Introduce MODE=fastbuild for 28% speedup

build/config.mk

@@ -4,20 +4,35 @@
 # Default Mode
 #
 #   - `make`
+#   - Optimized
 #   - Backtraces
+#   - Debuggable
 #   - Syscall tracing
 #   - Function tracing
 #   - Reasonably small
-#   - Reasonably optimized
+#
-#   - Reasonably debuggable
 ifeq ($(MODE),)
-CONFIG_CCFLAGS +=		\
+CONFIG_CCFLAGS += $(BACKTRACES) $(FTRACE) -O2
-	$(BACKTRACES)		\
+CONFIG_CPPFLAGS += -DSYSDEBUG
-	$(FTRACE)		\
+TARGET_ARCH ?= -msse3
-	-DSYSDEBUG		\
+endif
-	-O2
+
-TARGET_ARCH ?=			\
+# Fast Build Mode
-	-msse3
+#
+#   - `make MODE=fastbuild`
+#   - No debugging
+#   - Syscall tracing
+#   - Function tracing
+#   - Some optimizations
+#   - Limited Backtraces
+#   - Compiles 28% faster
+#
+ifeq ($(MODE),fastbuild)
+CONFIG_CCFLAGS += $(BACKTRACES) $(FTRACE) -O
+CONFIG_CPPFLAGS += -DSYSDEBUG
+CONFIG_OFLAGS += -g0
+CONFIG_LDFLAGS += -S
+TARGET_ARCH ?= -msse3
 endif
 
 # Optimized Mode
@@ -31,19 +46,11 @@ endif
 #   - 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 +=		\
+CONFIG_CPPFLAGS += -DNDEBUG -DSYSDEBUG -msse2avx -Wa,-msse2avx
-	-DNDEBUG		\
+CONFIG_CCFLAGS += $(BACKTRACES) $(FTRACE) -O3 -fmerge-all-constants
-	-msse2avx		\
+TARGET_ARCH ?= -march=native
-	-Wa,-msse2avx
-CONFIG_CCFLAGS +=		\
-	$(BACKTRACES)		\
-	$(FTRACE)		\
-	-DSYSDEBUG		\
-	-O3			\
-	-fmerge-all-constants
-TARGET_ARCH ?=			\
-	-march=native
 endif
 
 # Optimized Linux Mode
@@ -54,18 +61,12 @@ endif
 #   - Turns off function tracing
 #   - Turns off support for older cpu models
 #   - Turns off support for other operating systems
+#
 ifeq ($(MODE), optlinux)
-CONFIG_CPPFLAGS +=		\
+CONFIG_CPPFLAGS += -DNDEBUG -msse2avx -Wa,-msse2avx -DSUPPORT_VECTOR=1
-	-DNDEBUG		\
+CONFIG_CCFLAGS += -O3 -fmerge-all-constants
-	-msse2avx		\
+DEFAULT_COPTS += -mred-zone
-	-Wa,-msse2avx		\
+TARGET_ARCH ?= -march=native
-	-DSUPPORT_VECTOR=1
-CONFIG_CCFLAGS +=		\
-	-O3 -fmerge-all-constants
-DEFAULT_COPTS +=		\
-	-mred-zone
-TARGET_ARCH ?=			\
-	-march=native
 endif
 
 # Release Mode
@@ -81,16 +82,12 @@ endif
 #   - DCHECK_xx() statements removed
 #   - No memory corruption detection
 #   - CHECK_xx() won't leak strings into binary
+#
 ifeq ($(MODE), rel)
-CONFIG_CPPFLAGS +=		\
+CONFIG_CPPFLAGS += -DNDEBUG
-	-DNDEBUG
+CONFIG_CCFLAGS += $(BACKTRACES) -O2
-CONFIG_CCFLAGS +=		\
+TARGET_ARCH ?= -msse3
-	$(BACKTRACES)		\
+PYFLAGS += -O1
-	-O2
-TARGET_ARCH ?=			\
-	-msse3
-PYFLAGS +=			\
-	-O1
 endif
 
