#!/usr/bin/env make
#
# Makefile.target - platform target section
#
# Copyright (C) 2023  Landon Curt Noll
#
# Suggestion: Read the HOWTO.INSTALL file.
#
# Calc is open software; you can redistribute it and/or modify it under
# the terms of version 2.1 of the GNU Lesser General Public License
# as published by the Free Software Foundation.
#
# Calc is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
# Public License for more details.
#
# A copy of version 2.1 of the GNU Lesser General Public License is
# distributed with calc under the filename COPYING-LGPL.  You should have
# received a copy with calc; if not, write to Free Software Foundation, Inc.
# 59 Temple Place, Suite 330, Boston, MA  02111-1307, USA.
#
# This calculator first developed by David I. Bell with help/mods from others.
#
# chongo <was here> /\oo/\	http://www.isthe.com/chongo/
# Share and enjoy!  :-)	http://www.isthe.com/chongo/tech/comp/calc/


# SUGGESTION: Instead of modifying this file, consider adding
#	      statements to modify, replace or append Makefile
#	      variables in the Makefile.local file.


#######################################################################
# NOTE: These lines are included by both Makefile and custom/Makefile #
#######################################################################

##################################################################################
#-=-=-=-=-=- platform target section - targets that override defaults -=-=-=-=-=-#
##################################################################################

# Common values set in targets
#
# BLD_TYPE determines if calc is built with static and/or dynamic libs.
#	       Set this value to one of:
#
#	BLD_TYPE= calc-dynamic-only
#	BLD_TYPE= calc-static-only
#
# CC_SHARE are flags given to ${CC} to build .o files suitable for shared libs
# DEFAULT_LIB_INSTALL_PATH is where calc programs look for calc shared libs
# LD_SHARE are common flags given to ${CC} to link with shared libraries
# LIBCALC_SHLIB are flags given to ${CC} to build libcalc shared libraries
# LIBCUSTCALC_SHLIB are flags given to ${CC} to build libcustcalc shared lib
#
#	NOTE: The above 5 values are unused if BLD_TYPE= calc-static-only
#
# CC_STATIC are flags given to ${CC} to build .o files suitable for static libs
# LD_STATIC are common flags given to ${CC} to link with static libraries
# LIBCALC_STATIC are flags given to ${CC} to build libcalc static libraries
# LIBCUSTCALC_STATIC are flags given to ${CC} to build libcustcalc static lib
#
#	NOTE: The above 4 values are unused if BLD_TYPE= calc-dynamic-only
#
# CCOPT are flags given to ${CC} for optimization
# CCWARN are flags given to ${CC} for warning message control
#
# The following are given to ${CC}:
#
#	WNO_IMPLICT
#	WNO_ERROR_LONG_LONG
#	WNO_LONG_LONG
#
# when compiling special .o files that may need special compile options:
#
#	NOTE: These flags simply turn off certain compiler warnings,
#	      which is useful only when CCWERR is set to -Werror.
#
#	NOTE: If your compiler does not have these -Wno files, just
#	      set these variables to nothing as in:
#
#		WNO_IMPLICT=
#		WNO_ERROR_LONG_LONG=
#		WNO_LONG_LONG=
#
# CCWERR are flags given to ${CC} to make warnings fatal errors
#	NOTE: CCWERR is only set in development Makefiles and must only be
#	      used with ${CC}, not ${LCC}.  If you do not want the compiler
#	      to abort on warnings, then leave CCWERR blank.
# CCMISC are misc flags given to ${CC}
#
# CCBAN is given to ${CC} in order to control if banned.h is in effect.
#	NOTE: See where CCBAN is defined above for details.
#
# LCC is how the C compiler is invoked on locally executed intermediate programs
# CC is how the C compiler is invoked (with an optional Purify)
#
# Specific target overrides or modifications to default values


################
# Linux target #
################

ifeq ($(target),Linux)

# default build type for this target
#
BLD_TYPE= calc-dynamic-only

# target specific library parameters
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:/lib:/usr/lib:${LIBDIR}:${PREFIX}/lib
LD_SHARE= "-Wl,-rpath,${DEFAULT_LIB_INSTALL_PATH}" \
    "-Wl,-rpath-link,${DEFAULT_LIB_INSTALL_PATH}"
LIBCALC_SHLIB= -shared "-Wl,-soname,libcalc${LIB_EXT_VERSION}"
LIBCUSTCALC_SHLIB= -shared "-Wl,-soname,libcustcalc${LIB_EXT_VERSION}"

