start exploring ios compilation

core/Makefile

@@ -26,6 +26,12 @@ ifdef CONFIG_WINDOWS
 LOADABLE_EXTENSION=dll
 endif
 
+ifdef BUILD_FOR_IOS
+CI_MAYBE_TARGET=aarch64-apple-ios
+rs_build_flags = -Zbuild-std
+sysroot_option = --sysroot=/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk
+endif
+
 prefix=./dist
 dbg_prefix=./dbg
 
@@ -137,11 +143,14 @@ $(TARGET_LOADABLE): $(prefix) $(ext_files) $(rs_lib_loadable_cpy)
 	$(CC) -O2 -I./src/ -I./src/sqlite \
 	$(LOADABLE_CFLAGS) \
 	$(C_TARGET) \
+	$(sysroot_option) \
 	$(ext_files) $(rs_lib_loadable_cpy) -o $@
 
 $(TARGET_DBG_LOADABLE): $(dbg_prefix) $(ext_files) $(rs_lib_dbg_loadable_cpy)
 	$(CC) -g -I./src/ -I./src/sqlite \
 	$(LOADABLE_CFLAGS) \
+	$(C_TARGET) \
+	$(sysroot_option) \
 	$(ext_files) $(rs_lib_dbg_loadable_cpy) -o $@
 
 # Build a SQLite CLI that pre-loads cr-sqlite.

notes.md

@@ -1,3 +1,25 @@
+# ios
+
+https://mozilla.github.io/firefox-browser-architecture/experiments/2017-09-06-rust-on-ios.html
+cargo install cargo-lipo
+^-- https://github.com/TimNN/cargo-lipo/issues/60
+https://www.reddit.com/r/rust/comments/12w9h4s/how_to_make_armv7appleios_target_by_myself/
+
+```
+cargo build -Zbuild-std --target=aarch64-apple-ios --features static,omit_load_extension
+```
+
+```
+export CI_MAYBE_TARGET=aarch64-apple-ios
+make loadable
+clang: warning: using sysroot for 'MacOSX' but targeting 'iPhone' [-Wincompatible-sysroot]
+```
+
+^- repeat for every ios arch? How to universal binary?
+
+https://stackoverflow.com/questions/823706/compiling-custom-sqlite-for-an-iphone-app
+https://github.com/swiftlyfalling/SQLiteLib
+
 # Prepared read
 
 - parse values and use correct types for binding