Added openmp support for both fftw-2 and fftw-3. Added as-needed fixes for fftw-3, needed for threads support. Added a doc use flag for fftw-3.

Package-Manager: portage-2.1.4.4

8 files changed, 350 insertions, 15 deletions

diff --git a/sci-libs/fftw/ChangeLog b/sci-libs/fftw/ChangeLog
index 93c99bca0a48..a1bde79e6c27 100644
--- a/sci-libs/fftw/ChangeLog
+++ b/sci-libs/fftw/ChangeLog
@@ -1,6 +1,16 @@
 # ChangeLog for sci-libs/fftw
 # Copyright 2002-2008 Gentoo Foundation; Distributed under the GPL v2
-# $Header: /var/cvsroot/gentoo-x86/sci-libs/fftw/ChangeLog,v 1.66 2008/06/23 14:31:13 bicatali Exp $
+# $Header: /var/cvsroot/gentoo-x86/sci-libs/fftw/ChangeLog,v 1.67 2008/07/02 09:20:22 bicatali Exp $
+
+*fftw-3.1.2-r1 (02 Jul 2008)
+*fftw-2.1.5-r5 (02 Jul 2008)
+
+  02 Jul 2008; Sébastien Fabbro <bicatali@gentoo.org>
+  files/fftw-2.1.5-configure.in.patch, +files/fftw-3.1.2-as-needed.patch,
+  files/fftw-3.1.2-configure.ac.patch, +files/fftw-3.1.2-openmp.patch,
+  +fftw-2.1.5-r5.ebuild, +fftw-3.1.2-r1.ebuild:
+  Added openmp support for both fftw-2 and fftw-3. Added as-needed fixes for
+  fftw-3, needed for threads support. Added a doc use flag for fftw-3.
 
   23 Jun 2008; Sébastien Fabbro <bicatali@gentoo.org>
   +files/fftw-2.1.5-no-test.patch, fftw-2.1.5-r4.ebuild, fftw-3.1.2.ebuild:
diff --git a/sci-libs/fftw/Manifest b/sci-libs/fftw/Manifest
index 89541145fe27..9f8ee1e11a3e 100644
--- a/sci-libs/fftw/Manifest
+++ b/sci-libs/fftw/Manifest
@@ -2,19 +2,23 @@
 Hash: SHA1
 
 AUX fftw-2.1.5-as-needed.patch 4374 RMD160 b9bc387a322cec9d36d7d7ff54e556e907767742 SHA1 3274a914d3532190fb8c2c96d944c85b5ab47237 SHA256 b1d65b2dca62257db5c78e81577fb87b7d79f6eb75b8899de48faabfc702e9f0
-AUX fftw-2.1.5-configure.in.patch 6456 RMD160 18d01f44617cc5d7bfd7c34d944caefcd6fd2be0 SHA1 8ebbf4fd43558bd2ec3a9f7402be78d75074eabe SHA256 04aa10f41edb1e5a1c4513021f24fe953c7f2a740a4d15363a6ae24b94bf2a3e
+AUX fftw-2.1.5-configure.in.patch 7039 RMD160 dd7e27aae926d4d736efadc43355d80b330bb5f0 SHA1 93290c9d2e553293e9377e50ac0ad8a46aad5ea4 SHA256 5d31a7aa798febdaad0d59679d2540e69bf8bec68cb0cbfaf4e597a7ae7c964e
 AUX fftw-2.1.5-no-test.patch 1592 RMD160 86ec7b7fd58a1c67ecc7b53f4927bb23cf88d668 SHA1 356283400cd80bcdd90d32a6dee0aa43d34cfe4f SHA256 e56d733196008b8d0366cae20a3d1966cc4f16d2276a93c37b59086a8322b83a
-AUX fftw-3.1.2-configure.ac.patch 523 RMD160 1b4936d4bdbdc0ee7c39a6b54a3d27a681013a4f SHA1 f77634e1cc92d1e42c368cdfd78af995fcbfa6e2 SHA256 e203086198ec9cb65caddb432dcfe2cc207bb197d22c7ca21c0bc37a0c725ea5
+AUX fftw-3.1.2-as-needed.patch 1199 RMD160 9132ee7cb555967dd852dd2a9be11a7b13dd900b SHA1 abace49a909a24a735c4768b0454c7b8b560f443 SHA256 5d5e6ff5dff0faa01f7dd81634c5f4a9bc1e0532161ece7112f514dedfe0ff03
+AUX fftw-3.1.2-configure.ac.patch 924 RMD160 eedb92c6ad39fd6ba4daefec3cb910f507eb5add SHA1 03fa6d09a1408e129a1eeff190c17d8051406245 SHA256 2d239069d4d3cef3781fc2b5aa68289b6c5591f3c0d84982f3251f0a3505bc6e
+AUX fftw-3.1.2-openmp.patch 473 RMD160 f369626bf8a923b71f92607f5691990d5cb1ac33 SHA1 762b373c14905865da3c018544356a55fd43822c SHA256 c0d1dcebf0a6438e406e14aa22cd697fb06195b9f32dc607301e0e27967d53be
