only build OpenCV with IPP support on x86_64 systems

[edmondac]

This is a small change to exclude trying to build OpenCV using the Intel Integrated Performance Primitives on non-X86 systems.

[edmondac]

Without whitespace changes, it just looks like this:

diff --git a/easybuild/easyblocks/o/opencv.py b/easybuild/easyblocks/o/opencv.py
index 1660b92..c6f95d5 100644
--- a/easybuild/easyblocks/o/opencv.py
+++ b/easybuild/easyblocks/o/opencv.py
@@ -38,7 +38,7 @@ from easybuild.tools.build_log import EasyBuildError
 from easybuild.tools.config import build_option
 from easybuild.tools.filetools import compute_checksum, copy
 from easybuild.tools.modules import get_software_libdir, get_software_root
-from easybuild.tools.systemtools import get_cpu_features, get_shared_lib_ext
+from easybuild.tools.systemtools import X86_64, get_cpu_architecture, get_cpu_features, get_shared_lib_ext
 from easybuild.tools.toolchain.compiler import OPTARCH_GENERIC
 
 
@@ -68,6 +68,8 @@ class EB_OpenCV(CMakeMake):
 
         self.pylibdir = det_pylibdir()
 
+        if get_cpu_architecture() == X86_64:
+            # IPP are Intel's Integrated Performance Primitives - so only make sense on X86_64
             ippicv_tgz = glob.glob(os.path.join(self.builddir, 'ippicv*.tgz'))
             if ippicv_tgz:
                 if len(ippicv_tgz) == 1:
@@ -85,7 +87,8 @@ class EB_OpenCV(CMakeMake):
                     if LooseVersion(self.version) >= LooseVersion('3.4.4'):
                         self.cfg.update('configopts', '-DOPENCV_DOWNLOAD_PATH=%s' % self.builddir)
                 else:
-                raise EasyBuildError("Found multiple ippicv*.tgz source tarballs in %s: %s", self.builddir, ippicv_tgz)
+                    raise EasyBuildError("Found multiple ippicv*.tgz source tarballs in %s: %s",
+                                         self.builddir, ippicv_tgz)
 
     def configure_step(self):
         """Custom configuration procedure for OpenCV."""

[boegel]

lgtm

[boegel]

Tested and approved, sorry for the holdup on this one @edmondac!