fix parallel build issues with APFS/HFS+/ext2/3 in netlib-lapack

The problem is that OpenBLAS sets the LAPACKE_LIB and the TMGLIB to the
same object and uses the `ar` feature to update the archive file. If the
underlying filesystem does not have sub-second timestamp resolution and
the system is fast enough (or `ccache` is used), the timestamp of the
builds which should be added to the previously generated archive is the
same as the archive file itself and therefore `make` does not update the
archive.

Since OpenBLAS takes care to not run the different targets updating the
archive in parallel, the easiest solution is to declare the respective
targets `.PHONY`, forcing `make` to always update them.

fixes #1682

Author: dev-zero

lapack-netlib/LAPACKE/src/Makefile

@@ -2454,6 +2454,8 @@ endif
 
 all: ../../$(LAPACKELIB)
 
+.PHONY: ../../$(LAPACKELIB)
+
 ../../$(LAPACKELIB): $(OBJ_A) $(OBJ_B) $(DEPRECATED) $(EXTENDED) $(MATGEN)
 	$(ARCH) $(ARCHFLAGS) $@ $(OBJ_A)
 	$(ARCH) $(ARCHFLAGS) $@ $(OBJ_B)

lapack-netlib/SRC/Makefile

@@ -552,6 +552,8 @@ endif
 
 all: ../$(LAPACKLIB)
 
+.PHONY: ../$(LAPACKLIB)
+
 ../$(LAPACKLIB): $(ALLOBJ) $(ALLXOBJ) $(DEPRECATED)
 	$(ARCH) $(ARCHFLAGS) $@ $(ALLOBJ) $(ALLXOBJ) $(DEPRECATED)
 	$(RANLIB) $@

lapack-netlib/TESTING/MATGEN/Makefile

@@ -57,6 +57,8 @@ all: ../../$(TMGLIB)
 ALLOBJ = $(SMATGEN) $(CMATGEN) $(SCATGEN) $(DMATGEN) $(ZMATGEN) \
 	$(DZATGEN)
 
+.PHONY: ../../$(TMGLIB)
+
 ../../$(TMGLIB): $(ALLOBJ)
 	$(ARCH) $(ARCHFLAGS) $@ $^
 	$(RANLIB) $@