 # Asan Mode
@@ -103,14 +100,11 @@ endif
 #   - Backtraces
 #   - Debuggability
 #   - Larger binaries
+#
 ifeq ($(MODE), asan)
-CONFIG_CCFLAGS +=		\
+CONFIG_CCFLAGS += $(BACKTRACES) -O2
-	$(BACKTRACES)		\
+CONFIG_COPTS += -fsanitize=address
-	-O2
+TARGET_ARCH ?= -msse3
-CONFIG_COPTS +=			\
-	-fsanitize=address
-TARGET_ARCH ?=			\
-	-msse3
 endif
 
 # Debug Mode
@@ -122,22 +116,13 @@ endif
 #   - Stack canaries
 #   - No optimization (TODO)
 #   - Enormous binaries
+#
 ifeq ($(MODE), dbg)
-CONFIG_CPPFLAGS +=		\
+CONFIG_CPPFLAGS += -DMODE_DBG
-	-DMODE_DBG
+CONFIG_CCFLAGS += $(BACKTRACES) $(FTRACE) -DSYSDEBUG -O -fno-inline
-CONFIG_CCFLAGS +=		\
+CONFIG_COPTS += -fsanitize=address -fsanitize=undefined
-	$(BACKTRACES)		\
+TARGET_ARCH ?= -msse3
-	$(FTRACE)		\
+OVERRIDE_CCFLAGS += -fno-pie
-	-DSYSDEBUG		\
-	-O2			\
-	-fno-inline
-CONFIG_COPTS +=			\
-	-fsanitize=address	\
-	-fsanitize=undefined
-TARGET_ARCH ?=			\
-	-msse3
-OVERRIDE_CCFLAGS +=		\
-	-fno-pie
 endif
 
 # Tiny Mode
@@ -151,6 +136,7 @@ endif
 #   - No backtraces
 #   - No algorithmics
 #   - YOLO
+#
 ifeq ($(MODE), tiny)
 CONFIG_CPPFLAGS +=			\
 	-DTINY				\
@@ -185,6 +171,7 @@ endif
 #   - No portability
 #   - No algorithmics
 #   - YOLO
+#
 ifeq ($(MODE), tinylinux)
 CONFIG_CPPFLAGS +=			\
 	-DTINY				\
@@ -216,6 +203,7 @@ endif
 #   - No backtraces
 #   - No algorithmics
 #   - YOLO
+#
 ifeq ($(MODE), tinylinuxbsd)
 CONFIG_CPPFLAGS +=		\
 	-DTINY			\
@@ -246,6 +234,7 @@ endif
 #   - No backtraces
 #   - No algorithmics
 #   - YOLO
+#
 ifeq ($(MODE), tinysysv)
 CONFIG_CPPFLAGS +=		\
 	-DTINY			\
@@ -276,6 +265,7 @@ endif
 #   - No backtraces
 #   - No algorithmics
 #   - YOLO
+#
 ifeq ($(MODE), tinynowin)
 CONFIG_CPPFLAGS +=		\
 	-DTINY			\

libc/intrin/_spinlock_yield.S

@@ -1,24 +0,0 @@
-/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8     -*-│
-│vi: set et ft=asm ts=8 tw=8 fenc=utf-8                                     :vi│
-╞══════════════════════════════════════════════════════════════════════════════╡
-│ Copyright 2022 Justine Alexandra Roberts Tunney                              │
-│                                                                              │
-│ Permission to use, copy, modify, and/or distribute this software for         │
-│ any purpose with or without fee is hereby granted, provided that the         │
-│ above copyright notice and this permission notice appear in all copies.      │
-│                                                                              │
-│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL                │
-│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED                │
-│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE             │
-│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL         │
-│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR        │
-│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER               │
-│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR             │
-│ PERFORMANCE OF THIS SOFTWARE.                                                │
-╚─────────────────────────────────────────────────────────────────────────────*/
-#include "libc/macros.internal.h"
-.privileged
-
-_spinlock_yield:
-	jmp	sched_yield
-	.endfn	_spinlock_yield,globl