 DIST fftw-2.1.5.tar.gz 1256888 RMD160 723308722d76c12710db6473979adf8d086b0909 SHA1 12020b58edc1b0490a83db4aa912fac5dfdfb26b SHA256 f8057fae1c7df8b99116783ef3e94a6a44518d49c72e2e630c24b689c6022630
 DIST fftw-3.1.2.tar.gz 2736360 RMD160 13069b3582eeaa1fba1614cdca2dfbc2e45ab585 SHA1 3e4c64009ffb48123a0f30f46c1d89da7810dc67 SHA256 e1b92e97fe27efcbd150212d0d287ac907bd2fef0af32e16284fef5d1c1c26bf
 EBUILD fftw-2.1.5-r4.ebuild 3435 RMD160 6dec3455cbb6e4804d1d0899a9816a7c771aef03 SHA1 e385b611622d2f4fa0f5c16bdf12df516fb60ade SHA256 9cc764af059cd98c3902d0e483b4f909b6269824a43201f9a776ff30541b8e10
+EBUILD fftw-2.1.5-r5.ebuild 3463 RMD160 e262b984ef21804780fc96590dc439619f4dac18 SHA1 e9de3617f4aec410583d270f25424bb34e0970eb SHA256 dc817da9017629c671875772d0afd44729fe536576222ade46d9f50f15677794
+EBUILD fftw-3.1.2-r1.ebuild 3252 RMD160 61923adace2d8b98355cc9cb06eed8f792d77173 SHA1 349cfe59d857f8a6819ef96ee52b708c495578ab SHA256 188188bddbed0bb57fa8d401673767014d871f8e113537ebb03af1bb8e794068
 EBUILD fftw-3.1.2.ebuild 3028 RMD160 ccae2a7aa9987a6dadac0de1b6c22d70f267c14d SHA1 a099a89a2fe1164b78b05b2a41d29b4a8c4a776a SHA256 96b29aa7df715b9765596d0e9c69a69013232e412d255afbc71e58feb3160804
-MISC ChangeLog 14489 RMD160 a5d23ba48a849d66ff2384beaae052266d4051df SHA1 adfbb6e5d8c61017246a69018684a4ad3158c99e SHA256 24bac7fcd6cf0ad9b4a237f8d93c0448de6416541e3b214453761022dfd346f6
+MISC ChangeLog 14945 RMD160 75c0a5a8eb9bda7cf1cc79412abd036bc9f2acb1 SHA1 b523011778ba2c38dc35712f021341d6a6bda3cf SHA256 c54cbd7dadcaebaf3a78de1844a58f2f9d301c05829c6ab494506cfa39756276
 MISC metadata.xml 637 RMD160 a7f1ab3fce5eae79531875234ca77532d0fd2cfa SHA1 b1cce6af4d119fc1b4f640b33e4ef1a8318a736c SHA256 a2798427fe8d4cbe97cf588e66bf54cc37d9650b9451290c2b6846cc6bb81e50
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 Version: GnuPG v2.0.9 (GNU/Linux)
 
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-MqsAn2FCx/0gYFZ2pCm5g/kVRPZ3Y1kP
-=qxCV
+iEYEARECAAYFAkhrSGAACgkQ1ycZbhPLE2BXgACeM77buPWt8abmlgw4g4/BOvqV
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diff --git a/sci-libs/fftw/fftw-2.1.5-r5.ebuild b/sci-libs/fftw/fftw-2.1.5-r5.ebuild
new file mode 100644
index 000000000000..a5ec2b4e6b7d
--- /dev/null
+++ b/sci-libs/fftw/fftw-2.1.5-r5.ebuild
@@ -0,0 +1,129 @@
+# Copyright 1999-2008 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sci-libs/fftw/fftw-2.1.5-r5.ebuild,v 1.1 2008/07/02 09:20:22 bicatali Exp $
+
+inherit eutils flag-o-matic multilib autotools fortran
+
+DESCRIPTION="Fast C library for the Discrete Fourier Transform"
+SRC_URI="http://www.fftw.org/${P}.tar.gz"
+HOMEPAGE="http://www.fftw.org"
+
+# hppa does not have yet a virtual/mpi
+DEPEND="mpi? ( virtual/mpi )"
+
+SLOT="2.1"
+LICENSE="GPL-2"
+IUSE="doc float fortran mpi openmp threads"
+
+KEYWORDS="~alpha ~amd64 ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86"
+
+pkg_setup() {
+	# this one is reported to cause trouble on pentium4 m series
+	filter-mfpmath "sse"
+
