# Use a git submodule to download and build libtfm with the options we want.
#
# Author: Rob Austein
# Copyright (c) 2015, SUNET
#
# Redistribution and use in source and binary forms, with or
# without modification, are permitted provided that the following
# conditions are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
# ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# Maximum size of a bignum. See tfm.pdf section 1.3.6 ("Precision
# configuration") for details on how FP_MAX_SIZE works.
BITS := 8192
REPO := tomsfastmath
HDR := ${REPO}/src/headers/tfm.h
LIB := ${REPO}/libtfm.a
CFLAGS += -fPIC -Wall -W -Wshadow -Isrc/headers -g3 -DFP_MAX_SIZE="(${BITS}*2+(8*DIGIT_BIT))"
TARGETS := $(notdir ${HDR} ${LIB})
SHA256SUM := $(firstword $(wildcard /usr/local/bin/sha256sum /usr/local/bin/gsha256sum /usr/bin/sha256sum))
CHECKSUMS ?= Checksums
all: ${TARGETS}
clean:
rm -f ${TARGETS} $(notdir ${HDR}.tmp)
cd ${REPO}; ${MAKE} clean
distclean: clean
rm -f TAGS
${HDR}:
git submodule update --init
${LIB}: ${HDR}
cd ${REPO}; ${MAKE} clean
ifeq "" "${SHA256SUM}"
@echo "Couldn't find sha256sum, not verifying distribution checksums"
else
${SHA256SUM} --check ${CHECKSUMS}
endif
cd ${REPO}; ${MAKE} CFLAGS='${CFLAGS}'
$(notdir ${HDR}): ${HDR}
echo >$@.tmp '/* Configure size of largest bignum we want to handle -- see notes in tfm.pdf */'
echo >>$@.tmp '#define FP_MAX_SIZE (${BITS}*2+(8*DIGIT_BIT))'
echo >>$@.tmp ''
cat >>$@.tmp $^
mv -f $@.tmp $@
$(notdir ${LIB}): ${LIB}
ln -f $^ $@
tags: TAGS
TAGS: ${HDR}
find ${REPO} -type f -name '*.[ch]' -print | etags -
ifneq "" "${SHA256SUM}"
regenerate-checksums: ${HDR}
cd ${REPO}; git clean -dxf
find ${REPO} -name .git -prune -o -type f -print | sort | xargs ${SHA256SUM} >${CHECKSUMS}
endif
