diff -Naru LoopTools-2.16.orig/makefile.in LoopTools-2.16/makefile.in
--- LoopTools-2.16.orig/makefile.in	2022-04-12 11:04:39.286039581 +0200
+++ LoopTools-2.16/makefile.in	2022-04-12 11:07:50.023602000 +0200
@@ -1,8 +1,8 @@
 BLD = build$(QUADSUFFIX)
 
-LIBDIR = $(PREFIX)/lib$(LIBDIRSUFFIX)
-INCLUDEDIR = $(PREFIX)/include
-BINDIR = $(PREFIX)/bin
+LIBDIR = $(DESTDIR)/$(PREFIX)/lib$(LIBDIRSUFFIX)
+INCLUDEDIR = $(DESTDIR)/$(PREFIX)/include
+BINDIR = $(DESTDIR)/$(PREFIX)/bin
 
 LIB = libooptools$(QUADSUFFIX).a
 FE = lt$(QUADSUFFIX)$(EXE)
@@ -11,6 +11,10 @@
 FXX = f++$(QUADSUFFIX)
 INCLUDE = $(BLD)/looptools.h $(BLD)/clooptools.h
 
+LIBRARY=libooptools.so
+REALNAME=$(LIBRARY)
+
+
 ARGS = $(PARALLEL) \
   LIB="$(LIB)" \
   FE="$(FE)" \
@@ -20,14 +24,14 @@
   EXE="$(EXE)" \
   DEF="$(DEF)" \
   NOUNDERSCORE="$(NOUNDERSCORE)" \
-  XFC="$(FC) $(FFLAGS) -I." \
+  XFC="$(FC) $(FFLAGS) -I. -fPIC" \
   F90="$(F90)" \
   CDEFS="$(CDEFS)" \
   MCDEFS="$(MCDEFS)" \
   CC="$(CC)" \
-  CFLAGS="$(CFLAGS)" \
+  CFLAGS="$(CFLAGS) -fPIC" \
   CXX="$(CXX)" \
-  CXXFLAGS="$(CXXFLAGS)" \
+  CXXFLAGS="$(CXXFLAGS) -fPIC" \
   ML="$(ML)" \
   MCC="$(MCC)" \
   MCFLAGS="$(MCFLAGS)" \
@@ -37,24 +41,23 @@
   NM="$(NM)" \
   DLLTOOL="$(DLLTOOL)" \
   LDFLAGS="$(LDFLAGS)" \
-  LIBPATH="$(LIBPATH)"
+  LIBPATH="$(LIBPATH)" \
+  REALNAME="$(REALNAME)"
 
 
-default all lib frontend mma: force
+default all lib solib frontend mma: force
 	cd $(BLD) && $(MAKE) $(ARGS) $@
 
-install: lib frontend
-	-mkdir $(PREFIX)
+install: lib solib frontend
+	-mkdir $(DESTDIR)/$(PREFIX)
 	-mkdir $(LIBDIR) $(BINDIR) $(INCLUDEDIR)
 	cp -p $(BLD)/$(LIB) $(LIBDIR)
 	cp -p $(INCLUDE) $(INCLUDEDIR)
-	strip $(BLD)/$(FE)
 	cp -p $(BLD)/$(FCC) $(BLD)/$(FE) $(BINDIR)
 	rm -f $(BINDIR)/$(FXX)
 	ln -s $(FCC) $(BINDIR)/$(FXX)
 	test ! -f $(BLD)/$(MFE) || { \
 	  test -z "$(EXE)" || ldd $(BLD)/$(MFE) | awk '/\/usr\/bin\/cyg/ { system("cp -p " $$3 " $(BINDIR)/"); }' ; \
-	  strip $(BLD)/$(MFE) ; \
 	  cp -p $(BLD)/$(MFE) $(BINDIR); \
 	}
 
diff -Naru LoopTools-2.16.orig/src/makefile LoopTools-2.16/src/makefile
--- LoopTools-2.16.orig/src/makefile	2022-04-12 11:04:39.287039595 +0200
+++ LoopTools-2.16/src/makefile	2022-04-12 11:09:14.079731941 +0200
@@ -1,6 +1,6 @@
-default: frontend mma$(ML)
+default: frontend mma$(ML) solib
 
-all: frontend mma1
+all: frontend mma1 solib
 
 frontend: lib $(FE)
 
@@ -8,6 +8,8 @@
 
 mma0 lib: $(LIB) clooptools.h $(FCC)
 
+solib: $(REALNAME) fcc
+
 
 .SUFFIXES:
 
@@ -240,6 +242,9 @@
 	$(AR) $(ARFLAGS) $(LIB) $?
 	-$(RANLIB) $(LIB)
 
+$(REALNAME): $(OBJS)
+	$(XFC) $(LDFLAGS) -shared -Wl,--soname,$(REALNAME) -o $@ $?
+
 
 $(FE): lt.F $(LTINC) $(LIB)
 	$(XFC) -o $(FE) lt.F $(LIB) $(LDFLAGS)