mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 06:53:33 +00:00
4778cd4d27
This change fixes an issue with the tcflow() magic numbers that was causing bash to freeze up on Linux. While auditing termios polyfills, several other issues were identified with XNU/BSD compatibility. Out of an abundance of caution this change undefines as much surface area from libc/calls/struct/termios.h as possible, so that autoconf scripts are less likely to detect non-POSIX teletypewriter APIs that haven't been polyfilled by Cosmopolitan. This is a *breaking change* for your static archives in /opt/cosmos if you use the cosmocc toolchain. That's because this change disables the ioctl() undiamonding trick for code outside the monorepo, specifically because it'll lead to brittle ABI breakages like this. If you're using the cosmocc toolchain, you'll need to rebuild libraries like ncurses, readline, etc. Yes diamonds cause bloat. To work around that, consider using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you avoid pulling every single ioctl-related polyfill into the linkage. The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
469 lines
9.7 KiB
Makefile
469 lines
9.7 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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# - Optimized
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# - Backtraces
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# - Debuggable
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# - Syscall tracing
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# - Function tracing
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# - Reasonably small
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#
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ifeq ($(MODE),)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CCFLAGS += $(BACKTRACES) -O2
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CONFIG_CPPFLAGS += -DSYSDEBUG
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TARGET_ARCH ?= -msse3
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endif
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ifeq ($(MODE), aarch64)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CCFLAGS += -O2 $(BACKTRACES)
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CONFIG_CPPFLAGS += -DSYSDEBUG
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endif
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# Zero Optimization Mode
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#
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# - Goes 2x slower
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# - Supports --strace
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# - Unsupports --ftrace
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# - Better GDB debugging
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#
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ifeq ($(MODE), zero)
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CONFIG_OFLAGS ?= -g
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OVERRIDE_CFLAGS += -O0
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OVERRIDE_CXXFLAGS += -O0
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CONFIG_CPPFLAGS += -DSYSDEBUG
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endif
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ifeq ($(MODE), aarch64-zero)
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CONFIG_OFLAGS ?= -g
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OVERRIDE_CFLAGS += -O0
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OVERRIDE_CXXFLAGS += -O0
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CONFIG_CPPFLAGS += -DSYSDEBUG
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endif
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# Fast Build Mode
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#
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# - `make MODE=fastbuild`
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# - No debugging
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# - Syscall tracing
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# - Function tracing
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# - Some optimizations
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# - Limited Backtraces
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# - Compiles 28% faster
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#
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ifeq ($(MODE), fastbuild)
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ENABLE_FTRACE = 1
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CONFIG_CCFLAGS += $(BACKTRACES) -O
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CONFIG_CPPFLAGS += -DSYSDEBUG -DDWARFLESS
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CONFIG_LDFLAGS += -S
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TARGET_ARCH ?= -msse3
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endif
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# Optimized Mode
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#
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# - `make MODE=opt`
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# - Backtraces
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# - More optimized
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# - Syscall tracing
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# - Function tracing
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# - Reasonably small
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# - No memory corruption detection
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# - assert() / CHECK_xx() may leak code into binary for debuggability
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# - GCC 8+ hoists check fails into .text.cold, thus minimizing impact
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#
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ifeq ($(MODE), opt)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CPPFLAGS += -DNDEBUG -DSYSDEBUG -msse2avx -Wa,-msse2avx
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CONFIG_CCFLAGS += $(BACKTRACES) -O3 -fmerge-all-constants
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TARGET_ARCH ?= -march=skylake
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endif
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# Optimized Linux Mode
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#
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# - `make MODE=optlinux`
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# - Turns on red zone
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# - Turns off backtraces
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# - Turns off function tracing
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# - Turns off support for older cpu models
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# - Turns off support for other operating systems
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#
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ifeq ($(MODE), optlinux)
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CONFIG_OFLAGS ?= -g
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CONFIG_CPPFLAGS += -DNDEBUG -msse2avx -Wa,-msse2avx -DSUPPORT_VECTOR=1
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CONFIG_CCFLAGS += -O3 -fmerge-all-constants
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CONFIG_COPTS += -mred-zone
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TARGET_ARCH ?= -march=native
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endif
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# Release Mode
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#
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# Follows traditional closed source release binary norms.
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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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# - No DWARF data bloat
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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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#
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ifeq ($(MODE), rel)
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CONFIG_CPPFLAGS += -DNDEBUG
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CONFIG_CCFLAGS += $(BACKTRACES) -O2
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TARGET_ARCH ?= -msse3
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PYFLAGS += -O1
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endif
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# Asan Mode
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#
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# Safer binaries good for backend production serving.
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#
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# - `make MODE=asan`
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# - Memory safety
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# - Production worthy
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# - Backtraces
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# - Debuggability
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# - Larger binaries
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#
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ifeq ($(MODE), asan)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CCFLAGS += $(BACKTRACES) -O2 -DSYSDEBUG
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CONFIG_COPTS += -fsanitize=address
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TARGET_ARCH ?= -msse3
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QUOTA ?= -C64 -L300
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endif
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# Debug Mode
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#
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# - `make MODE=dbg`
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# - Backtraces
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# - Enables asan
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# - Enables ubsan
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# - Stack canaries
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# - No optimization
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# - Enormous binaries
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#
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ifeq ($(MODE), dbg)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CPPFLAGS += -DMODE_DBG
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CONFIG_CCFLAGS += $(BACKTRACES) -DSYSDEBUG -O0 -fno-inline
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CONFIG_COPTS += -fsanitize=address -fsanitize=undefined
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TARGET_ARCH ?= -msse3
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OVERRIDE_CCFLAGS += -fno-pie
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QUOTA ?= -C64 -L300
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endif
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ifeq ($(MODE), aarch64-dbg)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CPPFLAGS += -DMODE_DBG
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CONFIG_CCFLAGS += $(BACKTRACES) -DSYSDEBUG -O0 -fno-inline
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CONFIG_COPTS += -fsanitize=undefined
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QUOTA ?= -C64 -L300
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endif
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# System Five Mode
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#
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# - `make MODE=sysv`
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# - Optimized
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# - Backtraces
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# - Debuggable
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# - Syscall tracing
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# - Function tracing
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# - No Windows bloat!
