gbm: Improve documentation of BO import

[mesa.git] / scons / gallium.py

diff --git a/scons/gallium.py b/scons/gallium.py
index aa7201a97159c08914ca72c4792c89a4cc23e56a..61bbeb2399fbf1cd4694b12938455587b764ef6e 100755 (executable)
--- a/scons/gallium.py
+++ b/scons/gallium.py
@@ -279,7 +279,7 @@ def generate(env):
         if env['build'] == 'profile':
             env['debug'] = False
             env['profile'] = True
-        if env['build'] in ('release', 'opt'):
+        if env['build'] == 'release':
             env['debug'] = False
             env['profile'] = False
 
@@ -308,7 +308,20 @@ def generate(env):
     if env.GetOption('num_jobs') <= 1:
         env.SetOption('num_jobs', num_jobs())
 
-    env.Decider('MD5-timestamp')
+    # Speed up dependency checking.  See
+    # - https://github.com/SCons/scons/wiki/GoFastButton
+    # - https://bugs.freedesktop.org/show_bug.cgi?id=109443
+
+    # Scons version string has consistently been in this format:
+    # MajorVersion.MinorVersion.Patch[.alpha/beta.yyyymmdd]
+    # so this formula should cover all versions regardless of type
+    # stable, alpha or beta.
+    # For simplicity alpha and beta flags are removed.
+
+    scons_version = distutils.version.StrictVersion('.'.join(SCons.__version__.split('.')[:3]))
+    if scons_version < distutils.version.StrictVersion('3.0.2') or \
+       scons_version > distutils.version.StrictVersion('3.0.4'):
+        env.Decider('MD5-timestamp')
     env.SetOption('max_drift', 60)
 
     # C preprocessor options
@@ -325,8 +338,6 @@ def generate(env):
         cppdefines += ['NDEBUG']
     if env['build'] == 'profile':
         cppdefines += ['PROFILE']
-    if env['build'] in ('opt', 'profile'):
-        cppdefines += ['VMX86_STATS']
     if env['platform'] in ('posix', 'linux', 'freebsd', 'darwin'):
         cppdefines += [
             '_POSIX_SOURCE',
@@ -477,7 +488,7 @@ def generate(env):
             ccflags += [
                 '/O2', # optimize for speed
             ]
-        if env['build'] in ('release', 'opt'):
+        if env['build'] == 'release':
             if not env['clang']:
                 ccflags += [
                     '/GL', # enable whole program optimization
@@ -588,7 +599,7 @@ def generate(env):
             shlinkflags += ['-Wl,--enable-stdcall-fixup']
             #shlinkflags += ['-Wl,--kill-at']
     if msvc:
-        if env['build'] in ('release', 'opt') and not env['clang']:
+        if env['build'] == 'release' and not env['clang']:
             # enable Link-time Code Generation
             linkflags += ['/LTCG']
             env.Append(ARFLAGS = ['/LTCG'])