# MAKEFILE for linux GCC
#
# This makefile produces a shared object.
#
# Thanks to Zed Shaw for helping debug this on BSD/OSX.
# Tom St Denis
#
#  (GNU make only)

### USAGE:
#
# CFLAGS="-DUSE_LTM -DLTM_DESC -I/path/to/libtommath" make -f makefile.shared all EXTRALIBS=/path/to/libtommath/libtommath.a
# ./test
# make -f makefile.shared PREFIX=/opt/libtom install
#

PLATFORM := $(shell uname | sed -e 's/_.*//')
### Observed uname outputs:
# MINGW32_NT-6.2          (on MSYS/MINGW old)
# MINGW64_NT-10.0-14393   (on MSYS new)
# MSYS_NT-10.0-19042      (on MSYS2)
# CYGWIN_NT-10.0          (on Cygwin 64bit)
# CYGWIN_NT-6.2-WOW64     (on Cygwin 32bit)
# Linux                   (on all Linux distros)
# Darwin                  (on macOS, OS X)

INSTALL_CMD := install
UNINSTALL_CMD := rm -f

NAME := libtomcrypt
PIC := -fPIC
SHARED := $(PIC)

ifeq ($(UNAME), Darwin)
	NO_UNDEFINED := -Wl,-undefined,error
	SHARED += -dynamiclib
else
	NO_UNDEFIED := -Wl,--no-undefined
	SHARED += -shared
endif

ifeq ($(PLATFORM), Darwin)
	TARGET := $(NAME).dylib
else ifeq ($(OS), Windows_NT)
	TARGET := $(NAME).dll
else
	TARGET := $(NAME).so
endif

#Output filenames for various targets.
ifndef LIBNAME
	LIBNAME = $(TARGET).$(VERSION_LT)
endif

include makefile_include.mk

ifneq ($(findstring -DLTM_DESC,$(LTC_CFLAGS)),)
LTC_PKG_CONFIG_CFLAGS += -DLTM_DESC
LTC_PKG_CONFIG_LIBS += -ltommath
endif
ifneq ($(findstring -DTFM_DESC,$(LTC_CFLAGS)),)
LTC_PKG_CONFIG_CFLAGS += -DTFM_DESC
LTC_PKG_CONFIG_LIBS += -ltfm
endif
ifneq ($(findstring -DGMP_DESC,$(LTC_CFLAGS)),)
LTC_PKG_CONFIG_CFLAGS += -DGMP_DESC
LTC_PKG_CONFIG_LIBS += -lgmp
endif
ifneq ($(findstring -DLTC_PTHREAD,$(LTC_CFLAGS)),)
LTC_PKG_CONFIG_CFLAGS += -DLTC_PTHREAD
endif

# set PKG_CONFIG_CFLAGS and PKG_CONFIG_LIBS to what your environment requires
LTC_PKG_CONFIG_CFLAGS += $(PKG_CONFIG_CFLAGS)
LTC_PKG_CONFIG_LIBS += $(PKG_CONFIG_LIBS)

.PHONY: check install install_bins uninstall

.bin/.tag: bin.in
	mkdir -p .bin
	touch $@

#ciphers come in two flavours... enc+dec and enc
src/ciphers/aes/aes_enc.o: src/ciphers/aes/aes.c src/ciphers/aes/aes_tab.c
	$(CC) $(LTC_CFLAGS) $(PIC) $(CPPFLAGS) -DENCRYPT_ONLY -c src/ciphers/aes/aes.c -o src/ciphers/aes/aes_enc.o
src/ciphers/aes/aes_enc_desc.o: src/ciphers/aes/aes_desc.c
	$(CC) $(LTC_CFLAGS) $(PIC) $(CPPFLAGS) -DENCRYPT_ONLY -c src/ciphers/aes/aes_desc.c -o src/ciphers/aes/aes_enc_desc.o

.c.o:
	$(CC) $(LTC_CFLAGS) $(PIC) $(CPPFLAGS) -o $@ -c $<

$(LIBNAME): $(OBJECTS)
	$(CC) $(LTC_LDFLAGS) $(OBJECTS) $(EXTRALIBS) $(SHARED) -Wl,-soname,$(TARGET).$(VERSION_MAJOR) $(NO_UNDEFINED) -o $@

$(TARGET).$(VERSION_MAJOR) $(TARGET): $(LIBNAME)
	ln -sf $< $@

.bin/$(TEST): $(TARGET).$(VERSION_MAJOR) $(TARGET) $(TOBJECTS) .bin/.tag
	$(CC) $(LTC_LDFLAGS) $(TOBJECTS) -L. -ltomcrypt $(EXTRALIBS) $(NO_UNDEFINED) -o $@

test: $(call print-help,test,Builds the library and the 'test' application to run all self-tests) .bin/$(TEST)
	$(INSTALL_CMD) -m 755 bin.in $@

# build the demos from a template
define DEMO_template
.bin/$(1): demos/$(1).o $$(TARGET).$$(VERSION_MAJOR) $$(TARGET) .bin/.tag
	$$(CC) $$(LTC_LDFLAGS) $$< -L. -ltomcrypt $$(EXTRALIBS) $(NO_UNDEFINED) -o $$@

$(1): $(call print-help,$(1),Builds the library and the '$(1)' demo) .bin/$(1)
	$$(INSTALL_CMD) -m 755 bin.in $(1)
endef

$(foreach demo, $(strip $(DEMOS)), $(eval $(call DEMO_template,$(demo))))

install: $(call print-help,install,Installs the library + headers + pkg-config file) .common_install
	ln -sf $(LIBNAME) $(DESTDIR)/$(LIBPATH)/$(TARGET).$(VERSION_MAJOR)
	ln -sf $(LIBNAME) $(DESTDIR)/$(LIBPATH)/$(TARGET)
	sed -e 's,^prefix=.*,prefix=$(PREFIX),' -e 's,^Version:.*,Version: $(VERSION_PC),' -e 's,^libdir=.*,libdir=$(LIBPATH),' \
		-e 's,^includedir=.*,includedir=$(INCPATH),' \
		-e 's,@PKG_CONFIG_LIBS@,$(LTC_PKG_CONFIG_LIBS),' \
		-e 's,@PKG_CONFIG_CFLAGS@,$(LTC_PKG_CONFIG_CFLAGS),' libtomcrypt.pc.in > libtomcrypt.pc
	$(INSTALL_CMD) -p -d $(DESTDIR)$(LIBPATH)/pkgconfig
	$(INSTALL_CMD) -p -m 644 libtomcrypt.pc $(DESTDIR)$(LIBPATH)/pkgconfig/

install_bins: $(call print-help,install_bins,Installs the useful demos ($(USEFUL_DEMOS))) $(USEFUL_DEMOS) $(DESTDIR)$(BINPATH)
	$(INSTALL_CMD) -p -m 775 $(foreach demo, $(strip $(USEFUL_DEMOS)),.bin/$(demo)) $(DESTDIR)$(BINPATH)

uninstall: $(call print-help,uninstall,Uninstalls the library + headers + pkg-config file) .common_uninstall
	$(UNINSTALL_CMD) $(DESTDIR)/$(LIBPATH)/$(TARGET).$(VERSION_MAJOR)
	$(UNINSTALL_CMD) $(DESTDIR)/$(LIBPATH)/$(TARGET)
	$(UNINSTALL_CMD) $(DESTDIR)$(LIBPATH)/pkgconfig/libtomcrypt.pc