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#
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ifeq ($(MODE), sysv)
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ENABLE_FTRACE = 1
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CONFIG_OFLAGS ?= -g
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CONFIG_CCFLAGS += $(BACKTRACES) -O2
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CONFIG_CPPFLAGS += -DSYSDEBUG -DSUPPORT_VECTOR=121
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TARGET_ARCH ?= -msse3
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endif
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# Tiny Mode
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#
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# - `make MODE=tiny`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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#
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ifeq ($(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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-fschedule-insns2 \
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-momit-leaf-frame-pointer \
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-foptimize-sibling-calls \
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-DDWARFLESS
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TARGET_ARCH ?= \
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-msse3
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PYFLAGS += \
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-O2 \
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-B
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endif
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ifeq ($(MODE), aarch64-tiny)
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# TODO(jart): -mcmodel=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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-fschedule-insns2 \
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-momit-leaf-frame-pointer \
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-foptimize-sibling-calls \
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-DDWARFLESS
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PYFLAGS += \
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-O2 \
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-B
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endif
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# Linux-Only Tiny Mode
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#
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# - `make MODE=tinylinux`
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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 portability
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# - No algorithmics
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# - YOLO
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#
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ifeq ($(MODE), tinylinux)
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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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-DSUPPORT_VECTOR=1 \
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-DDWARFLESS
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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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-msse3
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endif
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# Linux+BSD Tiny Mode
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#
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# - `make MODE=tinylinuxbsd`
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# - No apple
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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 microsoft
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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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#
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ifeq ($(MODE), tinylinuxbsd)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=113 \
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-DDWARFLESS
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# Unix Tiny Mode
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#
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# - `make MODE=tinysysv`
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# - No checks
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# - No asserts
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# - No canaries
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# - No paranoia
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# - No microsoft
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# - No avx hooks
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# - No backtraces
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# - No algorithmics
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# - YOLO
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#
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ifeq ($(MODE), tinysysv)
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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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-DSUPPORT_VECTOR=121 \
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-DDWARFLESS
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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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-msse3
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endif
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# Tiny Metallic Unix Mode
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#
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# - `make MODE=tinynowin`
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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 microsoft
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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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#
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ifeq ($(MODE), tinynowin)
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CONFIG_CPPFLAGS += \
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-DTINY \
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-DNDEBUG \
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-DTRUSTWORTHY \
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-DSUPPORT_VECTOR=251 \
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-DDWARFLESS
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CONFIG_CCFLAGS += \
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-Os \
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-fno-align-functions \
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-fno-align-jumps \
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-fno-align-labels \
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-fno-align-loops
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TARGET_ARCH ?= \
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-msse3
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endif
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# LLVM Mode
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ifeq ($(MODE), llvm)
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TARGET_ARCH ?= -msse3
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CONFIG_CCFLAGS += $(BACKTRACES) -DSYSDEBUG -O2
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AS = clang
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CC = clang
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CXX = clang++
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CXXFILT = llvm-c++filt
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LD = ld.lld
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NM = llvm-nm
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GCC = clang
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STRIP = llvm-strip
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OBJCOPY = llvm-objcopy
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OBJDUMP = llvm-objdump
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ADDR2LINE = llvm-addr2line
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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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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 ?= -msse3
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endif
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ifneq ($(ENABLE_FTRACE),)
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CONFIG_CPPFLAGS += -DFTRACE
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FTRACE_CCFLAGS = -fno-inline-functions-called-once
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OVERRIDE_CFLAGS += $(FTRACE_CCFLAGS)
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OVERRIDE_CXXFLAGS += $(FTRACE_CCFLAGS)
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# function prologue nops for --ftrace
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ifeq ($(ARCH), x86_64)
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# this flag causes gcc to generate functions like this
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#
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# nop nop nop nop nop nop nop nop nop
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# func:
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# nop nop
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# ...
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#
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# which tool/build/fixupobj.c improves at build time like this
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#
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# nop nop nop nop nop nop nop nop nop
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# func:
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# xchg %ax,%ax
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# ...
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#
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# which --ftrace morphs at runtime like this
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#
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# ud2 # 2 bytes
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# call ftrace_hook # 5 bytes
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# jmp +2 # 2 bytes
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# func:
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# jmp -7 # 2 bytes
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# ...
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#
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CONFIG_CCFLAGS += -fpatchable-function-entry=18,16
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endif
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ifeq ($(ARCH), aarch64)
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# this flag causes gcc to generate functions like this
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#
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# nop nop nop nop nop nop
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# func:
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# nop
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# ...
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#
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# which --ftrace morphs at runtime like this
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#
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# brk #31337
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# stp x29,x30,[sp,#-16]!
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# mov x29,sp
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# bl ftrace_hook
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# ldp x29,x30,[sp],#16
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# b +1
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# func:
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# b -5
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# ...
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#
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CONFIG_CCFLAGS += -fpatchable-function-entry=7,6
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endif
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endif
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