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Fix musl build on various platforms

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jaseg 2016-11-18 10:22:53 +01:00 • committed by jaseg
parent f585abdc4f
commit ce0ee8d538
3 changed files with 55 additions and 18 deletions
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32
Makefile
View file

@ -1,9 +1,11 @@
LOLCAT_SRC := lolcat.c
CENSOR_SRC := censor.c
CFLAGS := -std=c11 -Wall -g
LOLCAT_SRC ?= lolcat.c
CENSOR_SRC ?= censor.c
CFLAGS ?= -std=c11 -Wall -g
DESTDIR := /usr/local/bin
DESTDIR ?= /usr/local/bin
include Makefile.musl
ifeq ($(shell uname -s),Darwin)
LOLCAT_SRC += memorymapping/src/fmemopen.c
@ -15,21 +17,15 @@ all: lolcat-static censor-static
.PHONY: install clean musl static
musl/lib/libc.a musl/lib/crt1.o:
cd musl; ./configure
make -C musl
musl: musl/lib/libc.a musl/lib/crt1.o
static: lolcat-static censor-static
lolcat-static: lolcat.c musl
gcc -c $(CFLAGS) -Imusl/include -o lolcat.o $<
gcc -s -nostartfiles -nodefaultlibs -nostdinc -static -ffunction-sections -fdata-sections -Wl,--gc-sections -o $@ lolcat.o musl/lib/crt1.o musl/lib/libc.a
lolcat-static: lolcat.c
gcc -c $(CFLAGS) -I$(MUSLDIR)/include -o lolcat.o $<
gcc -s -nostartfiles -nodefaultlibs -nostdinc -static -ffunction-sections -fdata-sections -Wl,--gc-sections -o $@ lolcat.o $(MUSLDIR)/lib/crt1.o $(MUSLDIR)/lib/libc.a
censor-static: censor.c musl
gcc -c $(CFLAGS) -Imusl/include -o censor.o $<
gcc -s -nostartfiles -nodefaultlibs -nostdinc -static -ffunction-sections -fdata-sections -Wl,--gc-sections -o $@ censor.o musl/lib/crt1.o musl/lib/libc.a
censor-static: censor.c
gcc -c $(CFLAGS) -I$(MUSLDIR)/include -o censor.o $<
gcc -s -nostartfiles -nodefaultlibs -nostdinc -static -ffunction-sections -fdata-sections -Wl,--gc-sections -o $@ censor.o $(MUSLDIR)/lib/crt1.o $(MUSLDIR)/lib/libc.a
lolcat: $(LOLCAT_SRC)
gcc $(CFLAGS) -o $@ $^
@ -37,11 +33,11 @@ lolcat: $(LOLCAT_SRC)
censor: $(CENSOR_SRC)
gcc $(CFLAGS) -o $@ $^
install: lolcat censor
install: lolcat-static censor-static
install lolcat-static $(DESTDIR)/lolcat
install censor-static $(DESTDIR)/censor
clean:
rm -f lolcat lolcat-static.o lolcat-static censor censor-static.o censor-static
make -C musl clean
# make -C musl clean

27
Makefile.musl Normal file
View file

@ -0,0 +1,27 @@
ifneq (,$(wildcard /usr/local/musl))
MUSLDIR ?= /usr/local/musl
else ifneq (,$(wildcard /usr/lib/musl))
MUSLDIR ?= /usr/lib/musl
else ifneq (,$(wildcard musl/Makefile))
MUSLDIR ?= musl
lolcat-static: musl
censor-static: musl
else
$(info "musl not found. If the build does not go through, consider either installing")
$(info "musl system-wide using your favorite package manager or fetching and building a")
$(info "local copy using:")
$(info "$ git submodule init")
$(info "$ git submodule update")
$(info "$ make musl")
endif
$(info "Using musl at $(MUSLDIR)")
musl/lib/libc.a musl/lib/crt1.o: musl/config.mak
make -C musl
musl/config.mak:
cd musl; ./configure
musl: musl/lib/libc.a musl/lib/crt1.o

14
README.md
View file

@ -24,6 +24,20 @@ $ yaourt -S c-lolcat
$ make && sudo make install
```
If this can't find musl and you have it installed somewhere, run
```bash
$ make MUSLDIR=/path/to/musl
```
If you don't have a musl around yet, the easiest way to build is to run
```bash
$ git submodule init
$ git submodule update
$ make
```
This will checkout and build musl in this repository's ```musl``` dir.
## Why?
This `lolcat` clone is an attempt to reduce the world's carbon dioxide emissions by optimizing inefficient code. It's >10x as fast and <0.1% as large as the original one.