 )
@@ -16,6 +18,9 @@ type CMakeHelper struct {
 	// Path elements joined with source.
 	Append []string
 
+	// Use the bootstrap minimal [MakeHelper] CMake.
+	Early bool
+
 	// Value of CMAKE_BUILD_TYPE. The zero value is equivalent to "Release".
 	BuildType string
 	// CMake CACHE entries.
@@ -36,10 +41,15 @@ var _ Helper = new(CMakeHelper)
 
 // tools returns the cmake handle alongside either ninja or make.
 func (attr *CMakeHelper) tools(Toolchain) P {
+	h := _cmake
+	if attr != nil && attr.Early {
+		h = _cmakeEarly
+	}
+
 	if attr != nil && attr.Make {
-		return P{_cmake, _make}
+		return P{h, _make}
 	}
-	return P{_cmake, _ninja}
+	return P{h, _ninja}
 }
 
 // inputs is a noop.