gcc引用非標準函式庫(gcc -l -L)

gcc引用非標準函式庫要求正確的引用順序
格式:
gcc [source code: .c, .o, .a] [ -l | -L ]
Example:

gcc sin.c -lm -L/usr/lib -I/usr/include

Try:

gcc $(CFLAGS) -o xxx xxx.o ../../dbus/libdbus.a  = O OK 

gcc $(CFLAGS) -ldbus -L../../dbus -o xxx xxx.o  = X FAIL

gcc $(CFLAGS) -ldbus -L../../dbus -o xxx xxx.o  = X FAIL

gcc $(CFLAGS) -o xxx xxx.o -ldbus -L../../dbus  = O OK 

gcc $(CFLAGS) -o xxx xxx.o -L../../dbus  = X FAIL

gcc $(CFLAGS) -o xxx xxx.o -L../../dbus -ldbus  = O OK