after discussion with upstream the acx_mpilibs.m4 patching was just masking a general libtool problem with using mpicc to only link one folder. Attached a revised patch passing MPILIBS in via rules which should be safer. The change was also applied upstream.
diff -Nru fftw3-3.3.1/debian/changelog fftw3-3.3.1/debian/changelog --- fftw3-3.3.1/debian/changelog 2012-03-18 13:35:32.000000000 +0100 +++ fftw3-3.3.1/debian/changelog 2012-03-21 23:12:34.000000000 +0100 @@ -1,3 +1,10 @@ +fftw3 (3.3.1-4) UNRELEASED; urgency=low + + * debian/patches/fix-links.patch: + Fix links of the thread and mpi library (Closes: #664531) + + -- Julian Taylor <jtaylor.deb...@googlemail.com> Wed, 21 Mar 2012 23:04:11 +0100 + fftw3 (3.3.1-3) experimental; urgency=low * Add the multiarch support. Thanks to Julian Taylor for the patch diff -Nru fftw3-3.3.1/debian/patches/fix-links.patch fftw3-3.3.1/debian/patches/fix-links.patch --- fftw3-3.3.1/debian/patches/fix-links.patch 1970-01-01 01:00:00.000000000 +0100 +++ fftw3-3.3.1/debian/patches/fix-links.patch 2012-03-21 23:05:42.000000000 +0100 @@ -0,0 +1,355 @@ +Description: link threads and mpi libraries against fftw3 and mpi +Author: Julian Taylor <jtaylor.deb...@googlemail.com> +Forwarded: f...@fftw.org +Applied-Upstream: 3.3.2 + +--- a/Makefile.am ++++ b/Makefile.am +@@ -14,7 +14,7 @@ + ACLOCAL_AMFLAGS=-I m4 + + SUBDIRS=support $(GENFFT) kernel simd-support dft rdft reodft api \ +-threads libbench2 . tests mpi doc tools m4 ++libbench2 . threads tests mpi doc tools m4 + EXTRA_DIST=COPYRIGHT bootstrap.sh CONVENTIONS fftw.pc.in + + SIMD_LIBS = \ +--- a/mpi/Makefile.am ++++ b/mpi/Makefile.am +@@ -24,6 +24,7 @@ + libfftw3@PREC_SUFFIX@_mpi_la_SOURCES = $(SRC) $(TRANSPOSE_SRC) $(DFT_SRC) $(RDFT_SRC) $(RDFT2_SRC) + + libfftw3@PREC_SUFFIX@_mpi_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_mpi_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la @MPILIBS@ + + if THREADS + mpi_bench_CFLAGS = $(PTHREAD_CFLAGS) +--- a/threads/Makefile.am ++++ b/threads/Makefile.am +@@ -26,9 +26,11 @@ + vrank-geq1-rdft2.c f77api.c f77funcs.h + libfftw3@PREC_SUFFIX@_threads_la_CFLAGS = $(PTHREAD_CFLAGS) + libfftw3@PREC_SUFFIX@_threads_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_threads_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la + + libfftw3@PREC_SUFFIX@_omp_la_SOURCES = api.c conf.c openmp.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@_omp_la_CFLAGS = $(OPENMP_CFLAGS) + libfftw3@PREC_SUFFIX@_omp_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_omp_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la +--- a/Makefile.in ++++ b/Makefile.in +@@ -1,9 +1,9 @@ +-# Makefile.in generated by automake 1.11.2 from Makefile.am. ++# Makefile.in generated by automake 1.11.1 from Makefile.am. + # @configure_input@ + + # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +-# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +-# Foundation, Inc. ++# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, ++# Inc. + # This Makefile.in is free software; the Free Software Foundation + # gives unlimited permission to copy and/or distribute it, + # with or without