The document discusses what a Makefile is and why it is useful to use one. A Makefile defines dependencies between source files and specifies the build process or commands that are executed to build targets. It allows automating compiling and building projects by running make commands. Key benefits mentioned are that it saves time and makes the build process easier by handling dependencies and only rebuilding what is necessary.

1. MAKEFILEMAKEFILE
co to je?
proč používat makefile?
jak ho používáme?
(na co si dát pozor?)

2. CO TO JE?CO TO JE?
soubor, který:
určuje postup utility make při překladu a
definuje závislosti mezi zdrojovými soubory
CC=gcc
CFLAGS=-I.
DEPS = hellomake.h
%.o: %.c $(DEPS)
$(CC) -c -o $@ $< $(CFLAGS)
hellomake: hellomake.o hellofunc.o
$(CC) -o hellomake hellomake.o hellofunc.o

3. CO TO JE MAKE?CO TO JE MAKE?
Program make je utilita pro automatizaci překladu
zdrojových kódů do binárních souborů
https://cs.wikipedia.org/wiki/Make

4. PROČ MAKEFILE?PROČ MAKEFILE?
protože jsme líní

5. SYNTAXESYNTAXE
target1: dependency1 [...]
command1
command2
...
target2: ...

7. HELLO WORLDHELLO WORLD
...
hello:
echo "Hello world!"
$ make hello
echo "Hello world!"
Hello world!

8. TATO PREZENTACETATO PREZENTACE
...
reveal: ## reveal-md presentation
@/home/ikar/ctvrtkon/node_modules/.bin/reveal-md
--host 0.0.0.0
--watch
--theme white
--port 2019
README.md
$ make reveal
Reveal-server started at http://0.0.0.0:2019

9. REÁLNÝ PROJEKTREÁLNÝ PROJEKT

10. BAREVNÁ NÁPOVĚDABAREVNÁ NÁPOVĚDA
...
help: ## list available targets (this page)
@awk 'BEGIN {FS = ":.*?## "} /^[0-9a-zA-Z_-]+:.*?## /
{printf "033[36m%-30s033[0m %sn", $$1, $$2}'
$(MAKEFILE_LIST)
reveal: ## reveal-md presentation
...

11. BAREVNÁ NÁPOVĚDABAREVNÁ NÁPOVĚDA

12. PROČ MAKEFILE?PROČ MAKEFILE?
protože jsme líní ✓
protože chceme ušetřit čas

14. SYNTAXESYNTAXE
target1: dependency1 [...]
command1
command2
...
dependency1: dependency2
...
dependency2: ...
commmand3

15. EXPORT DO PDFEXPORT DO PDF
...
pdf:
@/home/ikar/ctvrtkon/node_modules/.bin/reveal-md
--print ctvrtkon.pdf
README.md
$ time make pdf
Attempting to print "README.md?print-pdf"
to filename "ctvrtkon.pdf" as PDF.
real 0m2,089s
user 0m1,287s
sys 0m0,191s

16. EXPORT DO PDFEXPORT DO PDF
...
pdf: ctvrtkon.pdf
@echo "Done ✓"
ctvrtkon.pdf: README.md
@/home/ikar/ctvrtkon/node_modules/.bin/reveal-md
--print ctvrtkon.pdf
README.md
$ time make pdf
Done ✓
real 0m0,007s
user 0m0,004s
sys 0m0,003s

17. NPM / YARN INSTALLNPM / YARN INSTALL
install: .yarn.success
@echo "All deps satisfied!"
.yarn.success: package.json
@yarn install && touch .yarn.success

18. NPM / YARN INSTALLNPM / YARN INSTALL
$ time make install
yarn install v1.12.3
[1/4] Resolving packages...
success Already up-to-date.
Done in 0.28s.
All deps satisfied!
real 0m0,723s
user 0m0,770s
sys 0m0,050s
$ time make install
All deps satisfied!
real 0m0,007s
user 0m0,007s
sys 0m0,000s

19. TATO PREZENTACETATO PREZENTACE
...
reveal: install run ## reveal-md presentation
run:
@/home/ikar/ctvrtkon/node_modules/.bin/reveal-md
--host 0.0.0.0 --watch --theme white --port 2019
README.md
install: .yarn.success
@echo "All deps satisfied!"
...
$ make reveal
All deps satisfied!
Reveal-server started at http://0.0.0.0:2019

20. DĚKUJI ZADĚKUJI ZA
POZORNOSTPOZORNOST
https://gitlab.com/ikar/ctvrtkon

21. GOTCHASGOTCHAS

22. SPACESSPACES
...
test:
echo ahoj
$ make test
Makefile:33: *** missing separator. Stop.

23. ESCAPOVÁNÍ SHELLESCAPOVÁNÍ SHELL
VARIABLESVARIABLES
...
A=makefile_a
B=makefile_b
test:
@A=shell_a; echo $A
@B=shell_b; echo $$B
$ make test
makefile_a
shell_b

24. NEJSME V BASHINEJSME V BASHI
...
tip:
test:
echo $$RANDOM
$ make test
echo $RANDOM
http://mywiki.wooledge.org/Bashism

25. UŽ JSME V BASHIUŽ JSME V BASHI
...
SHELL := /bin/bash
test:
echo $$RANDOM
$ make test
echo $RANDOM
42

26. KAM DÁLKAM DÁL
http://shop.oreilly.com/product/9780596006105.do

27. DĚKUJI ZADĚKUJI ZA
POZORNOSTPOZORNOST
https://gitlab.com/ikar/ctvrtkon