# figure out what kind of host we are running on
host-arch := $(shell uname -m | \
sed -e s/i.86/i386/ -e s/sun4u/sparc64/ -e s/arm.*/arm/)
# ##############################################################################
# User variables
# user variables can be specified in the environment or in a .config file
-include .config
# ARCH -- what architecture are we compiling for?
ARCH ?= ${host-arch}
# LITMUS_KERNEL -- where to find the litmus kernel?
LITMUS_KERNEL ?= ../litmus2010
# ##############################################################################
# Internal configuration.
# compiler flags
flags-debug = -Wall -Werror -g -Wdeclaration-after-statement
flags-api = -D_XOPEN_SOURCE=600 -D_GNU_SOURCE
# architecture-specific flags
flags-i386 = -m32
flags-x86_64 = -m64
flags-sparc64 = -mcpu=v9 -m64
# default: none
# name of the directory that has the arch headers in the Linux source
include-i386 = x86
include-x86_64 = x86
include-sparc64 = sparc
# default: the arch name
include-${ARCH} ?= ${ARCH}
# name of the file(s) that holds the actual system call numbers
unistd-i386 = unistd.h unistd_32.h
unistd-x86_64 = unistd.h unistd_64.h
# default: unistd.h
unistd-${ARCH} ?= unistd.h
# by default we use the local version
LIBLITMUS ?= .
# where to find header files
headers = -I${LIBLITMUS}/include -I${LIBLITMUS}/arch/${include-${ARCH}}/include
# combine options
CPPFLAGS = ${flags-api} ${flags-${ARCH}} -DARCH=${ARCH} ${headers}
CFLAGS = ${flags-debug}
LDFLAGS = ${flags-${ARCH}}
# how to link against liblitmus
liblitmus-flags = -L${LIBLITMUS} -llitmus
# Force gcc instead of cc, but let the user specify a more specific version if
# desired.
ifeq (${CC},cc)
CC = gcc
endif
# incorporate cross-compiler (if any)
CC := ${CROSS_COMPILE}${CC}
LD := ${CROSS_COMPILE}${LD}
AR := ${CROSS_COMPILE}${AR}
# ##############################################################################
# Targets
all = lib ${rt-apps}
rt-apps = cycles base_task rt_launch rtspin release_ts measure_syscall \
base_mt_task runtests
.PHONY: all lib clean dump-config TAGS tags cscope help
all: ${all} inc/config.makefile
# Write a distilled version of the flags for clients of the library. Ideally,
# this should depend on liblitmus.a, but that requires LIBLITMUS to be a
# private override. Private overrides are only supported starting with make
# 3.82, which is not yet in common use.
inc/config.makefile: LIBLITMUS = $${LIBLITMUS}
inc/config.makefile: Makefile
@printf "%-15s= %-20s\n" \
ARCH ${ARCH} \
CFLAGS '${CFLAGS}' \
LDFLAGS '${LDFLAGS}' \
LDLIBS '${liblitmus-flags}' \
CPPFLAGS '${CPPFLAGS}' \
CC '${shell which ${CC}}' \
LD '${shell which ${LD}}' \
AR '${shell which ${AR}}' \
> $@
dump-config:
@echo Build configuration:
@printf "%-15s= %-20s\n" \
ARCH ${ARCH} \
LITMUS_KERNEL "${LITMUS_KERNEL}" \
CROSS_COMPILE "${CROSS_COMPILE}" \
headers "${headers}" \
"kernel headers" "${imported-headers}" \
CFLAGS "${CFLAGS}" \
LDFLAGS "${LDFLAGS}" \
CPPFLAGS "${CPPFLAGS}" \
CC "${CC}" \
CPP "${CPP}" \
LD "${LD}" \
AR "${AR}" \
obj-all "${obj-all}"
help:
@cat INSTALL
clean:
rm -f ${rt-apps}
rm -f *.o *.d *.a test_catalog.inc
rm -f ${imported-headers}
rm -f inc/config.makefile
rm -f tags TAGS cscope.files cscope.out
# Emacs Tags
TAGS:
@echo TAGS
@find . -type f -and -iname '*.[ch]' | xargs etags
# Vim Tags
tags:
@echo tags
@find . -type f -and -iname '*.[ch]' | xargs ctags
# cscope DB
cscope:
