where do mac apps put their files? - macos

Question

I've got a Mac app that I'm building with clang and make. It needs a bunch of resource files that my makefile puts in foo.app/Contents/Resources but when I open the app from Finder, it fails to find those files. Let's say the file I'm trying to read is foo.app/Contents/Resources/myfile; a call like ifstream(myfile) fails (at least, the stream reports is_open == false).
I put in a call to filesystem::current_path() and it reports that it's in the directory where the app is located. And sure enough, if I prepend foo.app/Contents/Resources/ to myfile, ifstream("foo.app/Contents/Resources/myfile") finds it and opens it just fine.
But that's not how it's supposed to work. Can anyone tell me what I'm doing wrong? Thanks!
If it helps, my Makefile:
CC = clang++
CFLAGS = -g -O3 -std=c++11 -Wall -Wno-c++11-extensions
# CFLAGS = -g -std=c++11 -Wall -Wno-c++11-extensions -fsanitize=address
# CFLAGS = -g -std=c++11 -Wall -Wno-c++11-extensions
TARGET = nfl
SRCS = nfl.cpp
OTHER_SRCS = actions.cpp info.cpp io.cpp model.cpp
OBJS = $(SRCS:.cpp=.o)
OTHER_OBJS = $(OTHER_SRCS:.cpp=.o)
WX_CONFIG = ./wx-config
NFL_VERSION = 0.1
CXX_EXTRA = -mmacosx-version-min=10.9 `$(WX_CONFIG) --cxxflags` -DWX_PRECOMP
LINK_EXTRA = -mmacosx-version-min=10.9 `$(WX_CONFIG) --libs` -lm
$(TARGET): $(OBJS) $(OTHER_OBJS)
$(CC) $(CFLAGS) -o $(TARGET) $(OBJS) $(OTHER_OBJS) $(LINK_EXTRA)
convert: convert.o io.o
$(CC) $(CFLAGS) -o convert convert.o io.o
%.o:
$(CC) $(CFLAGS) $(CXX_EXTRA) -c $<
app:
mkdir -p nfl.app/Contents
mkdir -p nfl.app/Contents/MacOS
mkdir -p nfl.app/Contents/Resources
sed -e "s/VERSION/$(NFL_VERSION)/" \
Info.plist.in >nfl.app/Contents/Info.plist
echo -n "APPL????" >nfl.app/Contents/PkgInfo
cp nfl nfl.app/Contents/MacOS/nfl
cp -f wxmac.icns nfl.app/Contents/Resources/wxmac.icns
cp -f full.csv nfl.app/Contents/Resources
cp -f detailed_model nfl.app/Contents/Resources
cp -f elapsed_model nfl.app/Contents/Resources
app: nfl Info.plist.in wxmac.icns
deps:
$(CC) $(CFLAGS) $(CXX_EXTRA) -MM $(SRCS) $(OTHER_SRCS)
clean:
rm -f $(TARGET) *.o
convert.o: convert.cpp data.h
model.o: model.cpp data.h
io.o: io.cpp data.h
nfl.o: nfl.cpp nfl.h data.h
actions.o: actions.cpp nfl.h data.h
info.o: info.cpp nfl.h data.h
and my Info.plist.in file:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist SYSTEM "file://localhost/System/Library/DTDs/PropertyList.dtd">
<plist version="0.9">
<dict>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleIdentifier</key>
<string>mattginsberg.com</string>
<key>CFBundleDevelopmentRegion</key>
<string>English</string>
<key>CFBundleExecutable</key>
<string>nfl</string>
<key>CFBundleIconFile</key>
<string>wxmac.icns</string>
<key>CFBundleName</key>
<string>nfl</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>VERSION</string>
<key>CFBundleShortVersionString</key>
<string>VERSION</string>
<key>NSHumanReadableCopyright</key>
<string>Copyright (c) 2020 Matthew Ginsberg LLC.</string>
<key>CSResourcesFileMapped</key>
<true/>
<key>NSPrincipalClass</key>
<string>NSApplication</string>
</dict>
</plist>
I built wxWidgets with --enable-debug --disable-shared.