+	# here I need (surprise) to increase optimization:
+	# --enable-i386-hacks requires -fomit-frame-pointer to work properly
+	if [ "${ARCH}" == "x86" ]; then
+		is-flag "-fomit-frame-pointer" || append-flags "-fomit-frame-pointer"
+	fi
+	FORTRAN="gfortran ifc g77"
+	use fortran && fortran_pkg_setup
+}
+
+src_unpack() {
+	# doc suggests installing single and double precision versions
+	#  via separate compilations. will do in two separate source trees
+	# since some sed'ing is done during the build
+	# (?if --enable-type-prefix is set?)
+
+	unpack ${A}
+	cd "${S}"
+	epatch "${FILESDIR}"/${P}-as-needed.patch
+	epatch "${FILESDIR}"/${P}-configure.in.patch
+	epatch "${FILESDIR}"/${P}-no-test.patch
+
+	# fix info files
+	for infofile in doc/fftw*info*; do
+		cat >> ${infofile} <<-EOF
+			INFO-DIR-SECTION Libraries
+			START-INFO-DIR-ENTRY
+			* fftw: (fftw).				${DESCRIPTION}
+			END-INFO-DIR-ENTRY
+		EOF
+	done
+
+	eautoreconf
+
+	cd "${WORKDIR}"
+	cp -R ${P} ${P}-double
+	mv ${P} ${P}-single
+}
+
+src_compile() {
+	cd "${S}-single"
+	econf \
+		--enable-float \
+		--enable-shared \
+		--enable-type-prefix \
+		--enable-vec-recurse \
+		$(use_enable threads) \
+		$(use_with openmp) \
+		$(use_enable fortran) \
+		$(use_enable mpi) \
+		$(use_enable x86 i386-hacks) \
+		|| die "econf for float failed"
+	emake || die "emake for float failed"
+
+	# the only difference here is no --enable-float
+	cd "${S}-double"
+	econf \
+		--enable-shared \
+		--enable-type-prefix \
+		--enable-vec-recurse \
+		$(use_enable threads) \
+		$(use_with openmp) \
+		$(use_enable fortran) \
+		$(use_enable mpi) \
+		$(use_enable x86 i386-hacks) \
+		|| die "econf for double failed"
+	emake || die "emake for double failed"
+}
+
+src_test() {
+	cd "${S}-single"
+	emake -j1 check || die "emake check single failed"
+	cd "${S}-double"
+	emake -j1 check || die "emake check double failed"
+}
+
+src_install () {
+
+	# both builds are installed in the same place
+	# libs are distinguished by prefix (s or d), see docs for details
+
+	cd "${S}-single"
+	emake DESTDIR="${D}" install || die "emake install float failed"
+	insinto /usr/include
+	doins fortran/fftw_f77.i || die "doins failed"
+	dodoc AUTHORS ChangeLog NEWS TODO README README.hacks || die "dodoc failed"
+	use doc && dohtml doc/*
+
+	cd "${S}-double"
+	emake DESTDIR="${D}" install || die "emake install double failed"
+
+	if use float; then
+		for f in "${D}"/usr/{include,$(get_libdir)}/*sfft*; do
+			ln -s $(basename ${f}) ${f/sfft/fft}
+		done
+		for f in "${D}"/usr/{include,$(get_libdir)}/*srfft*; do
+			ln -s $(basename ${f}) ${f/srfft/rfft}
+		done
+	else
+		for f in "${D}"/usr/{include,$(get_libdir)}/*dfft*; do
+			ln -s $(basename ${f}) ${f/dfft/fft}
+		done
+		for f in "${D}"/usr/{include,$(get_libdir)}/*drfft*; do
+			ln -s $(basename ${f}) ${f/drfft/rfft}
+		done
+	fi
+}
diff --git a/sci-libs/fftw/fftw-3.1.2-r1.ebuild b/sci-libs/fftw/fftw-3.1.2-r1.ebuild
new file mode 100644
index 000000000000..3989ae95b521
--- /dev/null
+++ b/sci-libs/fftw/fftw-3.1.2-r1.ebuild
@@ -0,0 +1,119 @@
