1 files changed, 88 insertions, 0 deletions
diff --git a/Makefile b/Makefile
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+# 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