component/openblas: build for multiple targets with runtime detection of the target CPU.

component/openblas/buildout.cfg

@@ -15,23 +15,21 @@ patch-options = -p0
 patches =
   ${:_profile_base_location_}/disable_openmp_if_single_core.patch#ee553ccaf9dd4bc37374588e49956f62
 
-build-common-options = BINARY="$(uname -m | grep -q x86_64 && echo 64 || echo 32)" NO_STATIC=1 USE_OPENMP=1 USE_THREAD=1
+build-common-options = NO_STATIC=1 USE_OPENMP=1 USE_THREAD=1 DYNAMIC_ARCH=1
 
-# You can specify more options with openblas:build-ext-options parameter.
+# We build for multiple targets with runtime detection of the target CPU but
+# you can specify more options with openblas:build-ext-options parameter.
 # Example :
-# * to build generic binary that supports multiple architecture in one binary
-#   DYNAMIC_ARCH=1
-# * to specify target explicitly
-#   (see https://github.com/xianyi/OpenBLAS/blob/v0.2.15/TargetList.txt )
+# * to specify the oldest model you expect to encounter
+#   (see https://github.com/xianyi/OpenBLAS/blob/v0.2.18/TargetList.txt )
 #   TARGET=HASWELL
 build-ext-options =
 
 # Fortran is required for LAPACK, which is required for matplotlib.
 pre-configure = type gfortran
 
-# First try with auto-detected target and if it fails try TARGET=GENERIC.
 configure-command =
-  make ${:build-common-options} ${:build-ext-options} || (make -j1 clean && make ${:build-common-options} TARGET=GENERIC)
+  make ${:build-common-options} ${:build-ext-options}
 make-options =
   dummy
 make-targets =