+# Copyright 1999-2008 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Header: /var/cvsroot/gentoo-x86/sci-libs/fftw/fftw-3.1.2-r1.ebuild,v 1.1 2008/07/02 09:20:22 bicatali Exp $
+
+inherit flag-o-matic eutils toolchain-funcs autotools fortran
+
+DESCRIPTION="Fast C library for the Discrete Fourier Transform"
+HOMEPAGE="http://www.fftw.org/"
+SRC_URI="http://www.fftw.org/${P}.tar.gz"
+
+LICENSE="GPL-2"
+SLOT="3.0"
+KEYWORDS="~alpha ~amd64 ~arm ~hppa ~ia64 ~mips ~ppc ~ppc64 ~sparc ~x86"
+IUSE="altivec doc fortran openmp sse sse2 threads"
+
+pkg_setup() {
+	FORTRAN="gfortran ifc g77"
+	use fortran && fortran_pkg_setup
+}
+
+src_unpack() {
+	unpack ${A}
+	cd "${S}"
+	epatch "${FILESDIR}"/${P}-configure.ac.patch
+	epatch "${FILESDIR}"/${P}-openmp.patch
+	epatch "${FILESDIR}"/${P}-as-needed.patch
+
+	# fix info file
+	sed -e 's/Texinfo documentation system/Libraries/' \
+		-i doc/fftw3.info || die "failed to fix info file"
+	AT_M4DIR=m4 eautoreconf
+	cd "${WORKDIR}"
+	mv ${P} ${P}-single
+	cp -pPR ${P}-single ${P}-double
+	cp -pPR ${P}-single ${P}-longdouble
+}
+
+src_compile() {
+	# filter -Os according to docs
+	replace-flags -Os -O2
+
+	local myconfcommon="--enable-shared
+		$(use_with openmp)
+		$(use_enable threads)
+		$(use_enable fortran)"
+	local myconfsingle=""
+	local myconfdouble=""
+	local myconflongdouble=""
+
+	if use sse2; then
+		myconfsingle="${myconfsingle} --enable-sse"
+		myconfdouble="${myconfdouble} --enable-sse2"
+	elif use sse; then
+		myconfsingle="${myconfsingle} --enable-sse"
+	fi
+	# altivec only helps floats, not doubles
+	if use altivec; then
+		myconfsingle="${myconfsingle} --enable-altivec"
+	fi
+
+	cd "${S}-single"
+	econf \
+		--enable-float \
+		${myconfcommon} \
+		${myconfsingle} || \
+			die "econf single failed"
+	emake || die "emake single failed"
+
+	# the only difference here is no --enable-float
+	cd "${S}-double"
+	econf \
+		${myconfcommon} \
+		${myconfdouble} || \
+		die "econf double failed"
+	emake || die "emake double failed"
+
+	# the only difference here is --enable-long-double
+	cd "${S}-longdouble"
+	econf \
+		--enable-long-double \
+		${myconfcommon} \
+		${myconflongdouble} || \
+		die "econf long double failed"
+	emake || die "emake long double failed"
+}
+
+
+src_test () {
+	# We want this to be a reasonably quick test, but that is still hard...
+	ewarn "This test series will take 30 minutes on a modern 2.5Ghz machine"
+	# Do not increase the number of threads, it will not help your performance
+	#local testbase="perl check.pl --nthreads=1 --estimate"
+	#		${testbase} -${p}d || die "Failure: $n"
+	for d in single double longdouble; do
+		cd "${S}-${d}"/tests
+		einfo "Testing ${PN}-${d}"
+		emake -j1 check || die "emake test failed"
+	done
+}
+
+src_install () {
+	# all builds are installed in the same place
+	# libs have distinuguished names; include files, docs etc. identical.
+	for i in single double longdouble; do
+		cd "${S}-${i}"
+		emake DESTDIR="${D}" install || die "emake install for ${i} failed"
+	done
+
+	# Install documentation.
