Introduce NOTSHLIBLDFLAGS, used to link executables only

This can be used for LDFLAGS that would be inappropriate for shared
libraries, such as the "-fPIE -pie" used to link position-independent
executables. PIEs make it more difficult to exploit various classes
of security vulnerability.

MP/Makefile

@@ -2170,7 +2170,7 @@ endif
 ifneq ($(USE_RENDERER_DLOPEN),0)
 $(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(LIBS)
 
@@ -2186,13 +2186,13 @@ $(B)/renderer_mp_rend2_$(SHLIBNAME): $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTO
 else
 $(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(Q3ROBJ) $(JPGOBJ) $(FTOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3ROBJ) $(JPGOBJ) $(FTOBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
 
 $(B)/$(CLIENTBIN)_rend2$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTOBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
 endif
@@ -2341,7 +2341,7 @@ endif
 
 $(B)/$(SERVERBIN)$(FULLBINEXT): $(Q3DOBJ)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(Q3DOBJ) $(LIBS)
+	$(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) -o $@ $(Q3DOBJ) $(LIBS)
 
 
 

SP/Makefile

@@ -2141,7 +2141,7 @@ endif
 ifneq ($(USE_RENDERER_DLOPEN),0)
 $(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(LIBS)
 
@@ -2157,13 +2157,13 @@ $(B)/renderer_sp_rend2_$(SHLIBNAME): $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTO
 else
 $(B)/$(CLIENTBIN)$(FULLBINEXT): $(Q3OBJ) $(Q3ROBJ) $(JPGOBJ) $(FTOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3ROBJ) $(JPGOBJ) $(FTOBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
 
 $(B)/$(CLIENTBIN)_rend2$(FULLBINEXT): $(Q3OBJ) $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTOBJ) $(LIBSDLMAIN)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) \
+	$(Q)$(CXX) $(CLIENT_CFLAGS) $(CFLAGS) $(CLIENT_LDFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) \
 		-o $@ $(Q3OBJ) $(Q3R2OBJ) $(Q3R2STRINGOBJ) $(JPGOBJ) $(FTOBJ) \
 		$(LIBSDLMAIN) $(CLIENT_LIBS) $(RENDERER_LIBS) $(LIBS)
 endif
@@ -2308,7 +2308,7 @@ endif
 
 $(B)/$(SERVERBIN)$(FULLBINEXT): $(Q3DOBJ)
 	$(echo_cmd) "LD $@"
-	$(Q)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $(Q3DOBJ) $(LIBS)
+	$(Q)$(CC) $(CFLAGS) $(LDFLAGS) $(NOTSHLIBLDFLAGS) -o $@ $(Q3DOBJ) $(LIBS)