- Issue #15591: Fix parsing MAKEFLAGS in the sharedmods target.

diff --cc Makefile.pre.in
index f715711d9e328156603fe8e87864e43826bfa52d,62db9c1374aec3934cad019fbc45427dc1269798..9f5e2a14efc93adb56b677457403b84930fec33b
--- 1/Makefile.pre.in
--- 2/Makefile.pre.in
+++ b/Makefile.pre.in
@@@ -466,18 -430,20 +466,23 @@@ coverage
  $(BUILDPYTHON):       Modules/python.o $(LIBRARY) $(LDLIBRARY) $(PY3LIBRARY)
        $(LINKCC) $(PY_LDFLAGS) $(LINKFORSHARED) -o $@ Modules/python.o $(BLDLIBRARY) $(LIBS) $(MODLIBS) $(SYSLIBS) $(LDLAST)
  
 -platform: $(BUILDPYTHON)
 -      $(RUNSHARED) ./$(BUILDPYTHON) -E -c 'import sys ; from sysconfig import get_platform ; print(get_platform()+"-"+sys.version[0:3])' >platform
 +platform: $(BUILDPYTHON) $(SYSCONFIGDATA)
 +      $(RUNSHARED) $(PYTHON_FOR_BUILD) -c 'import sys ; from sysconfig import get_platform ; print(get_platform()+"-"+sys.version[0:3])' >platform
  
 +# Generate the sysconfig build-time data
 +$(SYSCONFIGDATA): $(BUILDPYTHON)
 +      $(RUNSHARED) $(PYTHON_FOR_BUILD) -S -m sysconfig --generate-posix-vars
  
  # Build the shared modules
 -sharedmods: $(BUILDPYTHON)
 +sharedmods: $(BUILDPYTHON) $(SYSCONFIGDATA)
-       case $$MAKEFLAGS in *s*) quiet=-q; esac; \
+         if which getopt >/dev/null; then \
+         mflags=`getopt s $$MAKEFLAGS 2>/dev/null | sed 's/ --.*/ /'`; \
+       else \
+         mflags=" $$MAKEFLAGS "; \
+       fi; \
+       case $$mflags in "* -s *") quiet=-q; esac; \
        $(RUNSHARED) CC='$(CC)' LDSHARED='$(BLDSHARED)' OPT='$(OPT)' \
 -              ./$(BUILDPYTHON) -E $(srcdir)/setup.py $$quiet build
 +              $(PYTHON_FOR_BUILD) $(srcdir)/setup.py $$quiet build
  
  # Build static library
  # avoid long command lines, same as LIBRARY_OBJS