Updating capnproto bundling code to use CMake and ninja

- Must faster
- Also showing output by default (easier to diagnose errors)
  * ninja has minimal verbosity (unless there are errors)

buildutils/build.py

@@ -2,6 +2,8 @@
 
 import subprocess
 import os
+import shutil
+import sys
 import tempfile
 
 def build_libcapnp(bundle_dir, build_dir, verbose=False):
@@ -11,23 +13,46 @@ def build_libcapnp(bundle_dir, build_dir, verbose=False):
     bundle_dir = os.path.abspath(bundle_dir)
     capnp_dir = os.path.join(bundle_dir, 'capnproto-c++')
     build_dir = os.path.abspath(build_dir)
+    tmp_dir = os.path.join(capnp_dir, 'build')
+    if not os.path.exists(tmp_dir):
+        os.mkdir(tmp_dir)
 
-    with tempfile.TemporaryFile() as f:
-        stdout = f
-        if verbose:
-            stdout = None
-        cxxflags = os.environ.get('CXXFLAGS', None)
-        os.environ['CXXFLAGS'] = (cxxflags or '') + ' -fPIC -O2 -DNDEBUG'
-        conf = subprocess.Popen(['./configure', '--disable-shared', '--prefix', build_dir], cwd=capnp_dir, stdout=stdout)
-        returncode = conf.wait()
-        if returncode != 0:
-            raise RuntimeError('Configure failed')
+    cxxflags = os.environ.get('CXXFLAGS', None)
+    os.environ['CXXFLAGS'] = (cxxflags or '') + ' -O2 -DNDEBUG'
 
-        make = subprocess.Popen(['make', '-j4', 'install'], cwd=capnp_dir, stdout=stdout)
-        returncode = make.wait()
-        if cxxflags is None:
-            del os.environ['CXXFLAGS']
-        else:
-            os.environ['CXXFLAGS'] = cxxflags
-        if returncode != 0:
-            raise RuntimeError('Make failed')
+    # Enable ninja for compilation if available
+    build_type = []
+    if shutil.which('ninja'):
+        build_type = ['-G', 'Ninja']
+
+    # TODO Determine VS version
+
+    args = [
+        'cmake',
+        '-DCMAKE_POSITION_INDEPENDENT_CODE=1',
+        '-DBUILD_TESTING=OFF',
+        '-DBUILD_SHARED_LIBS=OFF',
+        '-DCMAKE_INSTALL_PREFIX:PATH={}'.format(build_dir),
+        capnp_dir,
+    ]
+    args.extend(build_type)
+    conf = subprocess.Popen(args, cwd=tmp_dir, stdout=sys.stdout)
+    returncode = conf.wait()
+    if returncode != 0:
+        raise RuntimeError('CMake failed')
+
+    # Run build through cmake
+    build = subprocess.Popen([
+        'cmake',
+        '--build',
+        '.',
+        '--target',
+        'install',
+    ], cwd=tmp_dir, stdout=sys.stdout)
+    returncode = build.wait()
+    if cxxflags is None:
+        del os.environ['CXXFLAGS']
+    else:
+        os.environ['CXXFLAGS'] = cxxflags
+    if returncode != 0:
+        raise RuntimeError('capnproto compilation failed')