Software are rebuilt automatically with change of version

Until now, when you changed the version of a software in an already-built
system, its tarball would be downloaded, but it wouldn't actually
build. The only way would be to force the build by deleting the main target
of that file (under `.local/version-info/TYPE/PROGRAM'). This was because
the tarballs were an order-only prerequisite which was implemented some
time ago based on some theoretical argument that if the tarball dates
changes, the software should not be rebuilt (because we check the
checksum).

However, the problems this causes are more than those it solves: Users may
forget to delete the main target of the program and mistakenly think that
they are using the new version. The fact that all the numbers going into
the paper also contain this number further hides this.

With this commit, tarballs are no longer order-only and any time a version
of a software is updated, it will be automatically built and not cause
confusion and manual intervention by the users. As a result of this change,
I also had to correct the way we find the tarball from the list of
prerequisites.

1 files changed, 78 insertions, 76 deletions

diff --git a/reproduce/software/make/high-level.mk b/reproduce/software/make/high-level.mk
index eccc073..21cc4ea 100644
--- a/reproduce/software/make/high-level.mk
+++ b/reproduce/software/make/high-level.mk
@@ -401,14 +401,14 @@ $(tarballs): $(tdir)/%: | $(lockdir)
 # build it because it will complain about the version of libtool, so until
 # the version 0.11.0 of log4cxx, we'll have to run `autogen.sh' on the
 # unpacked source also.
-$(ibidir)/apachelog4cxx: | $(ibidir)/automake \
-                           $(tdir)/apachelog4cxx-$(apachelog4cxx-version).tar.lz
+$(ibidir)/apachelog4cxx: $(ibidir)/automake \
+                         $(tdir)/apachelog4cxx-$(apachelog4cxx-version).tar.lz
 
 	pdir=apachelog4cxx-$(apachelog4cxx-version)
 	rm -rf $(ddir)/$$pdir
 	topdir=$(pwd)
 	cd $(ddir)
-	tar xf $(word 1,$(filter $(tdir)/%,$|))
+	tar xf $(word 1,$(filter $(tdir)/%,$^))
 	cd $$pdir
 	./autogen.sh \
 	&& ./configure SHELL=$(ibdir)/bash --prefix=$(idir) \
@@ -419,12 +419,12 @@ $(ibidir)/apachelog4cxx: | $(ibidir)/automake \
 	&& cd $$topdir \
 	&& echo "Apache log4cxx $(apachelog4cxx-version)" > $@
 
-$(ibidir)/apr: | $(tdir)/apr-$(apr-version).tar.gz
+$(ibidir)/apr: $(tdir)/apr-$(apr-version).tar.gz
 	$(call gbuild, apr-$(apr-version), ,--disable-static) \
 	&& echo "Apache Portable Runtime $(apr-version)" > $@
 
 $(ibidir)/apr-util: $(ibidir)/apr \
-                    | $(tdir)/apr-util-$(apr-util-version).tar.gz
+                    $(tdir)/apr-util-$(apr-util-version).tar.gz
 	$(call gbuild, apr-util-$(apr-util-version), , \
 	               --disable-static \
 	               --with-apr=$(idir) \
@@ -432,8 +432,8 @@ $(ibidir)/apr-util: $(ibidir)/apr \
 	               --with-crypto ) \
 	&& echo "Apache Portable Runtime Utility $(apr-util-version)" > $@
 
-$(ibidir)/atlas: | $(tdir)/atlas-$(atlas-version).tar.bz2 \
-	           $(tdir)/lapack-$(lapack-version).tar.gz
+$(ibidir)/atlas: $(tdir)/atlas-$(atlas-version).tar.bz2 \
+                 $(tdir)/lapack-$(lapack-version).tar.gz
 
         # Get the operating system specific features (how to get
         # CPU frequency and the library suffixes). To make the steps
@@ -514,12 +514,12 @@ $(ibidir)/atlas: | $(tdir)/atlas-$(atlas-version).tar.bz2 \
 
