Using pkg-config to fix compiling in some cases

src/transport/Makefile

@@ -5,8 +5,9 @@ LIBDIR	= $(PREFIX)/lib
 CC	= cc
 CPPFLAGSF= -I ../../include
 CPPFLAGS=
-CFLAGSF	= -W -fPIC
+CFLAGSF	= -W -fPIC `pkg-config --cflags libSystem`
 CFLAGS	= -Wall -g -O2 -pedantic
+LDFLAGSF= `pkg-config --cflags libSystem`
 AR	= ar
 RANLIB	= ranlib
 CCSHARED= $(CC) -shared

src/transport/project.conf

@@ -1,8 +1,9 @@
 targets=tcp,tcp4,tcp6,template,udp,udp4,udp6
 cppflags_force=-I ../../include
 cppflags=
-cflags_force=-W -fPIC
+cflags_force=-W -fPIC `pkg-config --cflags libSystem`
 cflags=-Wall -g -O2 -pedantic
+ldflags_force=`pkg-config --cflags libSystem`
 dist=Makefile
 
 [tcp]