Adding manylinux2010 github action

- Validates that the manylinux2010 environment can build pycapnp
- Handle lib and lib64 cases
- Has patch for aligned_alloc symbol (not available prior to glibc 2.16)
https://github.com/capnproto/capnproto/issues/743
- Fixes #197
- Should be ready to prepare a v1.0.0b1 release

.github/workflows/manylinux2010.yml

@@ -0,0 +1,26 @@
+name: manylinux2010
+
+on: [push, pull_request]
+
+jobs:
+  manylinux2010:
+
+    runs-on: ubuntu-latest
+    container: ${{ matrix.container-image }}
+    strategy:
+      matrix:
+          python-version: ['cp37-cp37m', 'cp38-cp38']
+          container-image: ['quay.io/pypa/manylinux2010_x86_64', 'quay.io/pypa/manylinux2010_i686']
+
+    steps:
+    - uses: actions/checkout@v1
+    # capnproto build requires cmake 3+, CentOS 6 (manylinux2010) defaults to cmake 2.8
+    - name: Install dependencies
+      run: |
+        yum install -y cmake3 ninja-build
+        ln -sf /usr/bin/cmake3 /usr/local/bin/cmake
+        ln -s /usr/bin/ninja-build /usr/local/bin/ninja
+        /opt/python/${{ matrix.python-version }}/bin/python -m pip install -r requirements.txt
+    - name: Build pycapnp and install
+      run: |
+        /opt/python/${{ matrix.python-version }}/bin/python setup.py build

buildutils/bundle.py

@@ -11,6 +11,7 @@
 # for original project.
 
 
+import fileinput
 import os
 import shutil
 import tarfile
@@ -91,3 +92,14 @@ def fetch_libcapnp(savedir, url=None):
     else:
         cpp_dir = os.path.join(with_version, 'c++')
         shutil.move(cpp_dir, dest)
+
+    # XXX (HaaTa): There's a bug in capnproto-0.7.0 on CentOS 6 (or any glibc older than 2.16)
+    #              This patches the issue
+    with fileinput.FileInput(os.path.join(dest, 'src', 'kj', 'table.c++'), inplace=True, backup='.bak') as f:
+        for line in f:
+            print(
+                line.replace(
+                    '__APPLE__ || __BIONIC__', '__APPLE__ || __BIONIC__ || (defined(__GLIBC__) && (__GLIBC__ == 2) && (__GLIBC_MINOR__ < 16))'
+                ),
+                end=''
+            )

setup.py

@@ -119,6 +119,7 @@ class build_libcapnp_ext(build_ext_c):
             capnp_executable = find_executable("capnp")
             if capnp_executable:
                 self.include_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'include')]
+                self.library_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'lib{}'.format(8 * struct.calcsize("P")))]
                 self.library_dirs += [os.path.join(os.path.dirname(capnp_executable), '..', 'lib')]
 
             # Try to autodetect presence of library. Requires compile/run
@@ -156,6 +157,7 @@ class build_libcapnp_ext(build_ext_c):
                 info("capnproto already built at {}".format(build_dir))
 
             self.include_dirs += [os.path.join(build_dir, 'include')]
+            self.library_dirs += [os.path.join(build_dir, 'lib{}'.format(8 * struct.calcsize("P")))]
             self.library_dirs += [os.path.join(build_dir, 'lib')]
 
         return build_ext_c.run(self)