183 lines
3.7 KiB
Makefile
183 lines
3.7 KiB
Makefile
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
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#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
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# Default Mode
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#
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# - `make`
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# - Backtraces
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# - Function tracing
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# - Reasonably small
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# - Reasonably optimized
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# - Reasonably debuggable
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ifeq ($(MODE),)
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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$(FTRACE) \
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-Og
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TARGET_ARCH ?= \
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-msse3
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RAGELFLAGS ?= -G2
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endif
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# Optimized Mode
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#
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# - `make MODE=opt`
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# - Backtraces
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# - More optimized
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# - Reasonably small
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# - No memory corruption detection
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# - assert() / CHECK_xx() may leak code into binary for debuggability
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# - GCC 8+ hoists check fails into .text.cold, thus minimizing impact
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ifeq ($(MODE), opt)
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CONFIG_CPPFLAGS += \
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-DNDEBUG \
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-msse2avx \
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-Wa,-msse2avx
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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-O3
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TARGET_ARCH ?= \
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-march=native
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RAGELFLAGS ?= -G2
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endif
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# Release Mode
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#
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# - `make MODE=rel`
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# - More optimized
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# - Reasonably small
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# - Numeric backtraces
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# - Toilsome debuggability
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# - assert() statements removed
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# - DCHECK_xx() statements removed
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# - No memory corruption detection
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# - CHECK_xx() won't leak strings into binary
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ifeq ($(MODE), rel)
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CONFIG_CPPFLAGS += \
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-DNDEBUG
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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-O2
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RAGELFLAGS = -G2
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endif
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# Debug Mode
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#
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# - `make MODE=dbg`
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# - Backtraces
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# - Zero optimization
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# - Enables sanitization
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# - Enables stack canaries
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# - Enormous binaries (b/c ubsan suboptimalities)
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ifeq ($(MODE), dbg)
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CONFIG_CPPFLAGS += \
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-DMODE_DBG
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CONFIG_CCFLAGS += \
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$(BACKTRACES) \
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$(FTRACE) \
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-fno-inline
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CONFIG_COPTS += \
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$(SECURITY_BLANKETS) \
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$(SANITIZER)
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CONFIG_COPTS += \
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-ftrapv
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TARGET_ARCH ?= \
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-march=k8-sse3
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OVERRIDE_CCFLAGS += \
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-fno-pie
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endif
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# Tiny Mode
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#
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# - `make MODE=tiny`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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ifeq ($(MODE), tiny)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-march=k8-sse3
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endif
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# ANSI Mode
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#
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# These flags cause GCC to predefine __STRICT_ANSI__. Please be warned
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# that Cosmopolitan headers are written to comply with that request if
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# it's possible to do so. Consider the following example:
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#
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# make -j12 -O o//tool/viz/printvideo.i
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# clang-format-10 -i o//tool/viz/printvideo.i
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# less o//tool/viz/printvideo.i
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#
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# You'll notice functions like memcpy(), ioctl(), etc. get expanded into
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# wild-eyed gnu-style performance hacks. You can turn it off as follows:
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#
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# make -j12 -O MODE=ansi o/ansi/tool/viz/printvideo.i
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# clang-format-10 -i o/ansi/tool/viz/printvideo.i
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# less o/ansi/tool/viz/printvideo.i
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#
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# Here it becomes clear that ANSI mode can help you decouple your source
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# from Cosmopolitan, by turning it into plain ordinary textbook C code.
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#
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# Another potential use case is distributing code to folks using tools
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# such as MSVC or XCode. You can run your binary objects through a tool
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# like objconv to convert them to COFF or MachO. Then use ANSI mode to
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# rollup one header file that'll enable linkage with minimal issues.
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#
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# Lastly note that in some cases, such as gc(), there simply isn't any
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# ANSI workaround available. It's only in cases like that when we'll use
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# the __asm__() header workaround, rather than simply removing it. We do
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# however try to do that much less often than mainstream C libraries.
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ifeq ($(MODE), ansi)
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CONFIG_CFLAGS += -std=c11
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#CONFIG_CPPFLAGS += -ansi
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CONFIG_CXXFLAGS += -std=c++11
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TARGET_ARCH ?= -march=k8-sse3
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endif
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