gh-138489: Add missing build-details.json step for building wasm (#139302)

* fix: add missing `build-details.json` step for building wasm

Signed-off-by: Ho Kim <ho.kim@ulagbulag.io>

* gh-138489: Add missing build-details.json step for building wasm

Signed-off-by: Ho Kim <ho.kim@ulagbulag.io>

* Update Makefile.pre.in

Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

---------

Signed-off-by: Ho Kim <ho.kim@ulagbulag.io>
Co-authored-by: Adam Turner <9087854+AA-Turner@users.noreply.github.com>

Author: HoKim98

Makefile.pre.in

@@ -801,7 +801,7 @@ build_all:	check-clean-src check-app-store-compliance $(BUILDPYTHON) platform sh
 
 .PHONY: build_wasm
 build_wasm: check-clean-src $(BUILDPYTHON) platform sharedmods \
-		python-config checksharedmods
+		python-config checksharedmods build-details.json
 
 .PHONY: build_emscripten
 build_emscripten: build_wasm web_example web_example_pyrepl_jspi

Misc/NEWS.d/next/Build/2025-09-24-13-59-26.gh-issue-138489.1AcuZM.rst

@@ -0,0 +1,6 @@
+When cross-compiling for WASI by ``build_wasm`` or ``build_emscripten``, the
+``build-details.json`` step is now included in the build process, just like
+with native builds.
+
+This fixes the ``libinstall`` task which requires the ``build-details.json``
+file during the process.