gnu-make

I have a problem with order-only prerequisites. These do not execute first at all. Am I mis-understanding the way order-only prerequisites work? The following make script: .PHONY: mefirst mefirst2 mefirst: @echo "I'm first!" mefirst2: @echo "I'm first too!" normaltarget: normaltarget2 | mefirst2 @echo "normaltarget done" normaltarget2: a b c @echo "normaltarget2 done" helloworld: normaltarget | mefirst @echo "helloworld done" .DEFAULT_GOAL := go go: helloworld @echo "go done" a: @echo a b: @echo b c: @echo c ...prints out the following: a b c normaltarget2 done I'm first too! normaltarget done

So I have this Makefile based build system that my users feel is working too slowly. For the sake of this question lets define performance as the time it takes make to figure out what it should actually do. I can see some avenues for optimization -- Reducing the number of times Makefile is parsed and the DAG recalculated due to including a Makefile fragment. Reducing the number of going to an external Makefile with make -C Reducing variable expansions etc. -- however I want to know first where are my bottlenecks. Since optimization without profiling is a waste of life, I want to ask: How to

I'm trying to specify rpath in my binary. My makefile looks like this- CC=gcc CFLAGS=-Wall LDFLAGS= -rpath='../libs/' main: main.c gcc -o main main.c clean: rm -f main main.o But when I query rpath using command readelf -a ./main | grep rpath I get nothing I've tried specifying rpath as LDFLAGS= "-rpath=../libs/" but even that doesn't seem to work. Can someone please post an example on how should I specify rpath in a makefile? GCC and ld versions are- gcc (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2 GNU ld (GNU Binutils for Ubuntu) 2.21.0.20110327 If you set the variables, you should probably use them

I have a makefile, which includes several other makefiles, which in turn all add to a variable like this: VAR := Something SomethingElse VAR += SomeOtherThing (...) Now I wish to remove SomethingElse from the VAR variable. What do I put in place of (...) to do this? I am using GNU Make, and a GNU Make specific solution will be fine. Mat You could use the filter-out text function if you're using GNU Make. OTHERVAR := $(filter-out SomethingElse,$(VAR)) On top of the correct answer above: VAR = bla1 bla2 bla3 bla4 bla5 TMPVAR := $(VAR) VAR = $(filter-out bla3, $(TMPVAR)) all: @echo "VAR is: $(VAR

Possible Duplicate: Make error: missing separator Have this code in makefile: PROG = semsearch all: $(PROG) %: %.c gcc -o $@ $< -lpthread clean: rm $(PROG) and the error missing separator. stop. Can someone help me? You need to precede the lines starting with gcc and rm with a hard tab. Commands in make rules are required to start with a tab (unless they follow a semicolon on the same line). The result should look like this: PROG = semsearch all: $(PROG) %: %.c gcc -o $@ $< -lpthread clean: rm $(PROG) Note that some editors may be configured to insert a sequence of spaces instead of a hard tab

I installed MinGW and MSYS, added C:\MinGW\bin to PATH but I still can't run Makefile on Windows' cmd . I would like to run cmd.exe and there type, for example, make all but my cmd says that there is no such command. What should I do? I don't want to use MSYS shell, that's not the point. Any ideas how to use GNU Make in Windows cmd as I can do it in Ubuntu? I'm not interested in Cygwin . Here's how I got it to work: copy c:\MinGW\bin\mingw32-make.exe c:\MinGW\bin\make.exe Then I am able to open a command prompt and type make: C:\Users\Dell>make make: *** No targets specified and no makefile

I have the following makefile for my project, and I'd like to configure it for release and debug builds. In my code, I have lots of #ifdef DEBUG macros in place, so it's simply a matter of setting this macro and adding the -g3 -gdwarf2 flags to the compilers. How can I do this? $(CC) = g++ -g3 -gdwarf2 $(cc) = gcc -g3 -gdwarf2 all: executable executable: CommandParser.tab.o CommandParser.yy.o Command.o g++ -g -o output CommandParser.yy.o CommandParser.tab.o Command.o -lfl CommandParser.yy.o: CommandParser.l flex -o CommandParser.yy.c CommandParser.l gcc -g -c CommandParser.yy.c CommandParser