Test parallel make

Author: jeroen

.github/workflows/R-CMD-check.yaml

@@ -22,8 +22,10 @@ jobs:
           - {os: windows-latest, r: '4.3', FORCE_STATIC_GIFSKI: 'static'}
           - {os: windows-latest, r: 'release'}
           - {os: windows-latest, r: 'release', FORCE_STATIC_GIFSKI: 'static'}
+          - {os: windows-latest, r: 'devel'}
           - {os: macOS-13, r: 'release'}
           - {os: macOS-14, r: 'release'}
+          - {os: macOS-15, r: 'next'}
           - {os: ubuntu-latest,   r: 'devel', http-user-agent: 'release'}
           - {os: ubuntu-24.04,    r: 'release'}
           - {os: ubuntu-22.04,    r: 'release'}
@@ -59,3 +61,4 @@ jobs:
           upload-results: true
         env:
           FORCE_STATIC_GIFSKI: ${{ matrix.config.FORCE_STATIC_GIFSKI }}
+          MAKEFLAGS: -j4

cleanup.win

@@ -0,0 +1 @@
+cleanup

src/Makevars.ucrt

@@ -14,4 +14,4 @@ $(STATLIB):
 	rm -Rf $(LIBDIR)/build
 
 cleanup: $(SHLIB)
-	rm -Rf $(STATLIB) myrustlib/target
+	@rm -Rf $(STATLIB) myrustlib/target

src/Makevars.win

@@ -9,10 +9,12 @@ PKG_LIBS = -L$(RWINLIB)/lib \
 	-L$(RWINLIB)/lib$(R_ARCH) \
 	-lgifski -lws2_32 -ladvapi32 -luserenv -ldbghelp -lbcrypt $(NTDLL)
 
-all: clean winlibs
+all: $(SHLIB) cleanup
+
+$(OBJECTS): winlibs
 
 winlibs:
 	"${R_HOME}/bin${R_ARCH_BIN}/Rscript.exe" "../tools/winlibs.R"
 
-clean:
-	rm -f $(SHLIB) $(OBJECTS)
+cleanup: $(SHLIB)
+	@rm -Rf $(RWINLIB)