Initial import

build/config.mk

@@ -0,0 +1,152 @@
+#-*-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 +=		\
+	$(BACKTRACES)		\
+	-O3
+
+#TARGET_ARCH ?=			\
+	-msse3
+
+RAGELFLAGS = -G2
+
+endif
+
+# Debug Mode
+#
+#   - `make MODE=dbg`
+#   - Backtraces
+#   - Zero optimization
+#   - Enables sanitization
+#   - Enables stack canaries
+#   - Enormous binaries (b/c ubsan suboptimalities)
+
+ifeq ($(MODE), dbg)
+
+CONFIG_CPPFLAGS +=		\
+	-DMODE_DBG
+
+CONFIG_CCFLAGS +=		\
+	$(BACKTRACES)		\
+	$(FTRACE)		\
+	-fno-inline
+
+CONFIG_COPTS +=			\
+	$(SECURITY_BLANKETS)	\
+	$(SANITIZER)
+
+OVERRIDE_CCFLAGS +=		\
+	-fno-pie
+
+endif
+
+# Tiny Mode
+#
+#   - `make MODE=tiny`
+#   - No checks
+#   - No asserts
+#   - No canaries
+#   - No paranoia
+#   - No avx hooks
+#   - No backtraces
+#   - No algorithmics
+#   - YOLO
+
+ifeq ($(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
+#
+# Folks who want it deserve to get it, good and hard.
+
+ifeq ($(MODE), ansi)
+
+CONFIG_CCFLAGS +=		\
+	-std=c11		\
+	-Og
+
+endif