SCons : Add "scu_limit" argument

"scu_limit" allows specifying the maximum number of includes in a single SCU file (translation unit). A lower limit (e.g. 8) uses less RAM during compilation, but may be slower to compile.

1 files changed, 12 insertions, 11 deletions

diff --git a/scu_builders.py b/scu_builders.py
index 5f7821655b..e76a58bd88 100644
--- a/scu_builders.py
+++ b/scu_builders.py
@@ -8,8 +8,8 @@ from os.path import normpath, basename
 base_folder_path = str(Path(__file__).parent) + "/"
 base_folder_only = os.path.basename(os.path.normpath(base_folder_path))
 _verbose = False
-_is_release_build = False
 _scu_folders = set()
+_max_includes_per_scu = 1024
 
 
 def clear_out_existing_files(output_folder, extension):
@@ -197,13 +197,14 @@ def process_folder(folders, sought_exceptions=[], includes_per_scu=0, extension=
 
     # adjust number of output files according to whether DEV or release
     num_output_files = 1
-    if _is_release_build:
-        # always have a maximum in release
-        includes_per_scu = 8
-        num_output_files = max(math.ceil(total_lines / float(includes_per_scu)), 1)
+
+    if includes_per_scu == 0:
+        includes_per_scu = _max_includes_per_scu
     else:
-        if includes_per_scu > 0:
-            num_output_files = max(math.ceil(total_lines / float(includes_per_scu)), 1)
+        if includes_per_scu > _max_includes_per_scu:
+            includes_per_scu = _max_includes_per_scu
+
+    num_output_files = max(math.ceil(total_lines / float(includes_per_scu)), 1)
 
     lines_per_file = math.ceil(total_lines / float(num_output_files))
     lines_per_file = max(lines_per_file, 1)
@@ -241,15 +242,15 @@ def process_folder(folders, sought_exceptions=[], includes_per_scu=0, extension=
         )
 
 
-def generate_scu_files(verbose, is_release_build):
+def generate_scu_files(verbose, max_includes_per_scu):
     print("=============================")
     print("Single Compilation Unit Build")
     print("=============================")
-    print("Generating SCU build files")
     global _verbose
     _verbose = verbose
-    global _is_release_build
-    _is_release_build = is_release_build
+    global _max_includes_per_scu
+    _max_includes_per_scu = max_includes_per_scu
+    print("Generating SCU build files... (max includes per scu " + str(_max_includes_per_scu) + ")")
 
     curr_folder = os.path.abspath("./")