basic macOS support

I don't have a Mac to test on, but the knowledge that there is basic
support for macOS is still nice.

4 files changed, 9 insertions, 6 deletions

diff --git a/.github/workflows/basic.yml b/.github/workflows/basic.yml
index 545dc28..f7d8fc5 100644
--- a/.github/workflows/basic.yml
+++ b/.github/workflows/basic.yml
@@ -21,7 +21,7 @@ jobs:
   os:
     strategy:
       matrix:
-        os: [ubuntu-18.04, ubuntu-20.04, windows-2016, windows-2019]
+        os: [ubuntu-18.04, ubuntu-20.04, windows-2016, windows-2019, macos-10.15, macos-11]
         include:
           - boost-version: 1.72.0
     runs-on: '${{ matrix.os }}'
diff --git a/project/boost/build.py b/project/boost/build.py
index a192585..fd73b6e 100644
--- a/project/boost/build.py
+++ b/project/boost/build.py
@@ -101,7 +101,7 @@ class BuildParameters:
                     logging.warning("Cannot link the runtime statically to a dynamic library, going to link dynamically")
                     runtime_link = Linkage.SHARED
                 elif on_linux_like():
-                    logging.warning("Cannot link to the GNU C Library (which is assumed) statically, going to link dynamically")
+                    logging.warning("Cannot link to the GNU C Library or BSD libc (which are assumed) statically, going to link dynamically")
                     runtime_link = Linkage.SHARED
             yield link, runtime_link
 
diff --git a/project/os.py b/project/os.py
index eaa63db..cb5bd44 100644
--- a/project/os.py
+++ b/project/os.py
@@ -11,6 +11,7 @@ class OS(Enum):
     WINDOWS = 'Windows'
     LINUX = 'Linux'
     CYGWIN = 'Cygwin'
+    MACOS = 'macOS'
 
     def __str__(self):
         return str(self.value)
@@ -22,6 +23,8 @@ class OS(Enum):
             return OS.WINDOWS
         if system == 'Linux':
             return OS.LINUX
+        if system == 'Darwin':
+            return OS.MACOS
         if system.startswith('CYGWIN_NT'):
             return OS.CYGWIN
         raise NotImplementedError(f'unsupported OS: {system}')
@@ -42,7 +45,7 @@ def on_linux():
 
 def on_linux_like():
     os = OS.current()
-    return os is OS.LINUX or os is OS.CYGWIN
+    return os is OS.LINUX or os is OS.CYGWIN or os is OS.MACOS
 
 
 def on_cygwin():
diff --git a/project/utils.py b/project/utils.py
index 39dfb0d..6697ff7 100644
--- a/project/utils.py
+++ b/project/utils.py
@@ -13,7 +13,7 @@ import sys
 import tempfile
 import time
 
-from project.os import on_cygwin, on_linux
+import project.os
 
 
 def normalize_path(s):
@@ -25,7 +25,7 @@ def mkdir_parent(path):
 
 
 def full_exe_name(exe):
-    if on_linux():
+    if not project.os.on_windows_like():
         # There's no PATHEXT on Linux.
         return exe
     # b2 on Windows/Cygwin doesn't like it when the executable name doesn't
@@ -34,7 +34,7 @@ def full_exe_name(exe):
     path = shutil.which(exe, path=dir_path)
     if not path:
         raise RuntimeError(f"executable '{exe}' could not be found")
-    if on_cygwin():
+    if project.os.on_cygwin():
         # On Cygwin, shutil.which('gcc') == '/usr/bin/gcc' and shutil.which('gcc.exe')
         # == '/usr/bin/gcc.exe'; we want the latter version.  shutil.which('clang++')
         # == '/usr/bin/clang++' is fine though, since it _is_ the complete path