# Copying and distribution of this file, with or without modification,
# are permitted in any medium without royalty provided the copyright
# notice and this notice are preserved.  This file is offered as-is,
# without any warranty.


# The package path prefix, if you want to install to another root, set DESTDIR to that root.
PREFIX ?= /usr
# The command path excluding prefix.
BIN ?= /bin
# The resource path excluding prefix.
DATA ?= /share
# The command path including prefix.
BINDIR ?= $(PREFIX)$(BIN)
# The resource path including prefix.
DATADIR ?= $(PREFIX)$(DATA)
# The license base path including prefix.
LICENSEDIR ?= $(DATADIR)/licenses

# The name of the package as it should be installed.
PKGNAME ?= file2key
# The name of the command as it should be installed.
COMMAND ?= file2key


# Optimisation level (and debug flags.)
OPTIMISE = -O3

# Enabled Warnings.
WARN = -Wall -Wextra -pedantic -Wdouble-promotion -Wformat=2 -Winit-self       \
       -Wmissing-include-dirs -Wtrampolines -Wfloat-equal -Wshadow             \
       -Wmissing-prototypes -Wmissing-declarations -Wredundant-decls           \
       -Wnested-externs -Wno-variadic-macros -Wsign-conversion                 \
       -Wswitch-default -Wconversion -Wsync-nand -Wunsafe-loop-optimizations   \
       -Wcast-align -Wstrict-overflow -Wdeclaration-after-statement -Wundef    \
       -Wbad-function-cast -Wcast-qual -Wwrite-strings -Wlogical-op            \
       -Waggregate-return -Wstrict-prototypes -Wold-style-definition -Wpacked  \
       -Wvector-operation-performance -Wunsuffixed-float-constants             \
       -Wsuggest-attribute=const -Wsuggest-attribute=noreturn                  \
       -Wsuggest-attribute=pure -Wsuggest-attribute=format -Wnormalized=nfkc

# The C standard used in the code.
STD = gnu99


# Options for the C compiler.
FLAGS = $(OPTIMISE) $(WARN) -std=$(STD) \
        -ftree-vrp -fstrict-aliasing -fipa-pure-const -fstack-usage \
        -fstrict-overflow -funsafe-loop-optimizations -fno-builtin



.PHONY: all
all: bin/file2key

bin/file2key: obj/file2key.o
	@mkdir -p bin
	$(CC) $(FLAGS) -lpassphrase -lkeccak -o $@ $^ $(LDFLAGS)

obj/%.o: src/%.c
	@mkdir -p obj
	$(CC) $(FLAGS) -c -o $@ $< $(CFLAGS) $(CPPFLAGS)


.PHONY: install
install: bin/file2key
	install -dm755 -- "$(DESTDIR)$(BINDIR)"
	install -m755 bin/file2key -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"
	install -dm755 -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
	install -m644 LICENSE COPYING -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"

.PHONY: uninstall
uninstall:
	-rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/COPYING"
	-rm -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)/LICENSE"
	-rmdir -- "$(DESTDIR)$(LICENSEDIR)/$(PKGNAME)"
	-rm -- "$(DESTDIR)$(BINDIR)/$(COMMAND)"


.PHONY: clean
clean:
	-rm -r bin obj