modifications, as long as this notice is preserved. +@@ -82,12 +82,6 @@ + am__base_list = \ + sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \ + sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +-am__uninstall_files_from_dir = { \ +- test -z "$$files" \ +- || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \ +- || { echo " ( cd '$$dir' && rm -f" $$files ")"; \ +- $(am__cd) "$$dir" && rm -f $$files; }; \ +- } + am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(pkgconfigdir)" + LTLIBRARIES = $(lib_LTLIBRARIES) + libfftw3@PREC_SUFFIX@_la_DEPENDENCIES = kernel/libkernel.la \ +@@ -133,7 +127,7 @@ + ETAGS = etags + CTAGS = ctags + DIST_SUBDIRS = support genfft kernel simd-support dft rdft reodft api \ +- threads libbench2 . tests mpi doc tools m4 ++ libbench2 . threads tests mpi doc tools m4 + DISTFILES = $(DIST_COMMON) $(DIST_SOURCES) $(TEXINFOS) $(EXTRA_DIST) + distdir = $(PACKAGE)-$(VERSION) + top_distdir = $(distdir) +@@ -169,8 +163,6 @@ + DIST_ARCHIVES = $(distdir).tar.gz + GZIP_ENV = --best + distuninstallcheck_listfiles = find . -type f -print +-am__distuninstallcheck_listfiles = $(distuninstallcheck_listfiles) \ +- | sed 's|^\./|$(prefix)/|' | grep -v '$(infodir)/dir$$' + distcleancheck_listfiles = find . -type f -print + ACLOCAL = @ACLOCAL@ + ALLOCA = @ALLOCA@ +@@ -326,7 +318,7 @@ + @MAINTAINER_MODE_TRUE@GENFFT = genfft + ACLOCAL_AMFLAGS = -I m4 + SUBDIRS = support $(GENFFT) kernel simd-support dft rdft reodft api \ +-threads libbench2 . tests mpi doc tools m4 ++libbench2 . threads tests mpi doc tools m4 + + EXTRA_DIST = COPYRIGHT bootstrap.sh CONVENTIONS fftw.pc.in + SIMD_LIBS = \ +@@ -378,7 +370,7 @@ + $(MAKE) $(AM_MAKEFLAGS) all-recursive + + .SUFFIXES: +-am--refresh: Makefile ++am--refresh: + @: + $(srcdir)/Makefile.in: @MAINTAINER_MODE_TRUE@ $(srcdir)/Makefile.am $(am__configure_deps) + @for dep in $?; do \ +@@ -414,8 +406,10 @@ + $(am__aclocal_m4_deps): + + config.h: stamp-h1 +- @if test ! -f $@; then rm -f stamp-h1; else :; fi +- @if test ! -f $@; then $(MAKE) $(AM_MAKEFLAGS) stamp-h1; else :; fi ++ @if test ! -f $@; then \ ++ rm -f stamp-h1; \ ++ $(MAKE) $(AM_MAKEFLAGS) stamp-h1; \ ++ else :; fi + + stamp-h1: $(srcdir)/config.h.in $(top_builddir)/config.status + @rm -f stamp-h1 +@@ -494,7 +488,9 @@ + @$(NORMAL_UNINSTALL) + @list='$(pkgconfig_DATA)'; test -n "$(pkgconfigdir)" || list=; \ + files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \ +- dir='$(DESTDIR)$(pkgconfigdir)'; $(am__uninstall_files_from_dir) ++ test -n "$$files" || exit 0; \ ++ echo " ( cd '$(DESTDIR)$(pkgconfigdir)' && rm -f" $$files ")"; \ ++ cd "$(DESTDIR)$(pkgconfigdir)" && rm -f $$files + + # This directory's subdirectories are mostly independent; you can cd + # into them and run `make' without going through this Makefile. +@@ -703,7 +699,7 @@ + $(am__remove_distdir) + + dist-bzip2: distdir +- tardir=$(distdir) && $(am__tar) | BZIP2=$${BZIP2--9} bzip2 -c >$(distdir).tar.bz2 ++ tardir=$(distdir) && $(am__tar) | bzip2 -9 -c >$(distdir).tar.bz2 + $(am__remove_distdir) + + dist-lzma: distdir +@@ -711,7 +707,7 @@ + $(am__remove_distdir) + + dist-xz: distdir +- tardir=$(distdir) && $(am__tar) | XZ_OPT=$${XZ_OPT--e} xz -c >$(distdir).tar.xz ++ tardir=$(distdir) && $(am__tar) | xz -c >$(distdir).tar.xz + $(am__remove_distdir) + + dist-tarZ: distdir +@@ -761,7 +757,6 @@ + && am__cwd=`pwd` \ + && $(am__cd) $(distdir)/_build \ + && ../configure --srcdir=.. --prefix="$$dc_install_base" \ +- $(AM_DISTCHECK_CONFIGURE_FLAGS) \ + $(DISTCHECK_CONFIGURE_FLAGS) \ + && $(MAKE) $(AM_MAKEFLAGS) \ + && $(MAKE) $(AM_MAKEFLAGS) dvi \ +@@ -790,16 +785,8 @@ + list='$(DIST_ARCHIVES)'; for i in $$list; do echo $$i; done) | \ + sed -e 1h -e 1s/./=/g -e 1p -e 1x -e '$$p' -e '$$x' + distuninstallcheck: +- @test -n '$(distuninstallcheck_dir)' || { \ +- echo 'ERROR: trying to run $@ with an empty' \ +- '$$(distuninstallcheck_dir)' >&2; \ +- exit 1; \ +- }; \ +- $(am__cd) '$(distuninstallcheck_dir)' || { \ +- echo 'ERROR: cannot chdir into $(distuninstallcheck_dir)' >&2; \ +- exit 1; \ +- }; \ +- test `$(am__distuninstallcheck_listfiles) | wc -l` -eq 0 \ ++ @$(am__cd) '$(distuninstallcheck_dir)' \ ++ && test `$(distuninstallcheck_listfiles) | wc -l` -le 1 \ + || { echo "ERROR: files left after uninstall:" ; \ + if test -n "$(DESTDIR)"; then \ + echo " (check DESTDIR support)"; \ +@@ -833,15 +820,10 @@ + + installcheck: installcheck-recursive + install-strip: +- if test -z '$(STRIP)'; then \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- install; \ +- else \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \ +- fi ++ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ ++ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ ++ `test -z '$(STRIP)' || \ ++ echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install + mostlyclean-generic: + + clean-generic: +--- a/mpi/Makefile.in ++++ b/mpi/Makefile.in +@@ -1,9 +1,9 @@ +-# Makefile.in generated by automake 1.11.2 from Makefile.am. ++# Makefile.in generated by automake 1.11.1 from Makefile.am. + # @configure_input@ + + # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +-# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +-# Foundation, Inc. ++# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, ++# Inc. + # This Makefile.in is free software; the Free Software Foundation + # gives unlimited permission to copy and/or distribute it, + # with or without modifications, as long as this notice is preserved. +@@ -79,16 +79,11 @@ + am__base_list = \ + sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \ + sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +-am__uninstall_files_from_dir = { \ +- test -z "$$files" \ +- || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \ +- || { echo " ( cd '$$dir' && rm -f" $$files ")"; \ +- $(am__cd) "$$dir" && rm -f $$files; }; \ +- } + am__installdirs = "$(DESTDIR)$(libdir)" "$(DESTDIR)$(includedir)" \ + "$(DESTDIR)$(includedir)" + LTLIBRARIES = $(lib_LTLIBRARIES) +-libfftw3@PREC_SUFFIX@_mpi_la_LIBADD = ++libfftw3@PREC_SUFFIX@_mpi_la_DEPENDENCIES = \ ++ ../libfftw3@PREC_SUFFIX@.la + am__objects_1 = any-true.lo api.lo block.lo choose-radix.lo conf.lo \ + dtensor.lo rearrange.lo wisdom-api.lo f03-wrap.lo + am__objects_2 = transpose-alltoall.lo transpose-pairwise.lo \ +@@ -304,6 +299,7 @@ + SRC = any-true.c