Use correct shared library naming for Cygwin

Use correct shared library naming for Cygwin when building and installing

mesonbuild/build.py

@@ -21,7 +21,7 @@ from . import mlog
 from .mesonlib import File, MesonException
 from .mesonlib import flatten, stringlistify, classify_unity_sources
 from .mesonlib import get_filenames_templates_dict, substitute_values
-from .environment import for_windows, for_darwin
+from .environment import for_windows, for_darwin, for_cygwin
 from .compilers import is_object, clike_langs, sort_clike, lang_suffixes
 
 known_basic_kwargs = {'install': True,
@@ -1120,6 +1120,18 @@ class SharedLibrary(BuildTarget):
                 self.filename_tpl = '{0.prefix}{0.name}-{0.soversion}.{0.suffix}'
             else:
                 self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
+        elif for_cygwin(is_cross, env):
+            suffix = 'dll'
+            self.gcc_import_filename = 'lib{0}.dll.a'.format(self.name)
+            # Shared library is of the form cygfoo.dll
+            # (ld --dll-search-prefix=cyg is the default)
+            prefix = 'cyg'
+            # Import library is called libfoo.dll.a
+            self.import_filename = self.gcc_import_filename
+            if self.soversion:
+                self.filename_tpl = '{0.prefix}{0.name}-{0.soversion}.{0.suffix}'
+            else:
+                self.filename_tpl = '{0.prefix}{0.name}.{0.suffix}'
         elif for_darwin(is_cross, env):
             prefix = 'lib'
             suffix = 'dylib'

mesonbuild/environment.py

@@ -158,7 +158,10 @@ def detect_cpu(compilers):
     return trial
 
 def detect_system():
-    return platform.system().lower()
+    system = platform.system().lower()
+    if system.startswith('cygwin'):
+        return 'cygwin'
+    return system
 
 
 def for_windows(is_cross, env):
@@ -173,6 +176,20 @@ def for_windows(is_cross, env):
         return env.cross_info.config['host_machine']['system'] == 'windows'
     return False
 
+
+def for_cygwin(is_cross, env):
+    """
+    Host machine is cygwin?
+
+    Note: 'host' is the machine on which compiled binaries will run
+    """
+    if not is_cross:
+        return mesonlib.is_cygwin()
+    elif env.cross_info.has_host():
+        return env.cross_info.config['host_machine']['system'] == 'cygwin'
+    return False
+
+
 def for_darwin(is_cross, env):
     """
     Host machine is Darwin (iOS/OS X)?
@@ -257,6 +274,11 @@ class Environment:
             self.exe_suffix = 'exe'
             self.object_suffix = 'obj'
             self.win_libdir_layout = True
+        elif (not cross and mesonlib.is_cygwin()) \
+                or (cross and self.cross_info.has_host() and self.cross_info.config['host_machine']['system'] == 'cygwin'):
+            self.exe_suffix = 'exe'
+            self.object_suffix = 'o'
+            self.win_libdir_layout = True
         else:
             self.exe_suffix = ''
             self.object_suffix = 'o'

run_project_tests.py

@@ -31,6 +31,7 @@ import xml.etree.ElementTree as ET
 import time
 import multiprocessing
 import concurrent.futures as conc
+import re
 
 from mesonbuild.coredata import backendlist
 
@@ -208,12 +209,18 @@ def get_relative_files_list_from_dir(fromdir):
             paths.append(path)
     return paths
 
-def platform_fix_exe_name(fname):
-    if not fname.endswith('?exe'):
-        return fname
+def platform_fix_name(fname):
+    if '?lib' in fname:
+        if mesonlib.is_cygwin():
+            fname = re.sub(r'\?lib(.*)\.dll$', r'cyg\1.dll', fname)
+        else:
+            fname = re.sub(r'\?lib', 'lib', fname)
+
+    if fname.endswith('?exe'):
         fname = fname[:-4]
         if mesonlib.is_windows():
             return fname + '.exe'
+
     return fname
 
 def validate_install(srcdir, installdir):
@@ -230,7 +237,7 @@ def validate_install(srcdir, installdir):
     elif os.path.exists(info_file):
         with open(info_file) as f:
             for line in f:
-                expected[platform_fix_exe_name(line.strip())] = False
+                expected[platform_fix_name(line.strip())] = False
     # Check if expected files were found
     for fname in expected:
         if os.path.exists(os.path.join(installdir, fname)):

test cases/windows/7 mingw dll versioning/installed_files.txt

@@ -1,8 +1,8 @@
-usr/bin/libsome-0.dll
+usr/bin/?libsome-0.dll
 usr/lib/libsome.dll.a
-usr/bin/libnoversion.dll
+usr/bin/?libnoversion.dll
 usr/lib/libnoversion.dll.a
-usr/bin/libonlyversion-1.dll
+usr/bin/?libonlyversion-1.dll
 usr/lib/libonlyversion.dll.a
-usr/bin/libonlysoversion-5.dll
+usr/bin/?libonlysoversion-5.dll
 usr/lib/libonlysoversion.dll.a