@echo cscope
@find . -type f -and -iname '*.[ch]' | xargs printf "%s\n" > cscope.files
@cscope -b
# ##############################################################################
# Kernel headers.
# The kernel does not like being #included directly, so let's
# copy out the parts that we need.
# Litmus headers
include/litmus/%.h: ${LITMUS_KERNEL}/include/litmus/%.h
@mkdir -p ${dir $@}
cp $< $@
# asm headers
arch/${include-${ARCH}}/include/asm/%.h: \
${LITMUS_KERNEL}/arch/${include-${ARCH}}/include/asm/%.h
@mkdir -p ${dir $@}
cp $< $@
litmus-headers = include/litmus/rt_param.h include/litmus/unistd_32.h \
include/litmus/unistd_64.h
unistd-headers = \
$(foreach file,${unistd-${ARCH}},arch/${include-${ARCH}}/include/asm/$(file))
imported-headers = ${litmus-headers} ${unistd-headers}
# Let's not copy these twice.
.SECONDARY: ${imported-headers}
# ##############################################################################
# liblitmus
lib: liblitmus.a
# all .c file in src/ are linked into liblitmus
vpath %.c src/
obj-lib = $(patsubst src/%.c,%.o,$(wildcard src/*.c))
liblitmus.a: ${obj-lib}
${AR} rcs $@ $+
# ##############################################################################
# Tests suite.
# tests are found in tests/
vpath %.c tests/
src-runtests = $(wildcard tests/*.c)
obj-runtests = $(patsubst tests/%.c,%.o,${src-runtests})
# generate list of tests automatically
test_catalog.inc: $(filter-out tests/runner.c,${src-runtests})
tests/make_catalog.py $+ > $@
tests/runner.c: test_catalog.inc
# ##############################################################################
# Tools that link with liblitmus
# these source files are found in bin/
vpath %.c bin/
obj-cycles = cycles.o
obj-base_task = base_task.o
obj-base_mt_task = base_mt_task.o
ldf-base_mt_task = -pthread
obj-rt_launch = rt_launch.o common.o
obj-rtspin = rtspin.o common.o
lib-rtspin = -lrt
obj-release_ts = release_ts.o
obj-measure_syscall = null_call.o
lib-measure_syscall = -lm
# ##############################################################################
# Build everything that depends on liblitmus.
.SECONDEXPANSION:
${rt-apps}: $${obj-$$@} liblitmus.a
$(CC) -o $@ $(LDFLAGS) ${ldf-$@} $(filter-out liblitmus.a,$+) $(LOADLIBS) $(LDLIBS) ${lib-$@} ${liblitmus-flags}
# ##############################################################################
# Dependency resolution.
vpath %.c bin/ src/ tests/
obj-all = ${sort ${foreach target,${all},${obj-${target}}}}
# rule to generate dependency files
%.d: %.c ${imported-headers}
@set -e; rm -f $@; \
$(CC) -MM $(CPPFLAGS) $< > $@.$$$$; \
sed 's,\($*\)\.o[ :]*,\1.o $@ : ,g' < $@.$$$$ > $@; \
rm -f $@.$$$$
ifeq ($(MAKECMDGOALS),)
MAKECMDGOALS += all
endif
ifneq ($(filter-out dump-config clean help,$(MAKECMDGOALS)),)
# Pull in dependencies.
-include ${obj-all:.o=.d}
# Let's make sure the kernel header path is ok.
config-ok := $(shell test -d "${LITMUS_KERNEL}" || echo invalid path. )
config-ok += $(shell test -f "${LITMUS_KERNEL}/${word 1,${litmus-headers}}" \
|| echo cannot find header. )
ifneq ($(strip $(config-ok)),)
$(info (!!) Could not find a LITMUS^RT kernel at ${LITMUS_KERNEL}: ${config-ok})
$(info (!!) Are you sure the path is correct?)
$(info (!!) Run 'make dump-config' to see the build configuration.)
$(info (!!) Edit the file .config to override the default configuration.)
$(error Cannot build without access to the LITMUS^RT kernel source)
endif
kernel-unistd-hdrs := $(foreach file,${unistd-headers},${LITMUS_KERNEL}/$(file))
hdr-ok := $(shell egrep '\#include ["<]litmus/unistd' ${kernel-unistd-hdrs} )
ifeq ($(strip $(hdr-ok)),)
$(info (!!) Could not find LITMUS^RT system calls in ${kernel-unistd-hdrs}.)
$(error Your kernel headers do not seem to be LITMUS^RT headers)
endif
config-ok := $(shell test -f "${LITMUS_KERNEL}/${word 1,${unistd-headers}}" \
|| echo fail )
ifneq ($(config-ok),)
$(info (!!) Could not find the architecture-specifc Linux headers.)
$(info (!!) Are you sure ARCH=${ARCH} is correct?)
$(info (!!) Run 'make dump-config' to see the build configuration.)
$(info (!!) Edit the file '.config' to override the default configuration.)
$(error Cannot build without access to the architecture-specific files)
endif
endif