api.c block.c choose-radix.c conf.c dtensor.c fftw3-mpi.h ifftw-mpi.h rearrange.c wisdom-api.c f03-wrap.c + libfftw3@PREC_SUFFIX@_mpi_la_SOURCES = $(SRC) $(TRANSPOSE_SRC) $(DFT_SRC) $(RDFT_SRC) $(RDFT2_SRC) + libfftw3@PREC_SUFFIX@_mpi_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_mpi_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la @MPILIBS@ + @OPENMP_TRUE@@THREADS_FALSE@mpi_bench_CFLAGS = $(OPENMP_CFLAGS) + @THREADS_TRUE@mpi_bench_CFLAGS = $(PTHREAD_CFLAGS) + @COMBINED_THREADS_FALSE@@THREADS_TRUE@LIBFFTWTHREADS = $(top_builddir)/threads/libfftw3@PREC_SUFFIX@_threads.la +@@ -522,7 +518,9 @@ + @$(NORMAL_UNINSTALL) + @list='$(include_HEADERS)'; test -n "$(includedir)" || list=; \ + files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \ +- dir='$(DESTDIR)$(includedir)'; $(am__uninstall_files_from_dir) ++ test -n "$$files" || exit 0; \ ++ echo " ( cd '$(DESTDIR)$(includedir)' && rm -f" $$files ")"; \ ++ cd "$(DESTDIR)$(includedir)" && rm -f $$files + install-nodist_includeHEADERS: $(nodist_include_HEADERS) + @$(NORMAL_INSTALL) + test -z "$(includedir)" || $(MKDIR_P) "$(DESTDIR)$(includedir)" +@@ -540,7 +538,9 @@ + @$(NORMAL_UNINSTALL) + @list='$(nodist_include_HEADERS)'; test -n "$(includedir)" || list=; \ + files=`for p in $$list; do echo $$p; done | sed -e 's|^.*/||'`; \ +- dir='$(DESTDIR)$(includedir)'; $(am__uninstall_files_from_dir) ++ test -n "$$files" || exit 0; \ ++ echo " ( cd '$(DESTDIR)$(includedir)' && rm -f" $$files ")"; \ ++ cd "$(DESTDIR)$(includedir)" && rm -f $$files + + ID: $(HEADERS) $(SOURCES) $(LISP) $(TAGS_FILES) + list='$(SOURCES) $(HEADERS) $(LISP) $(TAGS_FILES)'; \ +@@ -645,15 +645,10 @@ + + installcheck: installcheck-am + install-strip: +- if test -z '$(STRIP)'; then \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- install; \ +- else \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \ +- fi ++ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ ++ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ ++ `test -z '$(STRIP)' || \ ++ echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install + mostlyclean-generic: + + clean-generic: +--- a/threads/Makefile.in ++++ b/threads/Makefile.in +@@ -1,9 +1,9 @@ +-# Makefile.in generated by automake 1.11.2 from Makefile.am. ++# Makefile.in generated by automake 1.11.1 from Makefile.am. + # @configure_input@ + + # Copyright (C) 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, +-# 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Free Software +-# Foundation, Inc. ++# 2003, 2004, 2005, 2006, 2007, 2008, 2009 Free Software Foundation, ++# Inc. + # This Makefile.in is free software; the Free Software Foundation + # gives unlimited permission to copy and/or distribute it, + # with or without modifications, as long as this notice is preserved. +@@ -75,15 +75,10 @@ + am__base_list = \ + sed '$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;$$!N;s/\n/ /g' | \ + sed '$$!N;$$!N;$$!N;$$!N;s/\n/ /g' +-am__uninstall_files_from_dir = { \ +- test -z "$$files" \ +- || { test ! -d "$$dir" && test ! -f "$$dir" && test ! -r "$$dir"; } \ +- || { echo " ( cd '$$dir' && rm -f" $$files ")"; \ +- $(am__cd) "$$dir" && rm -f $$files; }; \ +- } + am__installdirs = "$(DESTDIR)$(libdir)" + LTLIBRARIES = $(lib_LTLIBRARIES) $(noinst_LTLIBRARIES) +-libfftw3@PREC_SUFFIX@_omp_la_LIBADD = ++libfftw3@PREC_SUFFIX@_omp_la_DEPENDENCIES = \ ++ ../libfftw3@PREC_SUFFIX@.la + am_libfftw3@PREC_SUFFIX@_omp_la_OBJECTS = \ + libfftw3@PREC_SUFFIX@_omp_la-api.lo \ + libfftw3@PREC_SUFFIX@_omp_la-conf.lo \ +@@ -105,7 +100,8 @@ + @COMBINED_THREADS_FALSE@@OPENMP_TRUE@@THREADS_TRUE@ $(libdir) + @OPENMP_TRUE@@THREADS_FALSE@am_libfftw3@PREC_SUFFIX@_omp_la_rpath = \ + @OPENMP_TRUE@@THREADS_FALSE@ -rpath $(libdir) +-libfftw3@PREC_SUFFIX@_threads_la_LIBADD = ++libfftw3@PREC_SUFFIX@_threads_la_DEPENDENCIES = \ ++ ../libfftw3@PREC_SUFFIX@.la + am_libfftw3@PREC_SUFFIX@_threads_la_OBJECTS = \ + libfftw3@PREC_SUFFIX@_threads_la-api.lo \ + libfftw3@PREC_SUFFIX@_threads_la-conf.lo \ +@@ -306,12 +302,14 @@ + + libfftw3@PREC_SUFFIX@_threads_la_CFLAGS = $(PTHREAD_CFLAGS) + libfftw3@PREC_SUFFIX@_threads_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_threads_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la + libfftw3@PREC_SUFFIX@_omp_la_SOURCES = api.c conf.c openmp.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@_omp_la_CFLAGS = $(OPENMP_CFLAGS) + libfftw3@PREC_SUFFIX@_omp_la_LDFLAGS = -version-info @SHARED_VERSION_INFO@ ++libfftw3@PREC_SUFFIX@_omp_la_LIBADD = ../libfftw3@PREC_SUFFIX@.la + all: all-am + + .SUFFIXES: +@@ -668,15 +666,10 @@ + + installcheck: installcheck-am + install-strip: +- if test -z '$(STRIP)'; then \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- install; \ +- else \ +- $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ +- install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ +- "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'" install; \ +- fi ++ $(MAKE) $(AM_MAKEFLAGS) INSTALL_PROGRAM="$(INSTALL_STRIP_PROGRAM)" \ ++ install_sh_PROGRAM="$(INSTALL_STRIP_PROGRAM)" INSTALL_STRIP_FLAG=-s \ ++ `test -z '$(STRIP)' || \ ++ echo "INSTALL_PROGRAM_ENV=STRIPPROG='$(STRIP)'"` install + mostlyclean-generic: + + clean-generic: diff -Nru fftw3-3.3.1/debian/patches/series fftw3-3.3.1/debian/patches/series --- fftw3-3.3.1/debian/patches/series 2011-11-29 01:14:03.000000000 +0100 +++ fftw3-3.3.1/debian/patches/series 2012-03-21 23:09:07.000000000 +0100 @@ -2,3 +2,4 @@ 02_fftw-faq_bfnn.diff 03_fix_manpages.diff 04_improve_semaphore_detection.diff +fix-links.patch diff -Nru fftw3-3.3.1/debian/rules fftw3-3.3.1/debian/rules --- fftw3-3.3.1/debian/rules 2012-03-16 00:03:56.000000000 +0100 +++ fftw3-3.3.1/debian/rules 2012-03-21 22:35:36.000000000 +0100 @@ -60,7 +60,7 @@ SETCFLAGS := CFLAGS='$(CFLAGS)' # common configure options -archconfflags := $(archconfflags) --prefix=/usr --enable-shared --enable-threads --enable-portable-binary --enable-mpi --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) +archconfflags := $(archconfflags) --prefix=/usr --enable-shared --enable-threads --enable-portable-binary --enable-mpi --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) MPILIBS="$(shell mpicc --showme:link)" build-arch: # single precision
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