+	cd "${S}-single"
+	dodoc AUTHORS ChangeLog NEWS README TODO COPYRIGHT CONVENTIONS || die
+	if use doc; then
+		cd doc
+		insinto /usr/share/doc/${PF}
+		doins -r html fftw3.pdf || die "doc install failed"
+		insinto /usr/share/doc/${PF}/faq
+		doins FAQ/fftw-faq.html/*
+	fi
+}
diff --git a/sci-libs/fftw/files/fftw-2.1.5-configure.in.patch b/sci-libs/fftw/files/fftw-2.1.5-configure.in.patch
index f4dde992611f..62b388590e12 100644
--- a/sci-libs/fftw/files/fftw-2.1.5-configure.in.patch
+++ b/sci-libs/fftw/files/fftw-2.1.5-configure.in.patch
@@ -1,5 +1,5 @@
---- configure.in.orig	2008-04-01 22:46:45.943787297 +0100
-+++ configure.in	2008-04-01 22:58:13.510969518 +0100
+--- configure.in.orig	2008-06-22 17:01:59.013047109 +0100
++++ configure.in	2008-06-22 17:17:39.421924454 +0100
 @@ -1,6 +1,7 @@
  dnl Process this file with autoconf to produce a configure script.
  AC_INIT(fftw/planner.c)
@@ -95,7 +95,24 @@
  fi
  
  
-@@ -243,7 +244,7 @@
+@@ -230,6 +231,16 @@
+ 		AC_TRY_LINK_FUNC(omp_set_num_threads,THREADLIBS=" "
+ 			omp_enabler="$CC -omp")
+ 		if test -z "$THREADLIBS"; then
++			CFLAGS="$save_CFLAGS -fopenmp"
++			AC_TRY_LINK_FUNC(omp_set_num_threads,THREADLIBS="-lgomp"
++				omp_enabler="$CC -fopenmp")
++		fi
++		if test -z "$THREADLIBS"; then
++			CFLAGS="$save_CFLAGS -fopenmp"
++			AC_TRY_LINK_FUNC(omp_set_num_threads,THREADLIBS=""
++				omp_enabler="$CC -openmp")
++		fi
++		if test -z "$THREADLIBS"; then
+ 			CFLAGS="$save_CFLAGS -mp"
+ 			AC_TRY_LINK_FUNC(omp_set_num_threads,THREADLIBS=" "
+ 				omp_enabler="$CC -mp")
+@@ -243,7 +249,7 @@
  		if test -z "$THREADLIBS"; then
  			AC_MSG_ERROR([don't know how to enable OpenMP])
  		fi
@@ -104,7 +121,7 @@
  	fi
  	if test "$with_sgimp"x != nox; then
  		AC_MSG_CHECKING(how to enable SGI MP)
-@@ -261,7 +262,7 @@
+@@ -261,7 +267,7 @@
  		if test -z "$THREADLIBS"; then 
  			AC_MSG_ERROR([don't know how to enable SGI MP])
  		fi
@@ -113,7 +130,7 @@
  	fi
  
  	# POSIX threads, the default choice:
-@@ -270,38 +271,38 @@
+@@ -270,38 +276,38 @@
  		ACX_PTHREAD([THREADLIBS="$PTHREAD_LIBS "
  	                     CFLAGS="$CFLAGS $PTHREAD_CFLAGS"
  	                     CC="$PTHREAD_CC"
@@ -158,7 +175,7 @@
  	fi
  	if test -z "$THREADLIBS"; then
  		AC_MSG_ERROR(couldn't find threads library for --enable-threads)
-@@ -334,7 +335,7 @@
+@@ -334,7 +340,7 @@
  	CC="$MPICC"
  	ok=yes
  	AC_TRY_LINK([#include <mpi.h>
diff --git a/sci-libs/fftw/files/fftw-3.1.2-as-needed.patch b/sci-libs/fftw/files/fftw-3.1.2-as-needed.patch
new file mode 100644
index 000000000000..fca95715827c
--- /dev/null
+++ b/sci-libs/fftw/files/fftw-3.1.2-as-needed.patch
@@ -0,0 +1,35 @@
+--- Makefile.am.orig	2008-06-22 14:49:18.725790127 +0100
++++ Makefile.am	2008-06-22 15:09:37.339234950 +0100
+@@ -35,6 +35,13 @@
+ if THREADS
+ if COMBINED_THREADS