# static library option
#
CC_STATIC=
LD_STATIC=
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC=
LCC= gcc
CC= ${PURIFY} ${LCC} ${CCWERR}

endif	# ($(target),Linux)


###############################
# Apple macOS / Darwin target #
###############################

ifeq ($(target),Darwin)

# default build type for this target
#
BLD_TYPE= calc-dynamic-only

# For old Apple Power PC systems, we need to add:
#
#	-std=gnu99 -arch ppc
#
ifeq ($(arch),powerpc)
COMMON_ADD+= -std=gnu99
ARCH_CFLAGS+= -arch ppc
endif	# ($(arch),powerpc)

# target specific library parameters
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:${LIBDIR}:${PREFIX}/lib
LD_SHARE= ${ARCH_CFLAGS}
LIBCALC_SHLIB= -dynamiclib -undefined dynamic_lookup \
    -install_name ${LIBDIR}/libcalc${LIB_EXT_VERSION} \
    -current_version ${VER} \
    ${ARCH_CFLAGS}
LIBCUSTCALC_SHLIB= -dynamiclib -undefined dynamic_lookup \
    -install_name ${LIBDIR}/libcustcalc${LIB_EXT_VERSION} \
    -current_version ${VER} \
    ${ARCH_CFLAGS}

# To reduce dependency chains under macOS, we remove functions and
# data that are unreachable by the entry point or exported symbols.
#
COMMON_LDFLAGS+= -Wl,-dead_strip

# Do not link with "-dead_strip_dylibs" if CUSTOM is defined
# (i.e., ${ALLOW_CUSTOM} is "-DCUSTOM).  This is because unless
# the application makes an explicit symbol reference to some symbol
# in libcustcalc, the application will fail to execute due to
# a missing symbol.
#
# The calc application will run with CUSTOM defined under
# "-dead_strip_dylibs" because calc.o (in main()) makes an explicit
# reference to custtbl_allowed (see custom/custtbl.c) in libcustcalc.
# However applications such as sample_many and sample_rand will
# fail to load when CUSTOM is defined and "-dead_strip_dylibs" is used..
#
ifneq ($(ALLOW_CUSTOM),-DCUSTOM)
COMMON_LDFLAGS+= -Wl,-dead_strip_dylibs
endif	# ($(ALLOW_CUSTOM),-DCUSTOM)

# static library option
#
CC_STATIC=
LD_STATIC= ${ARCH_CFLAGS}
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC= ${ARCH_CFLAGS}
LCC= cc
CC= ${PURIFY} ${LCC} ${CCWERR}

# Darwin dynamic shared lib filenames
#
LIB_EXT:= .dylib
LIB_EXT_VERSION:= .${VERSION}${LIB_EXT}

# LDCONFIG not required on this platform, so we redefine it to an empty string
#
LDCONFIG:=

endif	# ($(target),Darwin)


##################
# FreeBSD target #
##################

ifeq ($(target),FreeBSD)

# default build type for this target
#
BLD_TYPE= calc-dynamic-only

# target specific library parameters
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:/lib:/usr/lib:${LIBDIR}:${PREFIX}/lib
LD_SHARE= "-Wl,-rpath,${DEFAULT_LIB_INSTALL_PATH}" \
    "-Wl,-rpath-link,${DEFAULT_LIB_INSTALL_PATH}"
LIBCALC_SHLIB= -shared "-Wl,-soname,libcalc${LIB_EXT_VERSION}"
LIBCUSTCALC_SHLIB= -shared "-Wl,-soname,libcustcalc${LIB_EXT_VERSION}"

CC_STATIC=
LD_STATIC=
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC=
LCC= gcc
CC= ${PURIFY} ${LCC} ${CCWERR}

# We must use gmake as the FreeBSD target because under some older
# releases of FreeBSD, make not support conditional syntax.
#
MAKE= gmake

endif	# ($(target),FreeBSD)


##################
# OpenBSD target #
##################

ifeq ($(target),OpenBSD)

# default build type for this target
#
BLD_TYPE= calc-dynamic-only

# default build type for this target
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:/lib:/usr/lib:${LIBDIR}:${PREFIX}/lib
LD_SHARE= "-Wl,-rpath,${DEFAULT_LIB_INSTALL_PATH}" \
    "-Wl,-rpath-link,${DEFAULT_LIB_INSTALL_PATH}"
LIBCALC_SHLIB= -shared "-Wl,-soname,libcalc${LIB_EXT_VERSION}"
LIBCUSTCALC_SHLIB= -shared "-Wl,-soname,libcustcalc${LIB_EXT_VERSION}"

