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#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
# Default Mode
#
# - `make`
# - Backtraces
# - Function tracing
# - Reasonably small
# - Reasonably optimized
# - Reasonably debuggable
ifeq ($(MODE),)
CONFIG_CCFLAGS += \
$(BACKTRACES) \
$(FTRACE) \
-Og
TARGET_ARCH ?= \
-msse3
RAGELFLAGS ?= -G2
endif
# Optimized Mode
#
# - `make MODE=opt`
# - Backtraces
# - More optimized
# - Reasonably small
# - No memory corruption detection
# - assert() / CHECK_xx() may leak code into binary for debuggability
# - GCC 8+ hoists check fails into .text.cold, thus minimizing impact
ifeq ($(MODE), opt)
CONFIG_CPPFLAGS += \
-DNDEBUG \
-msse2avx \
-Wa,-msse2avx
CONFIG_CCFLAGS += \
$(BACKTRACES) \
-O3
TARGET_ARCH ?= \
-march=native
RAGELFLAGS ?= -G2
endif
# Release Mode
#
# - `make MODE=rel`
# - More optimized
# - Reasonably small
# - Numeric backtraces
# - Toilsome debuggability
# - assert() statements removed
# - DCHECK_xx() statements removed
# - No memory corruption detection
# - CHECK_xx() won't leak strings into binary
ifeq ($(MODE), rel)
CONFIG_CPPFLAGS += \
-DNDEBUG
CONFIG_CCFLAGS += \
$(BACKTRACES) \
-O2
RAGELFLAGS = -G2
endif
# Debug Mode
#
# - `make MODE=dbg`
# - Backtraces
# - Zero optimization
# - Enables sanitization
# - Enables stack canaries
# - Enormous binaries (b/c ubsan suboptimalities)
ifeq ($(MODE), dbg)
CONFIG_CPPFLAGS += \
-DMODE_DBG
CONFIG_CCFLAGS += \
$(BACKTRACES) \
$(FTRACE) \
-fno-inline
CONFIG_COPTS += \
$(SECURITY_BLANKETS) \
$(SANITIZER)
CONFIG_COPTS += \
-ftrapv
TARGET_ARCH ?= \
-msse3
OVERRIDE_CCFLAGS += \
-fno-pie
endif
# Tiny Mode
#
# - `make MODE=tiny`
# - No checks
# - No asserts
# - No canaries
# - No paranoia
# - No avx hooks
# - No backtraces
# - No algorithmics
# - YOLO
ifeq ($(MODE), tiny)
CONFIG_CPPFLAGS += \
-DTINY \
-DNDEBUG \
-DTRUSTWORTHY
CONFIG_CCFLAGS += \
-Os \
-fno-align-functions \
-fno-align-jumps \
-fno-align-labels \
-fno-align-loops
TARGET_ARCH ?= \
-msse3
endif
# ANSI Mode
#
# These flags cause GCC to predefine __STRICT_ANSI__. Please be warned
# that Cosmopolitan headers are written to comply with that request if
# it's possible to do so. Consider the following example:
#
# make -j12 -O o//tool/viz/printvideo.i
# clang-format-10 -i o//tool/viz/printvideo.i
# less o//tool/viz/printvideo.i
#
# You'll notice functions like memcpy(), ioctl(), etc. get expanded into
# wild-eyed gnu-style performance hacks. You can turn it off as follows:
#
# make -j12 -O MODE=ansi o/ansi/tool/viz/printvideo.i
# clang-format-10 -i o/ansi/tool/viz/printvideo.i
# less o/ansi/tool/viz/printvideo.i
#
# Here it becomes clear that ANSI mode can help you decouple your source
# from Cosmopolitan, by turning it into plain ordinary textbook C code.
#
# Another potential use case is distributing code to folks using tools
# such as MSVC or XCode. You can run your binary objects through a tool
# like objconv to convert them to COFF or MachO. Then use ANSI mode to
# rollup one header file that'll enable linkage with minimal issues.
#
# Lastly note that in some cases, such as gc(), there simply isn't any
# ANSI workaround available. It's only in cases like that when we'll use
# the __asm__() header workaround, rather than simply removing it. We do
# however try to do that much less often than mainstream C libraries.
ifeq ($(MODE), ansi)
CONFIG_CFLAGS += -std=c11
#CONFIG_CPPFLAGS += -ansi
CONFIG_CXXFLAGS += -std=c++11
TARGET_ARCH ?= -msse3
endif