build systems: uniformize git_sha1.h generation

[mesa.git] / src / SConscript

diff --git a/src/SConscript b/src/SConscript
index cf6db730da24c4c3725068ede845848df71d00ef..5e1171b5246b08e53960197a3ef3aaf5e9596628 100644 (file)
--- a/src/SConscript
+++ b/src/SConscript
@@ -1,12 +1,76 @@
+import filecmp
+import os
+import subprocess
+
 Import('*')
 
-SConscript('glsl/SConscript')
+if env['platform'] == 'windows':
+    SConscript('getopt/SConscript')
+
+SConscript('util/SConscript')
+SConscript('compiler/SConscript')
+
+if env['hostonly']:
+    # We are just compiling the things necessary on the host for cross
+    # compilation
+    Return()
+
+
+def write_git_sha1_h_file(filename):
+    """Mesa looks for a git_sha1.h file at compile time in order to display
+    the current git hash id in the GL_VERSION string.  This function tries
+    to retrieve the git hashid and write the header file.  An empty file
+    will be created if anything goes wrong."""
+
+    tempfile = "git_sha1.h.tmp"
+    with open(tempfile, "w") as f:
+        args = [ 'sh', Dir('#').abspath + '/git_sha1_gen.sh' ]
+        try:
+            subprocess.Popen(args, stdout=f)
+        except:
+            print "Warning: exception in write_git_sha1_h_file()"
+            return
+
+    if not os.path.exists(filename) or not filecmp.cmp(tempfile, filename):
+        # The filename does not exist or it's different from the new file,
+        # so replace old file with new.
+        if os.path.exists(filename):
+            os.remove(filename)
+        os.rename(tempfile, filename)
+    return
+
+
+# Create the git_sha1.h header file
+write_git_sha1_h_file("git_sha1.h")
+# and update CPPPATH so the git_sha1.h header can be found
+env.Append(CPPPATH = ["#" + env['build_dir']])
+
+
+
+if env['platform'] != 'windows':
+    SConscript('loader/SConscript')
+
+# When env['gles'] is set, the targets defined in mapi/glapi/SConscript are not
+# used.  libgl-xlib and libgl-gdi adapt themselves to use the targets defined
+# in mapi/glapi-shared/SConscript.  mesa/SConscript also adapts itself to
+# enable OpenGL ES support.
+SConscript('mapi/glapi/gen/SConscript')
+SConscript('mapi/glapi/SConscript')
+
+# Haiku C++ libGL dispatch (renderers depend on libgl)
+if env['platform'] in ['haiku']:
+    SConscript('hgl/SConscript')
+
+SConscript('mesa/SConscript')
+
+if not env['embedded']:
+    if env['platform'] not in ('cygwin', 'darwin', 'freebsd', 'haiku', 'windows'):
+        SConscript('glx/SConscript')
+    if env['platform'] == 'haiku':
+        SConscript('egl/SConscript')
 
-if 'mesa' in env['statetrackers']:
-    SConscript('mesa/SConscript')
+    if env['gles']:
+        SConscript('mapi/shared-glapi/SConscript')
 
 SConscript('gallium/SConscript')
 
-if platform != 'embedded':
-    SConscript('glut/glx/SConscript')
-    SConscript('glew/SConscript')