 # Boost doesn't use the standard GNU Build System.
 $(ibidir)/boost: $(ibidir)/openmpi \
-                 | $(ibidir)/python \
-                   $(tdir)/boost-$(boost-version).tar.gz
+                 $(ibidir)/python \
+                 $(tdir)/boost-$(boost-version).tar.gz
 	vstr=$$(echo $(boost-version) | sed -e's/\./_/g')
 	rm -rf $(ddir)/boost_$$vstr
 	topdir=$(pwd); cd $(ddir);
-	tar xf $(word 1,$(filter $(tdir)/%,$|)) \
+	tar xf $(word 1,$(filter $(tdir)/%,$^)) \
 	&& cd boost_$$vstr \
 	&& ./bootstrap.sh --prefix=$(idir) --with-libraries=all \
 	                  --with-python=python3 \
@@ -531,13 +531,13 @@ $(ibidir)/boost: $(ibidir)/openmpi \
 	&& echo "Boost $(boost-version)" > $@
 
 $(ibidir)/cfitsio: $(ibidir)/curl \
-                   | $(tdir)/cfitsio-$(cfitsio-version).tar.gz
+                   $(tdir)/cfitsio-$(cfitsio-version).tar.gz
 
         # CFITSIO hard-codes '@rpath' inside the shared library on
         # Mac systems. So we need to change it to our library
         # installation path. It doesn't affect GNU/Linux, so we'll
         # just do it in any case to keep things clean.
-	topdir=$(pwd); cd $(ddir); tar xf $(word 1,$(filter $(tdir)/%,$|))
+	topdir=$(pwd); cd $(ddir); tar xf $(word 1,$(filter $(tdir)/%,$^))
 	customtar=cfitsio-$(cfitsio-version)-custom.tar.gz
 	cd cfitsio-$(cfitsio-version)
 	sed configure -e's|@rpath|$(ildir)|g' > configure_tmp
@@ -560,7 +560,7 @@ $(ibidir)/cfitsio: $(ibidir)/curl \
 $(ibidir)/cairo: $(ibidir)/freetype \
                  $(ibidir)/libpng \
                  $(ibidir)/pixman \
-                 | $(tdir)/cairo-$(cairo-version).tar.xz
+                 $(tdir)/cairo-$(cairo-version).tar.xz
 	$(call gbuild, cairo-$(cairo-version), static, \
 	               --with-x=no, -j$(numthreads) V=1) \
 	&& echo "Cairo $(cairo-version)" > $@
@@ -568,20 +568,20 @@ $(ibidir)/cairo: $(ibidir)/freetype \
 # Eigen is just headers! So it doesn't need to be compiled. Once unpacked
 # it has a checksum after `eigen-eigen', so we'll just use a `*' to choose
 # the unpacked directory.
-$(ibidir)/eigen: | $(tdir)/eigen-$(eigen-version).tar.gz
+$(ibidir)/eigen: $(tdir)/eigen-$(eigen-version).tar.gz
 	rm -rf $(ddir)/eigen-eigen-*
-	topdir=$(pwd); cd $(ddir); tar xf $(word 1,$(filter $(tdir)/%,$|))
+	topdir=$(pwd); cd $(ddir); tar xf $(word 1,$(filter $(tdir)/%,$^))
 	cd eigen-eigen-*
 	cp -r Eigen $(iidir)/eigen3 \
 	&& cd $$topdir \
 	&& rm -rf $(ddir)/eigen-eigen-* \
 	&& echo "Eigen $(eigen-version)" > $@
 
-$(ibidir)/expat: | $(tdir)/expat-$(expat-version).tar.lz
+$(ibidir)/expat: $(tdir)/expat-$(expat-version).tar.lz
 	$(call gbuild, expat-$(expat-version), static) \
 	&& echo "Expat $(expat-version)" > $@
 
-$(ibidir)/fftw: | $(tdir)/fftw-$(fftw-version).tar.gz
+$(ibidir)/fftw: $(tdir)/fftw-$(fftw-version).tar.gz
         # FFTW's single and double precission libraries must be built
         # independently: for the the single-precision library, we need to
         # add the `--enable-float' option. We will build this first, then
@@ -596,16 +596,16 @@ $(ibidir)/fftw: | $(tdir)/fftw-$(fftw-version).tar.gz
 
 # Freetype is necessary to install matplotlib
 $(ibidir)/freetype: $(ibidir)/libpng \
-                    | $(tdir)/freetype-$(freetype-version).tar.gz
+                    $(tdir)/freetype-$(freetype-version).tar.gz
 	$(call gbuild, freetype-$(freetype-version), static) \
 	&& echo "FreeType $(freetype-version)" > $@
 
