Merge pull request #2745 from dcbaker/submit/haiku

small fixes for haiku

docs/markdown/Reference-tables.md

@@ -56,6 +56,7 @@ These are provided by the `.system()` method call.
 | darwin              | Either OSX or iOS |
 | windows             | Any version of Windows |
 | cygwin              | The Cygwin environment for Windows |
+| haiku               | |
 
 Any string not listed above is not guaranteed to remain stable in
 future releases.

mesonbuild/backend/backends.py

@@ -511,7 +511,7 @@ class Backend:
             # For 'automagic' deps: Boost and GTest. Also dependency('threads').
             # pkg-config puts the thread flags itself via `Cflags:`
             if dep.need_threads():
-                commands += compiler.thread_flags()
+                commands += compiler.thread_flags(self.environment)
         # Fortran requires extra include directives.
         if compiler.language == 'fortran':
             for lt in target.link_targets:

mesonbuild/backend/ninjabackend.py

@@ -2438,7 +2438,7 @@ rule FORTRAN_DEP_HACK
         # pkg-config puts the thread flags itself via `Cflags:`
         for d in target.external_deps:
             if d.need_threads():
-                commands += linker.thread_link_flags()
+                commands += linker.thread_link_flags(self.environment)
         # Only non-static built targets need link args and link dependencies
         if not isinstance(target, build.StaticLibrary):
             commands += target.link_args

mesonbuild/compilers/c.py

@@ -16,9 +16,11 @@ import subprocess, os.path, tempfile
 
 from .. import mlog
 from .. import coredata
-from ..mesonlib import EnvironmentException, version_compare, Popen_safe, listify
-from ..mesonlib import for_windows, for_darwin, for_cygwin
 from . import compilers
+from ..mesonlib import (
+    EnvironmentException, version_compare, Popen_safe, listify,
+    for_windows, for_darwin, for_cygwin, for_haiku,
+)
 
 from .compilers import (
     GCC_MINGW,
@@ -281,12 +283,12 @@ class CCompiler(Compiler):
             # Add compile flags needed by dependencies
             args += d.get_compile_args()
             if d.need_threads():
-                args += self.thread_flags()
+                args += self.thread_flags(env)
             if mode == 'link':
                 # Add link flags needed to find dependencies
                 args += d.get_link_args()
                 if d.need_threads():
-                    args += self.thread_link_flags()
+                    args += self.thread_link_flags(env)
         # Select a CRT if needed since we're linking
         if mode == 'link':
             args += self.get_linker_debug_crt_args()
@@ -781,10 +783,14 @@ class CCompiler(Compiler):
                         return [trial]
         return None
 
-    def thread_flags(self):
+    def thread_flags(self, env):
+        if for_haiku(self.is_cross, env):
+            return []
         return ['-pthread']
 
-    def thread_link_flags(self):
+    def thread_link_flags(self, env):
+        if for_haiku(self.is_cross, env):
+            return []
         return ['-pthread']
 
     def has_multi_arguments(self, args, env):
@@ -1005,10 +1011,10 @@ class VisualStudioCCompiler(CCompiler):
         return []
 
     # FIXME, no idea what these should be.
-    def thread_flags(self):
+    def thread_flags(self, env):
         return []
 
-    def thread_link_flags(self):
+    def thread_link_flags(self, env):
         return []
 
     def get_options(self):

mesonbuild/dependencies/base.py

@@ -634,9 +634,20 @@ class ExternalProgram:
                     # Windows does not ship python3.exe, but we know the path to it
                     if len(commands) > 0 and commands[0] == 'python3':
                         commands = mesonlib.python_command + commands[1:]
+                elif mesonlib.is_haiku():
+                    # Haiku does not have /usr, but a lot of scripts assume that
+                    # /usr/bin/env always exists. Detect that case and run the
+                    # script with the interpreter after it.
+                    if commands[0] == '/usr/bin/env':
+                        commands = commands[1:]
+                    # We know what python3 is, we're running on it
+                    if len(commands) > 0 and commands[0] == 'python3':
+                        commands = mesonlib.python_command + commands[1:]
                 return commands + [script]
-        except Exception:
+        except Exception as e:
+            mlog.debug(e)
             pass
+        mlog.debug('Unusable script {!r}'.format(script))
         return False
 
     def _is_executable(self, path):
@@ -667,21 +678,17 @@ class ExternalProgram:
                         return [trial_ext]
         return False
 
