Makefile common functions notdir, wildcard, patsubst

Hello everyone , I meet you again , I'm your friend, Quan Jun .

notdir,wildcard and patsubst yes makefile Several useful functions in , I haven't noticed before makefile Usage of functions in , Take a look today ~

1、makefile The function in

makefile Function use in , It is similar to taking the value of a variable , It's with a ‘$’ Start , Then there is a parenthesis, which is the function name and the required parameter list , Multiple variables are separated by commas , like this

return = $(functionname arg1,arg2,arg3…).

Maybe here ’$’ It's more like taking a value from an address .

2、 wildcard

Use ：SRC = $(wildcard *.c ./foo/*.c)

Search the current directory and ./foo/ All to .c Final document , Generate a list of file names separated by spaces , And assign it to SRC. The current directory file only has a file name , The file name under the subdirectory contains path information , such as ./foor/bar.c.

3、notdir

Use ：SRC = $(notdir wildcard)

Remove all directory information ,SRC The list of file names in will only have file names .

4、patsubst

Use ：OBJ = (patsubst %.o %.c (SRC))

patsubst yes patten substitude Abbreviation , The meaning of matching substitution . This sentence is in SRC Find everything in .c Final document , And then put all the .c Switch to .o.

Legendary omnipotence makefile

########################################################### 

#　Generic　makefile　 

#　 

#　by　George　Foot　 

#　email:　[email protected]　 

#　 

#　Copyright　(c)　

1997　George　Foot　 

#　All　rights　reserved.　 

#　 All rights reserved 　 

#　 

#　No　warranty,　no　liability;　 

#　you　use　

this　at　your　own　risk.　 

#　 No insurance , Not responsible for 　 

#　 You need this , At your own risk 　 

#　 

#　You　are　free　to　modify　and　 

#　distribute　

this　without　giving　 

#　credit　to　the　original　author.　 

#　 You can change and distribute this file at will 　 

#　 There is no need to honor the original author .　 

#　（ What do you mean ？）　 

#　 

###################################### 

###　Customising 

# 

#　Adjust　the　following　

if　necessary;　EXECUTABLE　

is　the　target 

#　executable

‘

s　filename,　and　LIBS　is　a　list　of　libraries　to　link　in 

#　(e.g.　alleg,　stdcx,　iostr,　etc).　You　can　

override　these　on　make

‘

s 

#　command　line　of　course,　

if　you　prefer　to　

do　it　that　way. 

#　 

#　 if necessary , Adjust the following things .　EXECUTABLE　 Is the executable name of the target ,　LIBS 

#　 Is a list of packages that need to be connected （ for example 　alleg,　stdcx,　iostr　 wait ）. Of course you  

#　 Can be in 　make　 Command line overrides them , It's no problem if you like . 

#　 

EXECUTABLE　:=　mushroom.exe 

LIBS　:=　alleg 

#　Now　alter　any　

implicit　rules

‘

　variables　if　you　like,　e.g.: 

# 

#　 Now change the variables in any implicit rules you want to change , for example  

CFLAGS　:=　-g　-Wall　-O3　-m486 

CXXFLAGS　:=　$(CFLAGS) 

#　The　next　bit　checks　to　see　whether　rm　

is

in　your　djgpp　bin 

#　directory;　

if　not　it　uses　del　instead,　but　

this　can　cause　(harmless) 

#　`File　not　found

‘

　error　messages.　If　you　are　not　using　DOS　at　all, 

#　

set　the　variable　to　something　which　will　unquestioningly　remove 

#　files. 

# 

#　 Now check your 　djgpp　 Is there... Under the command directory 　rm　 command , If not , We use  

#　del　 Order instead of , But it may give us 　

‘

File　not　found

‘　 This error message , This is not  

#　 What a big problem . If you don't use 　DOS　, Set it as a command to delete files without nonsense . 

#　（ In fact, this step is 　UNIX　 Class is redundant , It's just convenient 　DOS　 Users .　UNIX 

#　 Users can delete this ５ Line command .） 

ifneq　($(wildcard　$(DJDIR)/bin/rm.exe),) 

RM-F　:=　rm　-f 

else

RM-F　:=　del 

endif 

#　You　shouldn

‘

t　need　to　change　anything　below　this　point. 

# 

#　 Start here , You should not need to change anything .（ I don't quite believe , too ＮＢ 了 ！） 

SOURCE　:=　$(wildcard　*.c)　$(wildcard　*.cc) 

OBJS　:=　$(patsubst　%.c,%.o,$(patsubst　%.cc,%.o,$(SOURCE))) 

DEPS　:=　$(patsubst　%.o,%.d,$(OBJS)) 

MISSING_DEPS　:=　$(filter-

out　$(wildcard　$(DEPS)),$(DEPS)) 

MISSING_DEPS_SOURCES　:=　$(wildcard　$(patsubst　%.d,%.c,$(MISSING_DEPS))　\ 

$(patsubst　%.d,%.cc,$(MISSING_DEPS))) 

CPPFLAGS　+=　-MD 

.PHONY　:　everything　deps　objs　clean　veryclean　rebuild 

everything　:　$(EXECUTABLE) 

deps　:　$(DEPS) 

objs　:　$(OBJS) 

clean　: 

　　@$(RM-F)　*.o 

　　@$(RM-F)　*.d 

veryclean:　clean 

　　@$(RM-F)　$(EXECUTABLE) 

rebuild:　veryclean　everything 

ifneq　($(MISSING_DEPS),) 

$(MISSING_DEPS)　: 

　　@$(RM-F)　$(patsubst　%.d,%.o,[email protected]) 

endif 

-include　$(DEPS) 

$(EXECUTABLE)　:　$(OBJS) 

　　gcc　-o　$(EXECUTABLE)　$(OBJS)　$(addprefix　-l,$(LIBS)) 

###

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