-$(ibidir)/gsl: | $(tdir)/gsl-$(gsl-version).tar.gz
+$(ibidir)/gsl: $(tdir)/gsl-$(gsl-version).tar.gz
 	$(call gbuild, gsl-$(gsl-version), static) \
 	&& echo "GNU Scientific Library $(gsl-version)" > $@
 
 $(ibidir)/hdf5: $(ibidir)/openmpi \
-                | $(tdir)/hdf5-$(hdf5-version).tar.gz
+                $(tdir)/hdf5-$(hdf5-version).tar.gz
 	export CC=mpicc; \
 	export FC=mpif90; \
 	$(call gbuild, hdf5-$(hdf5-version), static, \
@@ -629,10 +629,10 @@ else
 healpix-python-dep = $(ipydir)/matplotlib $(ipydir)/astropy
 endif
 $(ibidir)/healpix: $(ibidir)/cfitsio \
+                   $(ibidir)/autoconf \
+                   $(ibidir)/automake \
                    $(healpix-python-dep) \
-                   | $(ibidir)/autoconf \
-                     $(ibidir)/automake \
-                     $(tdir)/healpix-$(healpix-version).tar.gz
+                   $(tdir)/healpix-$(healpix-version).tar.gz
 	if [ x"$(healpix-python-dep)" = x ]; then
 	   pycommand1="echo no-healpy-because-no-other-python"
 	   pycommand2="echo no-healpy-because-no-other-python"
@@ -642,7 +642,7 @@ $(ibidir)/healpix: $(ibidir)/cfitsio \
 	fi
 	rm -rf $(ddir)/Healpix_$(healpix-version)
 	topdir=$(pwd); cd $(ddir);
-	tar xf $(word 1,$(filter $(tdir)/%,$|))
+	tar xf $(word 1,$(filter $(tdir)/%,$^))
 	&& cd Healpix_$(healpix-version)/src/C/autotools/ \
 	&& autoreconf --install \
 	&& ./configure --prefix=$(idir) \
@@ -661,30 +661,30 @@ $(ibidir)/healpix: $(ibidir)/cfitsio \
 	&& cp $(dtexdir)/healpix.tex $(ictdir)/ \
 	&& echo "HEALPix $(healpix-version) \citep{healpix}" > $@
 
-$(ibidir)/libjpeg: | $(tdir)/jpegsrc.$(libjpeg-version).tar.gz
+$(ibidir)/libjpeg: $(tdir)/jpegsrc.$(libjpeg-version).tar.gz
 	$(call gbuild, jpeg-9b, static,,V=1) \
 	&& echo "Libjpeg $(libjpeg-version)" > $@
 
 $(ibidir)/libnsl: $(ibidir)/libtirpc \
                   $(ibidir)/rpcsvc-proto \
-                  | $(tdir)/libnsl-$(libnsl-version).tar.gz
+                  $(tdir)/libnsl-$(libnsl-version).tar.gz
 	$(call gbuild, libnsl-$(libnsl-version), static, \
 	               --sysconfdir=$(idir)/etc) \
 	&& echo "Libnsl $(libnsl-version)" > $@
 
-$(ibidir)/libpng: | $(tdir)/libpng-$(libpng-version).tar.xz
+$(ibidir)/libpng: $(tdir)/libpng-$(libpng-version).tar.xz
 	$(call gbuild, libpng-$(libpng-version), static) \
 	&& echo "Libpng $(libpng-version)" > $@
 
 $(ibidir)/libtiff: $(ibidir)/libjpeg \
-                   | $(tdir)/tiff-$(libtiff-version).tar.gz
+                   $(tdir)/tiff-$(libtiff-version).tar.gz
 	$(call gbuild, tiff-$(libtiff-version), static, \
 	               --disable-jbig \
 	               --disable-webp \
 	               --disable-zstd) \
 	&& echo "Libtiff $(libtiff-version)" > $@
 