-    def _search(self, name, search_dir):
+    def _search_windows_special_cases(self, name, command):
         '''
-        Search in the specified dir for the specified executable by name
-        and if not found search in PATH
+        Lots of weird Windows quirks:
+        1. PATH search for @name returns files with extensions from PATHEXT,
+           but only self.windows_exts are executable without an interpreter.
+        2. @name might be an absolute path to an executable, but without the
+           extension. This works inside MinGW so people use it a lot.
+        3. The script is specified without an extension, in which case we have
+           to manually search in PATH.
+        4. More special-casing for the shebang inside the script.
         '''
-        commands = self._search_dir(name, search_dir)
-        if commands:
-            return commands
-        # Do a standard search in PATH
-        command = shutil.which(name)
-        if not mesonlib.is_windows():
-            # On UNIX-like platforms, shutil.which() is enough to find
-            # all executables whether in PATH or with an absolute path
-            return [command]
-        # HERE BEGINS THE TERROR OF WINDOWS
         if command:
             # On Windows, even if the PATH search returned a full path, we can't be
             # sure that it can be run directly if it's not a native executable.
@@ -695,7 +702,7 @@ class ExternalProgram:
             commands = self._shebang_to_cmd(command)
             if commands:
                 return commands
-        else:
+            return [None]
         # Maybe the name is an absolute path to a native Windows
         # executable, but without the extension. This is technically wrong,
         # but many people do it because it works in the MinGW shell.
@@ -714,6 +721,22 @@ class ExternalProgram:
                 return commands
         return [None]
 
+    def _search(self, name, search_dir):
+        '''
+        Search in the specified dir for the specified executable by name
+        and if not found search in PATH
+        '''
+        commands = self._search_dir(name, search_dir)
+        if commands:
+            return commands
+        # Do a standard search in PATH
+        command = shutil.which(name)
+        if mesonlib.is_windows():
+            return self._search_windows_special_cases(name, command)
+        # On UNIX-like platforms, shutil.which() is enough to find
+        # all executables whether in PATH or with an absolute path
+        return [command]
+
     def found(self):
         return self.command[0] is not None
 

mesonbuild/linkers.py

@@ -48,7 +48,7 @@ class VisualStudioLinker(StaticLinker):
     def build_rpath_args(self, build_dir, from_dir, rpath_paths, build_rpath, install_rpath):
         return []
 
-    def thread_link_flags(self):
+    def thread_link_flags(self, env):
         return []
 
     def get_option_link_args(self, options):
@@ -100,7 +100,7 @@ class ArLinker(StaticLinker):
     def get_always_args(self):
         return []
 
-    def thread_link_flags(self):
+    def thread_link_flags(self, env):
         return []
 
     def get_option_link_args(self, options):

mesonbuild/mesonlib.py

@@ -292,6 +292,18 @@ def for_darwin(is_cross, env):
         return env.cross_info.config['host_machine']['system'] == 'darwin'
     return False
 
+def for_haiku(is_cross, env):
+    """
+    Host machine is Haiku?
+
+    Note: 'host' is the machine on which compiled binaries will run
+    """
+    if not is_cross:
+        return is_haiku()
+    elif env.cross_info.has_host():
+        return env.cross_info.config['host_machine']['system'] == 'haiku'
+    return False
+
 def exe_exists(arglist):
     try:
         p = subprocess.Popen(arglist, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

test cases/common/140 get define/meson.build

@@ -16,6 +16,9 @@ foreach lang : ['c', 'cpp']
   elif host_system == 'cygwin'
     d = cc.get_define('__CYGWIN__')
     assert(d == '1', '__CYGWIN__ value is @0@ instead of 1'.format(d))
+  elif host_system == 'haiku'
+    d = cc.get_define('__HAIKU__')
+    assert(d == '1', '__HAIKU__ value is @0@ instead of 1'.format(d))
   else
     error('Please report a bug and help us improve support for this platform')
   endif