Description: Create shared libraries lib{blas,lapack}.so.3
 * 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. This also gives access to some extra OpenBLAS symbols, in
   order to differentiate it at runtime from other BLAS implementations (see
   #960728).
   The -rpath,'$ORIGIN' is there to ensure that the OpenBLAS flavour used is
   the one selected in the lib{blas,lapack}.so.3 alternative, and not the one
   selected in the libopenblas.so.0 alternative.
 * See also override_dh_shlibdeps in debian/rules
 * Also order the files when calling `ar' or $(CC), to make
   the build reproducible (see #824639)
 * Also link the shared blas and lapack against gomp (see #945791)
Author: Sébastien Villemot <sebastien@debian.org>
Author: Alexis Bienvenüe <pado@passoire.fr>
Author: Mo Zhou <lumin@debian.org>
Forwarded: not-needed
Last-Update: 2020-07-31
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
Index: openblas/interface/Makefile
===================================================================
--- openblas.orig/interface/Makefile
+++ openblas/interface/Makefile
@@ -2468,3 +2468,28 @@ cblas_zgemm_batch.$(SUFFIX) cblas_zgemm_
 delete-duplicate-lapack-objects:
 	if test -d ../lapack-netlib; then cd ../lapack-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.. -lopenblas $(EXTRALIB) $(SH_BLAS_LAPACK_OMP) -Wl,-rpath,'$$ORIGIN'
+
+libblas64.so.3: $(SBLAS1OBJS) $(SBLAS2OBJS) $(SBLAS3OBJS) $(DBLAS1OBJS) $(DBLAS2OBJS) $(DBLAS3OBJS) $(CBLAS1OBJS) $(CBLAS2OBJS) $(CBLAS3OBJS) $(ZBLAS1OBJS) $(ZBLAS2OBJS) $(ZBLAS3OBJS) ../kernel/lsame.o ../kernel/scabs1.o ../kernel/dcabs1.o ../driver/others/xerbla.o
+	$(CC) $(LDFLAGS) -shared -o $@ $^ -Wl,-soname,libblas64.so.3 -L.. -lopenblas64 $(EXTRALIB) $(SH_BLAS_LAPACK_OMP) -Wl,-rpath,'$$ORIGIN'
+
+# 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.. -lopenblas $(EXTRALIB) $(SH_BLAS_LAPACK_OMP) -Wl,-rpath,'$$ORIGIN'
+
+liblapack64.so.3: $(SLAPACKOBJS) $(DLAPACKOBJS) $(CLAPACKOBJS) $(ZLAPACKOBJS) ../kernel/lsame.o ../driver/others/xerbla.o
+	$(CC) $(LDFLAGS) -shared -o $@ $^ `LC_ALL=C ls ../lapack-netlib/*` -Wl,-soname,liblapack64.so.3 -L.. -lopenblas64 $(EXTRALIB) $(SH_BLAS_LAPACK_OMP) -Wl,-rpath,'$$ORIGIN'
+
+clean::
+	rm -f libblas.so.3 liblapack.so.3 libblas64.so.3 liblapack64.so.3