# static library option
#
CC_STATIC=
LD_STATIC=
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC=
#
LCC= gcc
CC= ${PURIFY} ${LCC} ${CCWERR}
#
MAKE= gmake
#
endif	# ($(target),OpenBSD)


#################
# Cygwin target #
#################

ifeq ($(target),Cygwin)

BLD_TYPE= calc-static-only

# target specific library parameters
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:/lib:/usr/lib:${LIBDIR}:${PREFIX}/lib
LD_SHARE= "-Wl,-rpath,${DEFAULT_LIB_INSTALL_PATH}" \
    "-Wl,-rpath-link,${DEFAULT_LIB_INSTALL_PATH}"
LIBCALC_SHLIB= -shared "-Wl,-soname,libcalc${LIB_EXT_VERSION}"
LIBCUSTCALC_SHLIB= -shared "-Wl,-soname,libcustcalc${LIB_EXT_VERSION}"

# static library option
#
CC_STATIC=
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=
LD_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC=
LCC= cc
CC= ${PURIFY} ${LCC} ${CCWERR}

endif	# ($(target),Cygwin)


###########################################
# default target - (when target is empty) #
###########################################

# NOTE: This is the default generic host target.  Used when no other
#	host target matches.

ifeq ($(target),)

# default build type for this target
#
BLD_TYPE= calc-static-only

# target specific library parameters
#
CC_SHARE= -fPIC
DEFAULT_LIB_INSTALL_PATH= ${PWD}:/lib:/usr/lib:${LIBDIR}:${PREFIX}/lib
LD_SHARE= "-Wl,-rpath,${DEFAULT_LIB_INSTALL_PATH}" \
    "-Wl,-rpath-link,${DEFAULT_LIB_INSTALL_PATH}"
LIBCALC_SHLIB= -shared "-Wl,-soname,libcalc${LIB_EXT_VERSION}"
LIBCUSTCALC_SHLIB= -shared "-Wl,-soname,libcustcalc${LIB_EXT_VERSION}"

# static library option
#
CC_STATIC=
LIBCALC_STATIC=
LIBCUSTCALC_STATIC=
LD_STATIC=

# common values set for this target
#
#CCWARN= -Wall
CCWARN= -Wall -Wextra -pedantic
WNO_IMPLICT= -Wno-implicit
WNO_ERROR_LONG_LONG= -Wno-error=long-long
WNO_LONG_LONG= -Wno-long-long
CCWERR=
CCOPT= ${DEBUG}
CCMISC=
LCC= gcc
CC= ${PURIFY} ${LCC} ${CCWERR}

endif	# ($(target),)


###########################################
# Set the default compile flags for ${CC} #
###########################################

# If you want to add flags to all compiler and linker
# run (via ${COMMON_CFLAGS} and ${COMMON_LDFLAGS}),
# set ${COMMON_ADD}.
#
# For example to use gcc's -Werror to force warnings
# to become errors, call make with:
#
#   make .. COMMON_ADD='-Werror'
#
# This facility requires a Gnu Makefile, or a make command
# that understands the += make operand.
#
COMMON_CFLAGS+= ${COMMON_ADD}
COMMON_LDFLAGS+= ${COMMON_ADD}

# Required flags to compile C files for calc
#
# ICFLAGS are given to ${CC} for intermediate programs used to help compile calc
# CFLAGS are given to ${CC} for calc programs other than intermediate programs
#
# NOTE: This does not work for: make-XYZ-only and BLD_TYPE != make-XYZ-only
#
ifeq ($(BLD_TYPE),calc-static-only)
ICFLAGS= ${COMMON_CFLAGS} ${CCBAN} ${CC_STATIC}
else	# ($(BLD_TYPE),calc-static-only)
ICFLAGS= ${COMMON_CFLAGS} ${CCBAN} ${CC_SHARE}
endif	# ($(BLD_TYPE),calc-static-only)
CFLAGS= ${ICFLAGS} ${CCOPT}

# Required flags to link files for calc
#
# ILDFLAGS for ${CC} in linking intermediate programs used to help compile calc
# LDFLAGS for ${CC} in linking calc programs other than intermediate programs
#
ILDFLAGS= ${COMMON_LDFLAGS}
LDFLAGS= ${LD_DEBUG} ${ILDFLAGS}

#######################################################################
#-=-=-=-=-=- end of target section - only make rules below -=-=-=-=-=-#
#######################################################################