-$(ibidir)/libtirpc: | $(tdir)/libtirpc-$(libtirpc-version).tar.bz2
+$(ibidir)/libtirpc: $(tdir)/libtirpc-$(libtirpc-version).tar.bz2
 	$(call gbuild, libtirpc-$(libtirpc-version), static, \
 	               --disable-gssapi, V=1) \
 	echo "libtirpc $(libtirpc-version)" > $@
@@ -700,12 +700,12 @@ $(ibidir)/libxml2: | $(tdir)/libxml2-$(libxml2-version).tar.gz
 	               --without-python)                       \
 	&& echo "Libxml2 $(libxml2-version)" > $@
 
-$(ibidir)/openblas: | $(tdir)/openblas-$(openblas-version).tar.gz
+$(ibidir)/openblas: $(tdir)/openblas-$(openblas-version).tar.gz
 	if [ x$(on_mac_os) = xyes ]; then \
 	  export CC=clang; \
 	fi; \
 	cd $(ddir) \
-	&& tar xf $(word 1,$(filter $(tdir)/%,$|)) \
+	&& tar xf $(word 1,$(filter $(tdir)/%,$^)) \
 	&& cd OpenBLAS-$(openblas-version) \
 	&& make \
 	&& make PREFIX=$(idir) install \
@@ -713,7 +713,7 @@ $(ibidir)/openblas: | $(tdir)/openblas-$(openblas-version).tar.gz
 	&& rm -rf OpenBLAS-$(openblas-version) \
 	&& echo "OpenBLAS $(openblas-version)" > $@
 
-$(ibidir)/openmpi: | $(tdir)/openmpi-$(openmpi-version).tar.gz
+$(ibidir)/openmpi: $(tdir)/openmpi-$(openmpi-version).tar.gz
 	$(call gbuild, openmpi-$(openmpi-version), static, , \
 	               -j$(numthreads) V=1) \
 	&& echo "Open MPI $(openmpi-version)" > $@
@@ -723,7 +723,7 @@ $(ibidir)/openmpi: | $(tdir)/openmpi-$(openmpi-version).tar.gz
 # within the project because of all the security issues it may cause. Only
 # enable/build it in a project with caution, and if there is no other
 # solution (for example to disable SSH in a program that may ask for it.
-$(ibidir)/openssh: | $(tdir)/openssh-$(openssh-version).tar.gz
+$(ibidir)/openssh: $(tdir)/openssh-$(openssh-version).tar.gz
 	$(call gbuild, openssh-$(openssh-version), static, \
 	               --with-privsep-path=$(ibdir)/.ssh_privsep \
 	               --with-privsep-user=nobody \
@@ -732,22 +732,22 @@ $(ibidir)/openssh: | $(tdir)/openssh-$(openssh-version).tar.gz
 	               , -j$(numthreads) V=1) \
 	&& echo "OpenSSH $(openssh-version)" > $@
 
-$(ibidir)/pixman: | $(tdir)/pixman-$(pixman-version).tar.gz
+$(ibidir)/pixman: $(tdir)/pixman-$(pixman-version).tar.gz
 	$(call gbuild, pixman-$(pixman-version), static, , \
 	                   -j$(numthreads) V=1) \
 	&& echo "Pixman $(pixman-version)" > $@
 
-$(ibidir)/rpcsvc-proto: | $(tdir)/rpcsvc-proto-$(rpcsvc-proto-version).tar.xz
+$(ibidir)/rpcsvc-proto: $(tdir)/rpcsvc-proto-$(rpcsvc-proto-version).tar.xz
 	$(call gbuild, rpcsvc-proto-$(rpcsvc-proto-version), static) \
 	&& echo "rpcsvc $(rpcsvc-proto-version)" > $@
 
-$(ibidir)/tides: | $(tdir)/tides-$(tides-version).tar.gz
+$(ibidir)/tides: $(tdir)/tides-$(tides-version).tar.gz
 	$(call gbuild, tides-$(tides-version), static,\
 	               --with-gmp=$(idir) --with-mpfr=$(idir)) \
 	&& cp $(dtexdir)/tides.tex $(ictdir)/ \
 	&& echo "TIDES $(tides-version) \citep{tides}" > $@
 
-$(ibidir)/yaml: | $(tdir)/yaml-$(yaml-version).tar.gz
+$(ibidir)/yaml: $(tdir)/yaml-$(yaml-version).tar.gz
 	$(call gbuild, yaml-$(yaml-version), static) \
 	&& echo "LibYAML $(yaml-version)" > $@
 
