CI: Run boost test for Cygwin

Also, use '^' to escape newlines in appveyor-install.bat to avoid an
absurdly long line, remove some unnecessary quotation, and alphabetically
sort packages

Also, define the _XOPEN_SOURCE feature test macro in the boost test to avoid
'not declared in this scope' warnings for pthread_rwlock_init(), etc.

ci/appveyor-install.bat

@@ -1,5 +1,5 @@
 set CACHE=C:\cache
-set CYGWIN_MIRROR="http://cygwin.mirror.constant.com"
+set CYGWIN_MIRROR=http://cygwin.mirror.constant.com
 
 if _%arch%_ == _x64_ set SETUP=setup-x86_64.exe && set CYGWIN_ROOT=C:\cygwin64
 if _%arch%_ == _x86_ set SETUP=setup-x86.exe && set CYGWIN_ROOT=C:\cygwin
@@ -7,5 +7,13 @@ if _%arch%_ == _x86_ set SETUP=setup-x86.exe && set CYGWIN_ROOT=C:\cygwin
 if not exist %CACHE% mkdir %CACHE%
 
 echo Updating Cygwin and installing ninja and test prerequisites
-%CYGWIN_ROOT%\%SETUP% -qnNdO -R "%CYGWIN_ROOT%" -s "%CYGWIN_MIRROR%" -l "%CACHE%" -g -P "ninja,gcc-objc,gcc-objc++,libglib2.0-devel,zlib-devel,python3-pip"
+%CYGWIN_ROOT%\%SETUP% -qnNdO -R "%CYGWIN_ROOT%" -s "%CYGWIN_MIRROR%" -l "%CACHE%" -g -P ^
+gcc-objc++,^
+gcc-objc,^
+libboost-devel,^
+libglib2.0-devel,^
+ninja,^
+python3-pip,^
+zlib-devel
+
 echo Install done

run_project_tests.py

@@ -486,12 +486,9 @@ def detect_tests_to_run():
     if mesonlib.is_windows():
         # TODO: Set BOOST_ROOT in .appveyor.yml
         gathered_tests += [('framework', ['test cases/frameworks/1 boost'], 'BOOST_ROOT' not in os.environ)]
-    elif mesonlib.is_osx():
+    elif mesonlib.is_osx() or mesonlib.is_cygwin():
         # Just do the BOOST test
         gathered_tests += [('framework', ['test cases/frameworks/1 boost'], False)]
-    elif mesonlib.is_cygwin():
-        # Skip all the framework tests
-        gathered_tests += [('framework', gather_tests('test cases/frameworks'), True)]
     else:
         gathered_tests += [('framework', gather_tests('test cases/frameworks'), False)]
     return gathered_tests

test cases/frameworks/1 boost/extralib.cpp

@@ -1,3 +1,5 @@
+#define _XOPEN_SOURCE 500
+
 #include <iostream>
 #include <boost/log/trivial.hpp>
 #include <boost/log/expressions.hpp>