ci: cache libiconv

Author: krichprollsch

.github/actions/install/action.yml

@@ -67,9 +67,19 @@ runs:
         mkdir -p v8/out/${{ inputs.os }}/release/obj/zig/
         ln -s ${{ inputs.cache-dir }}/v8/libc_v8.a v8/out/${{ inputs.os }}/release/obj/zig/libc_v8.a
 
+    - name: Cache libiconv
+      id: cache-libiconv
+      uses: actions/cache@v4
+      env:
+        cache-name: cache-libiconv
+      with:
+        path: ${{ inputs.cache-dir }}/libiconv
+        key: vendor/libiconv/libiconv-1.17
+
     - name: libiconv
+      if: ${{ steps.cache-libiconv.outputs.cache-hit != 'true' }}
       shell: bash
-      run: make install-libiconv
+      run: make build-libiconv
 
     - name: build mimalloc
       shell: bash

Makefile

@@ -202,11 +202,13 @@ ifeq ("$(wildcard vendor/libiconv/libiconv-1.17)","")
 	curl https://ftp.gnu.org/pub/gnu/libiconv/libiconv-1.17.tar.gz | tar -xvzf -
 endif
 
-install-libiconv: download-libiconv clean-libiconv
+build-libiconv: clean-libiconv
 	@cd vendor/libiconv/libiconv-1.17 && \
 	./configure --prefix=$(ICONV) --enable-static && \
 	make && make install
 
+install-libiconv: download-libiconv build-libiconv
+
 clean-libiconv:
 ifneq ("$(wildcard vendor/libiconv/libiconv-1.17/Makefile)","")
 	@cd vendor/libiconv/libiconv-1.17 && \