More complex makefile with the LDS script programming

First look at a makefile Example:

1 /*identify the toolchain and take a simple alias for it*/2CC = arm-linux-GCC  3LD = arm-linux-LD4AR = arm-linux-ar5Objcopy = arm-linux-objcopy6OBJDUMP = arm-linux-Objdump7 /*indicates the location of the header file*/8Includedir: = $ (shellpwd)/include9 /*-wall hint Warning,-O2 represents optimization options, optimal optimization,-fno-builtin represents itself to implement some library functions, if not added this option will conflict*/TenCFLAGS: =-wall-o2-fno-Builtin One /*-nostdinc,-nostdlib means that the two libraries are not used, and-i$ (includedir) means linking to the header file*/ ACppflags: =-nostdinc-i$ (Includedir)-nostdlib -  - /*make these defined variables effective*/ the export CC AR LD objcopy OBJDUMP includedir CFLAGS cppflags -  - /** Compile the. o file and the. A static library generated under the lib/directory together into an. elf file*/ -OBJS: = START.O main.o uart.o clock.o lcd.o lib/LIBC.A +  - Lcd70.bin: $ (OBJS) +${LD}-tlcd70.lds-o lcd70.elf $^//The main place used here is the location of the code indicated by Tlcd70.lds, the linker script.  A${objcopy}-o binary-S lcd70.elf [email protected] at${objdump}-D lcd70.elf >Lcd70.dis -  - /*indicates pseudo-target, i.e. no dependent file*/ -. phony:lib/LIBC.A - /*go to the directory to execute make command production. A static library*/ -lib/LIBC.A: inCD Lib; Make; cd.. -      to%.o:%. C +${CC} $ (cppflags) $ (CFLAGS)-c-o [email protected] $< -  the%.o:%. S *${CC} $ (cppflags) $ (CFLAGS)-c-o [email protected] $< $ Panax Notoginseng Clean : -      MakeClean-C Lib the     RM-F *.bin *.elf *.dis *.O

Makefile for production of static libraries :

string . O VSPRINTF.O /* production of static libraries */ LIBC.A: $ (OBJS)     -r-o [email protected] $^ /* generates. o files for. C and. s files */%.o:%. C    -c-o [email protected ] $<%.o:%. S    -c-o [email protected] $< clean:    rm -F LIBC.A *.o    

Linker script:

sections{    0x40000000;  // indicates the start run address of the program     . Text: {        START.O// indicates the first file to run        * (. Text)    }    . Data: {        * (. data)    }    . BSS: {        * (. BSS)    }    }

　　

More complex makefile with the LDS script programming