Makefile: Use project-local build directory

Set 'DerivedData' path in `xcodebuild` to give us a local build
directory.

Doing this because when the 'Debug', or 'Release' directories in
'Build/Products/' don't exist, Make doesn't build our recipes. Make
seems to prefer local files, and I don't imagine the wildcard in the
path does us any favours.

When I changed the DerivedData path, I ended up with this error:

    In file included from DomeKey/DomeKey/HeadphoneKey.m:9:
    DomeKey/DomeKey/HeadphoneKey.h:10:9: fatal error:
          'DDHidLib/DDHidAppleMikey.h' file not found
    #import <DDHidLib/DDHidAppleMikey.h>
            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Couldn't figure out what the problem was, and what changed there when I
changed the DerivedData directory. So I just fixed it in the only way I
could think of: adding the DDHidLib 'lib' directory to
`HEADER_SEARCH_PATHS` and updating the `#import` to point to the new
location.

We also create a release target in this commit, which gives us a release
build of the program.

1 files changed, 20 insertions, 3 deletions

diff --git a/Makefile b/Makefile
index b7d74f0..28583ea 100644
--- a/Makefile
+++ b/Makefile
@@ -9,26 +9,43 @@ RUST_LOCAL_LIB := target/debug/libdome_key_map.a
 RUST_LIB := $(RUST_DIR)/$(RUST_LOCAL_LIB)
 RUST_SOURCE_FILES := $(shell find $(RUST_DIR)/src -type f -name '*.rs')
 
-DEBUG_PRODUCT := ~/Library/Developer/Xcode/DerivedData/DomeKey-*/Build/Products/Debug/DomeKey
+RUST_LOCAL_LIB_RELEASE := target/release/libdome_key_map.a
+RUST_LIB_RELEASE := $(RUST_DIR)/$(RUST_LOCAL_LIB_RELEASE)
+
+DEBUG_PRODUCT := build/Build/Products/Debug/DomeKey
+RELEASE_PRODUCT := build/Build/Products/Release/DomeKey
 
 
 .PHONY: build
 build: $(DEBUG_PRODUCT)
 
 $(DEBUG_PRODUCT): $(SOURCE_FILES) $(RUST_LIB)
-	xcodebuild -scheme DomeKey -configuration Debug
+	xcodebuild -scheme DomeKey -configuration Debug -derivedDataPath build
 
 $(RUST_LIB): $(RUST_SOURCE_FILES)
 	$(MAKE) -C $(RUST_DIR) $(RUST_LOCAL_LIB)
 
 .PHONY: clean
 clean:
-	xcodebuild -scheme DomeKey -configuration Debug clean
+	xcodebuild -scheme DomeKey -configuration Debug -derivedDataPath build clean
 
 .PHONY: run
 run: build
 	$(DEBUG_PRODUCT) --daemon
 
+.PHONY: build-release
+build-release: $(RELEASE_PRODUCT)
+
+$(RELEASE_PRODUCT): $(SOURCE_FILES) $(RUST_LIB_RELEASE)
+	xcodebuild -scheme DomeKey -configuration Release -derivedDataPath build
+
+$(RUST_LIB_RELEASE): $(RUST_SOURCE_FILES)
+	$(MAKE) -C $(RUST_DIR) $(RUST_LOCAL_LIB_RELEASE)
+
+.PHONY: clean-release
+clean-release:
+	xcodebuild -scheme DomeKey -configuration Release -derivedDataPath build  clean
+
 DomeKey/sound_data.h: sounds/*.mp3
 	: > $@
 	echo '#ifndef SOUND_DATA_H' >> $@