@@ -777,8 +777,8 @@ $(ibidir)/yaml: | $(tdir)/yaml-$(yaml-version).tar.gz
 # that it uses if it can't find libiconv on macOS. So, to fix this problem
 # it is necessary to use the option `-DUSE_ICONV=OFF` in the configure step.
 $(ibidir)/libgit2: $(ibidir)/curl \
-                   | $(ibidir)/cmake \
-                     $(tdir)/libgit2-$(libgit2-version).tar.gz
+                   $(ibidir)/cmake \
+                   $(tdir)/libgit2-$(libgit2-version).tar.gz
 	$(call cbuild, libgit2-$(libgit2-version), static, \
 	              -DUSE_SSH=OFF -DBUILD_CLAR=OFF \
 	              -DTHREADSAFE=ON -DUSE_ICONV=OFF ) \
@@ -789,7 +789,7 @@ $(ibidir)/libgit2: $(ibidir)/curl \
 	&& echo "Libgit2 $(libgit2-version)" > $@
 
 $(ibidir)/wcslib: $(ibidir)/cfitsio \
-                  | $(tdir)/wcslib-$(wcslib-version).tar.bz2
+                  $(tdir)/wcslib-$(wcslib-version).tar.bz2
 	$(call gbuild, wcslib-$(wcslib-version), , \
 	               LIBS="-pthread -lcurl -lm" \
                        --with-cfitsiolib=$(ildir) \
@@ -825,14 +825,14 @@ $(ibidir)/astrometrynet: $(ibidir)/gsl \
                          $(ibidir)/wcslib \
                          $(ibidir)/cfitsio \
                          $(ibidir)/libjpeg \
-                         | $(tdir)/astrometry.net-$(astrometrynet-version).tar.gz
+                         $(tdir)/astrometry.net-$(astrometrynet-version).tar.gz
         # We are modifying the Makefile in two steps because on Mac OS
         # system we do not have `/proc/cpuinfo' nor `free'. Since this is
         # only for the `report.txt', this changes do not causes problems in
         # running `astrometrynet'
 	cd $(ddir) \
 	&& rm -rf astrometry.net-$(astrometrynet-version) \
-	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$|)); then \
+	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$^)); then \
 	      echo; echo "Tar error"; exit 1; \
 	   fi \
 	&& cd astrometry.net-$(astrometrynet-version) \
@@ -848,17 +848,17 @@ $(ibidir)/astrometrynet: $(ibidir)/gsl \
 	&& cp $(dtexdir)/astrometrynet.tex $(ictdir)/ \
 	&& echo "Astrometry.net $(astrometrynet-version) \citep{astrometrynet}" > $@
 
-$(ibidir)/autoconf: | $(tdir)/autoconf-$(autoconf-version).tar.lz
+$(ibidir)/autoconf: $(tdir)/autoconf-$(autoconf-version).tar.lz
 	$(call gbuild, autoconf-$(autoconf-version), static, ,V=1) \
 	&& echo "GNU Autoconf $(autoconf-version)" > $@
 
-$(ibidir)/automake: | $(ibidir)/autoconf \
-                      $(tdir)/automake-$(automake-version).tar.gz
+$(ibidir)/automake: $(ibidir)/autoconf \
+                    $(tdir)/automake-$(automake-version).tar.gz
 	$(call gbuild, automake-$(automake-version), static, ,V=1) \
 	&& echo "GNU Automake $(automake-version)" > $@
 
-$(ibidir)/bison: | $(ibidir)/help2man \
-                   $(tdir)/bison-$(bison-version).tar.xz
+$(ibidir)/bison: $(ibidir)/help2man \
+                 $(tdir)/bison-$(bison-version).tar.xz
 	$(call gbuild, bison-$(bison-version), static, ,V=1) \
 	&& echo "GNU Bison $(bison-version)" > $@
 
