setup the flag STDBOOL

set it for both C and C++, since API is in C, while concrete implementaions are in C++

Makefile

@@ -39,7 +39,7 @@ $(RIME_DEPS):
 	$(MAKE) -C librime deps
 
 librime: $(RIME_DEPS)
-	$(MAKE) -C librime release install
+	$(MAKE) -C librime CFLAGS="-DSTDBOOL" CXXFLAGS="-DSTDBOOL" release install
 	$(MAKE) copy-rime-binaries
 
 copy-rime-binaries:

Squirrel-Bridging-Header.h

@@ -2,5 +2,7 @@
 //  Use this file to import your target's public headers that you would like to expose to Swift.
 //
 
+#define STDBOOL
+
 #import <rime_api.h>
 #import <rime/key_table.h>

Squirrel.xcodeproj/project.pbxproj

@@ -619,12 +619,14 @@
 					"$(LIBRARY_SEARCH_PATHS_QUOTED_FOR_TARGET_1)",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
+				OTHER_CFLAGS = "-DSTDBOOL";
 				OTHER_CODE_SIGN_FLAGS = "--deep";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DLEOPARD",
 					"-DHAVE_CONFIG_H",
 					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_2)",
+					"-DSTDBOOL",
 				);
 				OTHER_LDFLAGS = "-lrime.1";
 				PRODUCT_BUNDLE_IDENTIFIER = im.rime.inputmethod.Squirrel;
@@ -673,12 +675,14 @@
 					"$(LIBRARY_SEARCH_PATHS_QUOTED_FOR_TARGET_1)",
 				);
 				MACOSX_DEPLOYMENT_TARGET = 13.0;
+				OTHER_CFLAGS = "-DSTDBOOL";
 				OTHER_CODE_SIGN_FLAGS = "--deep";
 				OTHER_CPLUSPLUSFLAGS = (
 					"-DLEOPARD",
 					"-DHAVE_CONFIG_H",
 					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_1)",
 					"$(OTHER_CPLUSPLUSFLAGS_QUOTED_FOR_TARGET_2)",
+					"-DSTDBOOL",
 				);
 				OTHER_LDFLAGS = "-lrime.1";
 				PRODUCT_BUNDLE_IDENTIFIER = im.rime.inputmethod.Squirrel;