Build and install libpython3.so.

Makefile.pre.in

@@ -166,6 +166,7 @@ DIST=		$(DISTFILES) $(DISTDIRS)
 LIBRARY=	@LIBRARY@
 LDLIBRARY=      @LDLIBRARY@
 BLDLIBRARY=     @BLDLIBRARY@
+PY3LIBRARY=     @PY3LIBRARY@
 DLLLIBRARY=	@DLLLIBRARY@
 LDLIBRARYDIR=   @LDLIBRARYDIR@
 INSTSONAME=	@INSTSONAME@
@@ -420,7 +421,7 @@ coverage:
 
 
 # Build the interpreter
-$(BUILDPYTHON):	Modules/python.o $(LIBRARY) $(LDLIBRARY)
+$(BUILDPYTHON):	Modules/python.o $(LIBRARY) $(LDLIBRARY) $(PY3LIBRARY)
 	$(LINKCC) $(PY_LDFLAGS) $(LINKFORSHARED) -o $@ Modules/python.o $(BLDLIBRARY) $(LIBS) $(MODLIBS) $(SYSLIBS) $(LDLAST)
 
 platform: $(BUILDPYTHON)
@@ -454,6 +455,9 @@ libpython$(LDVERSION).so: $(LIBRARY_OBJS)
 		$(BLDSHARED) -o $@ $(LIBRARY_OBJS) $(MODLIBS) $(SHLIBS) $(LIBC) $(LIBM) $(LDLAST); \
 	fi
 
+libpython3.so:	libpython$(LDVERSION).so
+	$(BLDSHARED) -o $@ -Wl,-hl$@ $^
+
 libpython$(VERSION).dylib: $(LIBRARY_OBJS)
 	 $(CC) -dynamiclib -Wl,-single_module $(PY_LDFLAGS) -undefined dynamic_lookup -Wl,-install_name,$(prefix)/lib/libpython$(VERSION).dylib -Wl,-compatibility_version,$(VERSION) -Wl,-current_version,$(VERSION) -o $@ $(LIBRARY_OBJS) $(SHLIBS) $(LIBC) $(LIBM) $(LDLAST); \
 
@@ -851,6 +855,9 @@ altbininstall: $(BUILDPYTHON)
 				(cd $(DESTDIR)$(LIBDIR); $(LN) -sf $(INSTSONAME) $(LDLIBRARY)) \
 			fi \
 		fi; \
+		if test -n "$(PY3LIBRARY)"; then \
+			$(INSTALL_SHARED) $(PY3LIBRARY) $(DESTDIR)$(LIBDIR)/$(PY3LIBRARY); \
+		fi; \
 	else	true; \
 	fi
 

configure

@@ -647,6 +647,7 @@ LDVERSION
 RUNSHARED
 INSTSONAME
 LDLIBRARYDIR
+PY3LIBRARY
 BLDLIBRARY
 DLLLIBRARY
 LDLIBRARY
@@ -4710,6 +4711,7 @@ $as_echo "$LIBRARY" >&6; }
 
 
 
+
 LDLIBRARY="$LIBRARY"
 BLDLIBRARY='$(LDLIBRARY)'
 INSTSONAME='$(LDLIBRARY)'
@@ -4906,6 +4908,10 @@ $as_echo "#define Py_ENABLE_SHARED 1" >>confdefs.h
 	  BLDLIBRARY='-Wl,-R,$(LIBDIR) -L. -lpython$(LDVERSION)'
 	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
+	  if test $with_pydebug == no
+	  then
+	      PY3LIBRARY=libpython3.so
+	  fi
           ;;
     Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*)
 	  LDLIBRARY='libpython$(LDVERSION).so'
@@ -4917,6 +4923,11 @@ $as_echo "#define Py_ENABLE_SHARED 1" >>confdefs.h
 		;;
 	  esac
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
+	  PY3LIBRARY=libpython3.so
+	  if test $with_pydebug == no
+          then
+	      PY3LIBRARY=libpython3.so
+	  fi
 	  ;;
     hp*|HP*)
 	  case `uname -m` in

configure.in

@@ -608,6 +608,7 @@ AC_MSG_RESULT($LIBRARY)
 AC_SUBST(LDLIBRARY)
 AC_SUBST(DLLLIBRARY)
 AC_SUBST(BLDLIBRARY)
+AC_SUBST(PY3LIBRARY)
 AC_SUBST(LDLIBRARYDIR)
 AC_SUBST(INSTSONAME)
 AC_SUBST(RUNSHARED)
@@ -737,6 +738,10 @@ if test $enable_shared = "yes"; then
 	  BLDLIBRARY='-Wl,-R,$(LIBDIR) -L. -lpython$(LDVERSION)'
 	  RUNSHARED=LD_LIBRARY_PATH=`pwd`:${LD_LIBRARY_PATH}
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
+	  if test $with_pydebug == no
+	  then
+	      PY3LIBRARY=libpython3.so
+	  fi
           ;;
     Linux*|GNU*|NetBSD*|FreeBSD*|DragonFly*)
 	  LDLIBRARY='libpython$(LDVERSION).so'
@@ -748,6 +753,11 @@ if test $enable_shared = "yes"; then
 		;;
 	  esac
 	  INSTSONAME="$LDLIBRARY".$SOVERSION
+	  PY3LIBRARY=libpython3.so
+	  if test $with_pydebug == no
+          then
+	      PY3LIBRARY=libpython3.so
+	  fi
 	  ;;
     hp*|HP*)
 	  case `uname -m` in

pyconfig.h.in

@@ -497,6 +497,9 @@
 /* Define to 1 if you have the `pause' function. */
 #undef HAVE_PAUSE
 
+/* Define if the OS supports pipe2() */
+#undef HAVE_PIPE2
+
 /* Define to 1 if you have the `plock' function. */
 #undef HAVE_PLOCK