Sync betaflight to Gitea

2026-08-03 16:37:10 +08:00
commit ad3163cf91
4712 changed files with 3301380 additions and 0 deletions
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+###############################################################################
+# Generic preprocessor macro expansion helpers
+#
+# Public interface (pp_*):
+#   pp_def_value(<header.h>, EXPR)       -> expanded EXPR
+#   pp_def_value_str(<header.h>, EXPR)   -> expanded EXPR containing string, unquoting it
+#
+# Notes:
+# - Uses $(CROSS_CC) -E with -imacros to include only the given header's macros.
+# - value_str: merge adjacent strings and remove quotes ("a""b" "B C" -> abB C)
+###############################################################################
+
+_pp_expand_raw = $(strip $(shell \
+  printf '%s' "$2" | \
+  $(CROSS_CC) $(CPPFLAGS) \
+    $(addprefix -D,$(OPTIONS)) \
+    $(addprefix -I,$(INCLUDE_DIRS)) \
+    $(addprefix -isystem,$(SYS_INCLUDE_DIRS)) \
+    -E -P -xc -imacros "$1" - \
+  | tr -d '\r\n' \
+))
+
+# Expand only if the macro NAME is defined in header $1; otherwise yield empty
+# Use octal-escaped '#' so old make (3.81 on macOS) doesn't treat it as a comment.
+_pp_expand_guarded_raw = $(strip $(shell \
+  printf '\043 if defined(%s)\n%s\n\043 endif\n' "$2" "$2" | \
+  $(CROSS_CC) $(CPPFLAGS) \
+    $(addprefix -D,$(OPTIONS)) \
+    $(addprefix -I,$(INCLUDE_DIRS)) \
+    $(addprefix -isystem,$(SYS_INCLUDE_DIRS)) \
+    -E -P -xc -imacros "$1" - \
+  | tr -d '\r\n' \
+))
+
+# Concatenate adjacent strings (C rules) and remove quotes
+# Preprocessor already merged whitespace between tokens
+_pp_quote :="
+_pp_unquote    = $(subst $(_pp_quote),,$(subst " ",,$1))
+
+# Expanded value; empty if macro is not defined
+pp_def_value      = $(call _pp_expand_guarded_raw,$1,$2)
+
+# String values: collapse C string concatenation (" " -> ""), remove quotes
+pp_def_value_str  = $(call _pp_unquote,$(call _pp_expand_guarded_raw,$1,$2))