@@ -869,9 +869,9 @@ $(ibidir)/bison: | $(ibidir)/help2man \
 # programs are scripts and we need to touch them before installing.
 # Otherwise this software will be re-built each time the configure step is
 # invoked.
-$(ibidir)/cdsclient: | $(tdir)/cdsclient-$(cdsclient-version).tar.gz
+$(ibidir)/cdsclient: $(tdir)/cdsclient-$(cdsclient-version).tar.gz
 	cd $(ddir) \
-	&& tar xf $(word 1,$(filter $(tdir)/%,$|)) \
+	&& tar xf $(word 1,$(filter $(tdir)/%,$^)) \
 	&& cd cdsclient-$(cdsclient-version) \
 	&& touch * \
 	&& ./configure --prefix=$(idir) \
@@ -883,7 +883,7 @@ $(ibidir)/cdsclient: | $(tdir)/cdsclient-$(cdsclient-version).tar.gz
 
 # CMake can be built with its custom `./bootstrap' script.
 $(ibidir)/cmake: $(ibidir)/curl \
-                 | $(tdir)/cmake-$(cmake-version).tar.gz
+                 $(tdir)/cmake-$(cmake-version).tar.gz
         # After searching in `bootstrap', I couldn't find `LIBS', only
         # `LDFLAGS'. So the extra libraries are being added to `LDFLAGS',
         # not `LIBS'.
@@ -896,7 +896,7 @@ $(ibidir)/cmake: $(ibidir)/curl \
 	fi; \
 	cd $(ddir) \
 	&& rm -rf cmake-$(cmake-version) \
-	&& tar xf $(word 1,$(filter $(tdir)/%,$|)) \
+	&& tar xf $(word 1,$(filter $(tdir)/%,$^)) \
 	&& cd cmake-$(cmake-version) \
 	&& ./bootstrap --prefix=$(idir) --system-curl --system-zlib \
 	               --system-bzip2 --system-liblzma --no-qt-gui \
@@ -908,18 +908,18 @@ $(ibidir)/cmake: $(ibidir)/curl \
 	&& echo "CMake $(cmake-version)" > $@
 
 $(ibidir)/flex: $(ibidir)/bison \
-                | $(tdir)/flex-$(flex-version).tar.gz
+                $(tdir)/flex-$(flex-version).tar.gz
 	$(call gbuild, flex-$(flex-version), static, ,V=1) \
 	&& echo "Flex $(flex-version)" > $@
 
-$(ibidir)/gdb: | $(ibidir)/python \
-                 $(tdir)/gdb-$(gdb-version).tar.gz
+$(ibidir)/gdb: $(ibidir)/python \
+               $(tdir)/gdb-$(gdb-version).tar.gz
 	$(call gbuild, gdb-$(gdb-version),,,V=1) \
 	&& echo "GNU Project Debugger (GDB) $(gdb-version)" > $@
 
 $(ibidir)/ghostscript: $(ibidir)/libpng \
                        $(ibidir)/libtiff \
-                       | $(tdir)/ghostscript-$(ghostscript-version).tar.gz
+                       $(tdir)/ghostscript-$(ghostscript-version).tar.gz
         # First we need to make sure some necessary X11 libraries that we
         # don't yet install in this template are present on the host
         # system, see https://savannah.nongnu.org/task/?15481 .
@@ -965,7 +965,7 @@ $(ibidir)/gnuastro: $(ibidir)/gsl \
                     $(ibidir)/libtiff \
                     $(ibidir)/libgit2 \
                     $(ibidir)/ghostscript \
-                    | $(tdir)/gnuastro-$(gnuastro-version).tar.lz
+                    $(tdir)/gnuastro-$(gnuastro-version).tar.lz
 ifeq ($(static_build),yes)
 	staticopts="--enable-static=yes --enable-shared=no";
 endif
@@ -974,14 +974,14 @@ endif
 	&& cp $(dtexdir)/gnuastro.tex $(ictdir)/ \
 	&& echo "GNU Astronomy Utilities $(gnuastro-version) \citep{gnuastro}" > $@
 
-$(ibidir)/help2man: | $(tdir)/help2man-$(help2man-version).tar.xz
+$(ibidir)/help2man: $(tdir)/help2man-$(help2man-version).tar.xz
 	$(call gbuild, help2man-$(help2man-version), static, ,V=1) \
 	&& echo "Help2man $(Help2man-version)" > $@
 
