Create shared libraries lib{blas,lapack}.so.3

Modified: Mo Zhou <lumin@debian.org>
Bugs-Debian: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=824639
Forwarded: not-needed
Last-Update: 2019-10-22

* It is done so that duplicate code with libopenblas.so.0 is kept as low as
  possible. Only the symbols from the external BLAS/LAPACK API are incorporated
  in the shared libraries. The rest is obtained by dynamic linking against
  libopenblas.so.0.
* Also Order the files when calling `ar' or $(CC), to make
  the build reproducible. (order-files.patch)
* Also link the shared blas and lapack against gomp. (Closes: #945791)
Last-Update: 2019-10-22
Gbp-Pq: Name shared-blas-lapack.patch

diff --git a/interface/Makefile b/interface/Makefile
index 377e343dcf4e69a741b20490d1a5eab27857b10c..993f6d3c73bfdc4372374eb9eab4894fca629bbc 100644 (file)
--- a/interface/Makefile
+++ b/interface/Makefile
@@ -2226,3 +2226,28 @@ delete-duplicate-lapack-objects:
                && rm $(SLAPACKOBJS) $(DLAPACKOBJS) $(CLAPACKOBJS) $(ZLAPACKOBJS) lsame.o xerbla.o; fi
        if test -d ../lapack64-netlib; then cd ../lapack64-netlib \
                && rm $(SLAPACKOBJS) $(DLAPACKOBJS) $(CLAPACKOBJS) $(ZLAPACKOBJS) lsame.o xerbla.o; fi
+
+shared-blas-lapack: libblas.so.3 liblapack.so.3
+shared-blas64-lapack64: libblas64.so.3 liblapack64.so.3
+ifneq (0,$(USE_OPENMP))
+SH_BLAS_LAPACK_OMP=-fopenmp -lgomp
+endif
+
+# The list of prerequisite is created by comparing with NETLIB BLAS public API.
+# The symbol cblas_xerbla is missing here, but it does not seem to be provided
+# by libopenblas.so.0 either.
+libblas.so.3: $(SBLAS1OBJS) $(SBLAS2OBJS) $(SBLAS3OBJS) $(DBLAS1OBJS) $(DBLAS2OBJS) $(DBLAS3OBJS) $(CBLAS1OBJS) $(CBLAS2OBJS) $(CBLAS3OBJS) $(ZBLAS1OBJS) $(ZBLAS2OBJS) $(ZBLAS3OBJS) ../kernel/lsame.o ../kernel/scabs1.o ../kernel/dcabs1.o ../driver/others/xerbla.o
+       $(CC) $(LDFLAGS) -shared -o $@ $^ -Wl,-soname,libblas.so.3 -L.. -l:$(shell ls -1 ../libopenblas*.a | head -n1 | xargs basename) $(EXTRALIB) $(SH_BLAS_LAPACK_OMP)
+
+libblas64.so.3: $(SBLAS1OBJS) $(SBLAS2OBJS) $(SBLAS3OBJS) $(DBLAS1OBJS) $(DBLAS2OBJS) $(DBLAS3OBJS) $(CBLAS1OBJS) $(CBLAS2OBJS) $(CBLAS3OBJS) $(ZBLAS1OBJS) $(ZBLAS2OBJS) $(ZBLAS3OBJS) ../kernel/lsame.o ../kernel/scabs1.o ../kernel/dcabs1.o ../driver/others/xerbla.o
+       $(CC) $(LDFLAGS) -shared -o $@ $^ -Wl,-soname,libblas64.so.3 -L.. -l:$(shell ls -1 ../libopenblas64*.a | head -n1 | xargs basename) $(EXTRALIB) $(SH_BLAS_LAPACK_OMP)
+
+# The prerequisites must match the symbols deleted in target delete-duplicate-lapack-objects
+liblapack.so.3: $(SLAPACKOBJS) $(DLAPACKOBJS) $(CLAPACKOBJS) $(ZLAPACKOBJS) ../kernel/lsame.o ../driver/others/xerbla.o
+       $(CC) $(LDFLAGS) -shared -o $@ $^ `LC_ALL=C ls ../lapack-netlib/*` -Wl,-soname,liblapack.so.3 -L.. -l:$(shell ls -1 ../libopenblas*.a | head -n1 | xargs basename) $(EXTRALIB) $(SH_BLAS_LAPACK_OMP)
+
+liblapack64.so.3: $(SLAPACKOBJS) $(DLAPACKOBJS) $(CLAPACKOBJS) $(ZLAPACKOBJS) ../kernel/lsame.o ../driver/others/xerbla.o
+       $(CC) $(LDFLAGS) -shared -o $@ $^ `LC_ALL=C ls ../lapack64-netlib/*` -Wl,-soname,liblapack64.so.3 -L.. -l:$(shell ls -1 ../libopenblas64*.a | head -n1 | xargs basename) $(EXTRALIB) $(SH_BLAS_LAPACK_OMP)
+
+clean::
+       rm -f libblas.so.3 liblapack.so.3