Mike - EMAIL IGNORED wrote: > On Fedora Core 4, I have some C++ code developed > that I keep in a library. Until recently, I used > ar to generate a libXXX.a . Now I have changed to: > > TARGET = libXXX.so > CPPFLAGS = -fPIC -DPIC -O3 -I. > > $(TARGET): $(OBJ) > gcc -shared $(CPPFLAGS) -o $(TARGET) $(OBJ) > > to create libXXX.so , and I noticed that some > executables dropped in size by about a factor > of 10. Good. > > Now some of the code in my library depends on > the realtime and openssl libraries so when > utilizing these, I have always used: > > -l rt -l ssl > > in my link lines. But for code that did not depend > on these capabilities, the corresponding -l were > not required. > > Now, on the contrary, find that these -l designations > are required WHETHER OR NOT these capabilities are > needed in the application. Otherwise I get unresolved > names. > > Is this to be expected with shared libraries? Is > there something I could do to my shared library to > prevent it? Avoid unresolved symbols in your shared library. Instead of linking -lrt -lssl in your apps, add -lrt -lssl when creating the library, ie, instead of gcc -shared $(CPPFLAGS) -o $(TARGET) $(OBJ) do gcc -shared $(CPPFLAGS) -o $(TARGET) $(OBJ) -lrt -lssl -- Rex