 $(ibidir)/imagemagick: $(ibidir)/zlib \
                        $(ibidir)/libjpeg \
                        $(ibidir)/libtiff \
-                       | $(tdir)/imagemagick-$(imagemagick-version).tar.xz
+                       $(tdir)/imagemagick-$(imagemagick-version).tar.xz
 	$(call gbuild, ImageMagick-$(imagemagick-version), static, \
 		       --without-x --disable-openmp, V=1 -j$(numthreads)) \
 	&& echo "ImageMagick $(imagemagick-version)" > $@
@@ -999,11 +999,11 @@ $(ibidir)/imfit: $(ibidir)/gsl \
                  $(ibidir)/fftw \
                  $(ibidir)/scons \
                  $(ibidir)/cfitsio \
-                 | $(tdir)/imfit-$(imfit-version).tar.gz
+                 $(tdir)/imfit-$(imfit-version).tar.gz
 	cd $(ddir) \
 	&& unpackdir=imfit-$(imfit-version) \
 	&& rm -rf $$unpackdir \
-	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$|)); then \
+	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$^)); then \
 	      echo; echo "Tar error"; exit 1; \
 	   fi \
 	&& cd $$unpackdir \
@@ -1042,12 +1042,12 @@ $(ibidir)/imfit: $(ibidir)/gsl \
 # About deleting the final crypt.h file after installation, see
 # https://bugzilla.redhat.com/show_bug.cgi?id=1424609
 $(ibidir)/minizip: $(ibidir)/automake \
-                   | $(tdir)/zlib-$(zlib-version).tar.gz
+                   $(tdir)/zlib-$(zlib-version).tar.gz
 	cd $(ddir) \
 	&& unpackdir=minizip-$(minizip-version) \
 	&& rm -rf $$unpackdir \
 	&& mkdir $$unpackdir \
-	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$|)) \
+	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$^)) \
 	            -C$$unpackdir --strip-components=1; then \
 	      echo; echo "Tar error"; exit 1; \
 	   fi \
@@ -1070,7 +1070,7 @@ $(ibidir)/minizip: $(ibidir)/automake \
 	&& rm -rf $$unpackdir \
 	&& echo "Minizip $(minizip-version)" > $@
 
-$(ibidir)/missfits: | $(tdir)/missfits-$(missfits-version).tar.gz
+$(ibidir)/missfits: $(tdir)/missfits-$(missfits-version).tar.gz
 	$(call gbuild, missfits-$(missfits-version), static) \
 	&& cp $(dtexdir)/missfits.tex $(ictdir)/ \
 	&& echo "MissFITS $(missfits-version) \citep{missfits}" > $@
@@ -1086,7 +1086,7 @@ $(ibidir)/netpbm: $(ibidir)/unzip \
                   $(ibidir)/libjpeg \
                   $(ibidir)/libtiff \
                   $(ibidir)/libxml2 \
-                  | $(tdir)/netpbm-$(netpbm-version).tar.gz
+                  $(tdir)/netpbm-$(netpbm-version).tar.gz
 	if [ x$(on_mac_os) = xyes ]; then \
 	  answers='\n\n$(ildir)\n\n\n\n\n\n$(ildir)/include\n\n$(ildir)/include\n\n$(ildir)/include\nnone\n\n'; \
 	else \
@@ -1095,7 +1095,7 @@ $(ibidir)/netpbm: $(ibidir)/unzip \
 	cd $(ddir) \
 	&& unpackdir=netpbm-$(netpbm-version) \
 	&& rm -rf $$unpackdir \
-	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$|)); then \
+	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$^)); then \
 	      echo; echo "Tar error"; exit 1; \
 	   fi \
 	&& cd $$unpackdir \
@@ -1113,7 +1113,7 @@ $(ibidir)/netpbm: $(ibidir)/unzip \
 $(ibidir)/R: $(ibidir)/libpng \
              $(ibidir)/libjpeg \
              $(ibidir)/libtiff \
-             | $(tdir)/R-$(R-version).tar.gz
+             $(tdir)/R-$(R-version).tar.gz
 	export R_SHELL=$(SHELL); \
 	$(call gbuild, R-$(R-version), static, \
                        --without-x --with-readline \
@@ -1128,7 +1128,7 @@ $(ibidir)/R: $(ibidir)/libpng \
 $(ibidir)/scamp: $(ibidir)/fftw \
                  $(ibidir)/openblas \
                  $(ibidir)/cdsclient \
-                 | $(tdir)/scamp-$(scamp-version).tar.lz
+                 $(tdir)/scamp-$(scamp-version).tar.lz
 	$(call gbuild, scamp-$(scamp-version), static, \
                    --enable-threads --enable-openblas \
                    --with-fftw-libdir=$(idir) \
@@ -1140,12 +1140,12 @@ $(ibidir)/scamp: $(ibidir)/fftw \
 