+ COMBINED_THREADLIBS=threads/libfftw3@PREC_SUFFIX@_threads.la
++else
++lib_LTLIBRARIES += libfftw3@PREC_SUFFIX@_threads.la
++libfftw3@PREC_SUFFIX@_threads_la_SOURCES = 
++libfftw3@PREC_SUFFIX@_threads_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@
++libfftw3@PREC_SUFFIX@_threads_la_LIBADD = \
++	libfftw3@PREC_SUFFIX@.la \
++	threads/libfftw3@PREC_SUFFIX@_threads.la
+ endif
+ endif
+ 
+--- threads/Makefile.am.orig	2008-07-01 11:46:56.464637525 +0100
++++ threads/Makefile.am	2008-07-01 11:48:02.268387467 +0100
+@@ -2,15 +2,12 @@
+ -I$(top_srcdir)/rdft -I$(top_srcdir)/api
+ 
+ if THREADS
+-if COMBINED_THREADS
+ noinst_LTLIBRARIES = libfftw3@PREC_SUFFIX@_threads.la
+-else
+-lib_LTLIBRARIES = libfftw3@PREC_SUFFIX@_threads.la
+-endif
+ endif
+ 
+ libfftw3@PREC_SUFFIX@_threads_la_SOURCES = api.c conf.c threads.c	\
+ threads.h dft-vrank-geq1.c ct.c rdft-vrank-geq1.c hc2hc.c		\
+ vrank-geq1-rdft2.c f77api.c f77funcs.h
+ 
++libfftw3@PREC_SUFFIX@_threads_la_LIBADD = $(THREADLIBS)
+ libfftw3@PREC_SUFFIX@_threads_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@
diff --git a/sci-libs/fftw/files/fftw-3.1.2-configure.ac.patch b/sci-libs/fftw/files/fftw-3.1.2-configure.ac.patch
index bbc0ccb6b5f8..de54a25dab05 100644
--- a/sci-libs/fftw/files/fftw-3.1.2-configure.ac.patch
+++ b/sci-libs/fftw/files/fftw-3.1.2-configure.ac.patch
@@ -1,5 +1,5 @@
---- configure.ac.orig	2008-03-31 23:03:45.200210228 +0100
-+++ configure.ac	2008-03-31 23:06:57.111081976 +0100
+--- configure.ac.orig	2008-06-30 23:10:27.431674828 +0100
++++ configure.ac	2008-06-30 23:50:59.266804845 +0100
 @@ -135,7 +135,7 @@
  AC_PROG_CC
  AX_COMPILER_VENDOR
@@ -18,3 +18,12 @@
  
  dnl Checks for header files.
  AC_HEADER_STDC
+@@ -362,7 +364,7 @@
+ THREADLIBS=""
+ if test "$enable_threads" = "yes"; then
+ 	if test "$with_openmp"x != nox; then
+-		AX_OPENMP([THREADLIBS=" "
++		AX_OPENMP([THREADLIBS="$OPENMP_LIBS"
+ 		  AC_DEFINE(USING_OPENMP_THREADS, 1, [Define if we have and are using OpenMP multithreading directives])
+                   CFLAGS="$CFLAGS $OPENMP_CFLAGS"],
+ 		  [AC_MSG_ERROR([don't know how to enable OpenMP])])
diff --git a/sci-libs/fftw/files/fftw-3.1.2-openmp.patch b/sci-libs/fftw/files/fftw-3.1.2-openmp.patch
new file mode 100644
index 000000000000..5ccfea691a8f
--- /dev/null
+++ b/sci-libs/fftw/files/fftw-3.1.2-openmp.patch
@@ -0,0 +1,12 @@
+--- m4/ax_openmp.m4.orig	2008-07-01 00:14:48.814076874 +0100
++++ m4/ax_openmp.m4	2008-06-30 23:42:30.534809664 +0100
+@@ -59,6 +59,9 @@
+ else
+   if test "x$ax_cv_[]_AC_LANG_ABBREV[]_openmp" != "xnone"; then
+     OPENMP_[]_AC_LANG_PREFIX[]FLAGS=$ax_cv_[]_AC_LANG_ABBREV[]_openmp
++    if test "x$ax_cv_[]_AC_LANG_ABBREV[]_openmp" = "x-fopenmp"; then
++        OPENMP_LIBS="-lgomp"
++    fi
+   fi
+   m4_default([$1], [AC_DEFINE(HAVE_OPENMP,1,[Define if OpenMP is enabled])])
+ fi