# libpsn00b interface targets
# (C) 2021 spicyjpeg - MPL licensed

# This script creates several "virtual" targets (psn00bsdk_*) that set include
# directories and compiler flags when a target is linked against them. These
# all end up in the autogenerated libpsn00b setup script after installation,
# so this file is only included when building libpsn00b.

# The following targets are currently defined:
# - psn00bsdk_common
# - psn00bsdk_object_lib (same as psn00bsdk_common)
# - psn00bsdk_static_exe
# - psn00bsdk_dynamic_exe
# - psn00bsdk_static_lib
# - psn00bsdk_shared_lib
# - psn00bsdk_module_lib (same as psn00bsdk_shared_lib)

include(GNUInstallDirs)

set(PSN00BSDK_VIRTUAL_TARGETS "")

macro(_add_interface_target name)
	add_library(${name} INTERFACE)
	list(APPEND PSN00BSDK_VIRTUAL_TARGETS ${name})

	target_compile_options(
		${name} INTERFACE
		${_aflags}
		$<$<COMPILE_LANGUAGE:C,CXX>:${_cflags}>
		$<$<COMPILE_LANGUAGE:CXX>:${_cxxflags}>
	)
	target_link_options  (${name} INTERFACE ${_ldflags})
	target_link_libraries(${name} INTERFACE ${ARGN})
endmacro()

macro(_add_alias_target name)
	#add_library(${name} ALIAS ${ARGN})
	add_library(${name} INTERFACE)
	list(APPEND PSN00BSDK_VIRTUAL_TARGETS ${name})

	target_link_libraries(${name} INTERFACE ${ARGN})
endmacro()

# Options common to all target types:
# - Define PLAYSTATION=1 and set include directories
# - Optimize for MIPS R3000
# - Inject zero checks into division operations (will throw breaks)
# - All standard libraries (including libgcc) disabled
# - Put all symbols into separate sections when building
# - C++ features that require runtime support disabled
# - Unused section stripping enabled
set(_aflags   -msoft-float -march=r3000 -mtune=r3000 -mabi=32)
set(_cflags   -mdivide-breaks -O2 -ffreestanding -fno-builtin -nostdlib -fdata-sections -ffunction-sections -fsigned-char -fno-strict-overflow -fdiagnostics-color=always)
set(_cxxflags -fno-exceptions -fno-rtti -fno-unwind-tables -fno-threadsafe-statics -fno-use-cxa-atexit)
set(_ldflags  -nostdlib -Wl,-gc-sections)

_add_interface_target(psn00bsdk_common)
_add_alias_target    (psn00bsdk_object_lib psn00bsdk_common)

target_compile_definitions(
	psn00bsdk_common INTERFACE
	PLAYSTATION=1
	$<$<CONFIG:DEBUG>:DEBUG=1>
)

# Options for executables without support for dynamic linking:
# - Position-independent code disabled
# - GP-relative addressing enabled only for local symbols
# - ABI-compatible calls disabled (incompatible with GP-relative addr)
set(_aflags   -G8)
set(_cflags   -mno-abicalls -mgpopt -mno-extern-sdata)
set(_cxxflags)
set(_ldflags  -G8 -static)

_add_interface_target(psn00bsdk_static_exe psn00bsdk_common ${PSN00BSDK_LIBRARIES})

# Options for executables with support for dynamic linking:
# - Position-independent code disabled
# - GP-relative addressing disabled
# - ABI-compatible calls disabled (must be performed manually)
set(_aflags   -G0)
set(_cflags   -mno-abicalls -mno-gpopt)
set(_cxxflags)
set(_ldflags  -G0 -static)

_add_interface_target(psn00bsdk_dynamic_exe psn00bsdk_common ${PSN00BSDK_LIBRARIES})

# Options for static libraries:
# - GP-relative addressing disabled
# - ABI-compatible calls disabled
# - Local stripping enabled
set(_aflags   -G0 -Wa,--strip-local-absolute)
set(_cflags   -mno-abicalls -mno-gpopt)
set(_cxxflags)
set(_ldflags)

_add_interface_target(psn00bsdk_static_lib psn00bsdk_common)

# Options for dynamically-loaded libraries:
# - Position-independent code enabled
# - GP-relative addressing disabled (incompatible with ABI calls)
# - ABI-compatible calls enabled
set(_aflags   -G0)
set(_cflags   -mabicalls -mshared -mno-gpopt -fPIC)
set(_cxxflags)
set(_ldflags  -G0 -shared)

_add_interface_target(psn00bsdk_shared_lib psn00bsdk_common)
_add_alias_target    (psn00bsdk_module_lib psn00bsdk_shared_lib)