 # Since `scons' doesn't use the traditional GNU installation with
 # `configure' and `make' it is installed manually using `python'.
-$(ibidir)/scons: | $(ibidir)/python \
-                   $(tdir)/scons-$(scons-version).tar.gz
+$(ibidir)/scons: $(ibidir)/python \
+                 $(tdir)/scons-$(scons-version).tar.gz
 	cd $(ddir) \
 	&& unpackdir=scons-$(scons-version) \
 	&& rm -rf $$unpackdir \
-	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$|)); then \
+	&& if ! tar xf $(word 1,$(filter $(tdir)/%,$^)); then \
 	      echo; echo "Tar error"; exit 1; \
 	   fi \
 	&& cd $$unpackdir \
@@ -1158,7 +1158,7 @@ $(ibidir)/scons: | $(ibidir)/python \
 # the configuration step.
 $(ibidir)/sextractor: $(ibidir)/fftw \
                       $(ibidir)/openblas \
-                      | $(tdir)/sextractor-$(sextractor-version).tar.lz
+                      $(tdir)/sextractor-$(sextractor-version).tar.lz
 	$(call gbuild, sextractor-$(sextractor-version), static, \
 	               --enable-threads --enable-openblas \
 	               --with-openblas-libdir=$(ildir) \
@@ -1168,13 +1168,13 @@ $(ibidir)/sextractor: $(ibidir)/fftw \
 	&& echo "SExtractor $(sextractor-version) \citep{sextractor}" > $@
 
 $(ibidir)/swarp: $(ibidir)/fftw \
-                 | $(tdir)/swarp-$(swarp-version).tar.gz
+                 $(tdir)/swarp-$(swarp-version).tar.gz
 	$(call gbuild, swarp-$(swarp-version), static, \
                        --enable-threads) \
 	&& cp $(dtexdir)/swarp.tex $(ictdir)/ \
 	&& echo "SWarp $(swarp-version) \citep{swarp}" > $@
 
-$(ibidir)/swig: | $(tdir)/swig-$(swig-version).tar.gz
+$(ibidir)/swig: $(tdir)/swig-$(swig-version).tar.gz
         # Option --without-pcre was a suggestion once the configure step
         # was tried and it failed. It was not recommended but it works!
         # pcr is a dependency of swig
@@ -1184,7 +1184,7 @@ $(ibidir)/swig: | $(tdir)/swig-$(swig-version).tar.gz
 $(ibidir)/xlsxio: $(ibidir)/cmake \
                   $(ibidir)/expat \
                   $(ibidir)/minizip \
-                  | $(tdir)/xlsxio-$(xlsxio-version).tar.gz
+                  $(tdir)/xlsxio-$(xlsxio-version).tar.gz
 	if [ x$(on_mac_os) = xyes ]; then \
 	  export CC=clang; \
 	  export CXX=clang++; \
@@ -1240,7 +1240,7 @@ tlmirror=http://mirrors.rit.edu/CTAN/systems/texlive/tlnet
 
 # The core TeX Live system.
 $(itidir)/texlive-ready-tlmgr: reproduce/software/config/texlive.conf \
-                               | $(tdir)/install-tl-unx.tar.gz
+                               $(tdir)/install-tl-unx.tar.gz
 
         # Unpack, enter the directory, and install based on the given
         # configuration (prerequisite of this rule).
@@ -1324,7 +1324,9 @@ $(itidir)/texlive: reproduce/software/config/texlive-packages.conf \
 	  ln -fs $(idir)/texlive/maneage/bin/*/* $(ibdir)/
 
           # Get all the necessary versions.
-	  texlive=$$(pdflatex --version | awk 'NR==1' | sed 's/.*(\(.*\))/\1/' \
+	  texlive=$$(pdflatex --version \
+	                      | awk 'NR==1' \
+	                      | sed 's/.*(\(.*\))/\1/' \
 	                      | awk '{print $$NF}');
 
           # Package names and versions. Note that all TeXLive packages