dev-python/h5py: Fix skipping inconvenient types on x86

Closes: https://bugs.gentoo.org/782238
Signed-off-by: Michał Górny <mgorny@gentoo.org>

dev-python/h5py/files/h5py-3.2.1-i686-types.patch

@@ -0,0 +1,55 @@
+From 76c9c8c4049943c490556fa888cf7743d1a677e5 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Micha=C5=82=20G=C3=B3rny?= <mgorny@gentoo.org>
+Date: Mon, 12 Apr 2021 11:48:16 +0200
+Subject: [PATCH] TST: Skip problematic datatypes based on their length
+
+Filter datatypes for tests based on their length rather than keeping
+a list of illegal platform+type combinations.  This is more robust
+than the previous solution and fixes the test failures with new numpy
+versions (1.19.5 is the oldest I have tested) that declare 'float96'
+and 'complex192' on i686 rather than 'float128' and 'complex256'.
+
+This fixes the following test failure:
+
+    E       AttributeError: module 'numpy' has no attribute 'float128'
+
+plus, later on (again):
+
+    E   TypeError: Illegal length 24 for complex dtype
+---
+ h5py/tests/test_dtype.py | 12 +++---------
+ 1 file changed, 3 insertions(+), 9 deletions(-)
+
+diff --git a/h5py/tests/test_dtype.py b/h5py/tests/test_dtype.py
+index c5fac97e..ec4eda21 100644
+--- a/h5py/tests/test_dtype.py
++++ b/h5py/tests/test_dtype.py
+@@ -13,8 +13,6 @@ except ImportError:
+ 
+ from .common import ut, TestCase
+ 
+-UNSUPPORTED_LONG_DOUBLE = ('i386', 'i486', 'i586', 'i686', 'ppc64le')
+-
+ 
+ class TestVlen(TestCase):
+ 
+@@ -289,13 +287,9 @@ class TestOffsets(TestCase):
+                      if (np.issubdtype(f, np.floating) or
+                          np.issubdtype(f, np.complexfloating)))
+ 
+-        if platform.machine() in UNSUPPORTED_LONG_DOUBLE:
+-            dtype_dset_map = {str(j): d
+-                              for j, d in enumerate(dtypes)
+-                              if d not in (np.float128, np.complex256)}
+-        else:
+-            dtype_dset_map = {str(j): d
+-                              for j, d in enumerate(dtypes)}
++        dtype_dset_map = {str(j): d
++                          for j, d in enumerate(dtypes)
++                          if d().nbytes in [4, 8, 16, 32]}
+ 
+         fname = self.mktemp()
+ 
+-- 
+2.31.1
+

dev-python/h5py/h5py-3.2.1.ebuild

@@ -45,6 +45,10 @@ distutils_enable_sphinx docs \
 #	use mpi && export CC=mpicc
 #}
 
+PATCHES=(
+	"${FILESDIR}"/h5py-3.2.1-i686-types.patch
+)
+
 python_prepare_all() {
 	# avoid pytest-mpi dep, we do not use mpi anyway
 	sed -i -e 's:pytest-mpi::' pytest.ini || die