libc/intrin/getpid.c

@@ -27,7 +27,10 @@
  * This function does not need to issue a system call. The PID is
  * tracked by a global variable which is updated at fork(). The only
  * exception is when the process is vfork()'d in which case a system
- * call shall be issued.
+ * call shall be issued. This optimization helps make functions like
+ * rand64() fork-safe, however it could lead to race conditions in
+ * programs that mix fork() with threads. In that case, apps should
+ * consider using `sys_getpid().ax` instead to force a system call.
  *
  * On Linux, and only Linux, the process id is guaranteed to be the same
  * as gettid() for the main thread.

libc/intrin/kclocknames.S

@@ -21,13 +21,13 @@
 
 	.macro	.e e s
 	.long	\e - kClockNames
-	.long	1f - kClockNames
+	.long	.L\@ - kClockNames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 
-	.section .rodata
+	.section .rodata,"a",@progbits
 	.align 4
 	.underrun
 kClockNames:

libc/intrin/kdos2errno.S

@@ -28,6 +28,7 @@
 	.endm
 
 	.section .rodata,"a",@progbits
+	.align	4
 	.underrun
 kDos2Errno:
 //	.e	kNtErrorInvalidFunction,ENOSYS		# in consts.sh

libc/intrin/kerrnodocs.S

@@ -21,9 +21,9 @@
 
 	.macro	.e e s
 	.long	\e - kErrnoDocs
-	.long	1f - kErrnoDocs
+	.long	.L\@ - kErrnoDocs
 	.rodata.str1.1
-1:	.asciz	"\s"
+.L\@:	.asciz	"\s"
 	.previous
 	.endm
 

libc/intrin/kerrnonames.S

@@ -21,9 +21,9 @@
 
 	.macro	.e e
 	.long	\e - kErrnoNames
-	.long	1f - kErrnoNames
+	.long	.L\@ - kErrnoNames
 	.rodata.str1.1
-1:	.string	"\e"
+.L\@:	.string	"\e"
 	.previous
 	.endm
 

libc/intrin/kipoptnames.S

@@ -21,9 +21,9 @@
 
 	.macro	.e e s
 	.long	\e - kIpOptnames
-	.long	1f - kIpOptnames
+	.long	.L\@ - kIpOptnames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 

libc/intrin/kopenflags.S

@@ -21,9 +21,9 @@
 
 	.macro	.e e s
 	.long	\e - kOpenFlags
-	.long	1f - kOpenFlags
+	.long	.L\@ - kOpenFlags
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 

libc/intrin/krlimitnames.S

@@ -21,14 +21,14 @@
 
 	.macro	.e e s
 	.long	\e - kRlimitNames
-	.long	1f - kRlimitNames
+	.long	.L\@ - kRlimitNames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 
 	.section .rodata
-	.align 4
+	.align	4
 	.underrun
 kRlimitNames:
 	.e	RLIMIT_AS,"AS"

libc/intrin/ksignalnames.S

@@ -21,14 +21,14 @@
 
 	.macro	.e e s
 	.long	\e - kSignalNames
-	.long	1f - kSignalNames
+	.long	.L\@ - kSignalNames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 
 	.section .rodata
-	.align 4
+	.align	4
 	.underrun
 kSignalNames:
 	.e	SIGHUP,"SIGHUP"

libc/intrin/ksockoptnames.S

@@ -21,14 +21,14 @@
 
 	.macro	.e e s
 	.long	\e - kSockOptnames
-	.long	1f - kSockOptnames
+	.long	.L\@ - kSockOptnames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 
 	.section .rodata
-	.align 4
+	.align	4
 	.underrun
 kSockOptnames:
 	.e	SO_DEBUG,"DEBUG"			# bool32

libc/intrin/ktcpoptnames.S

@@ -21,9 +21,9 @@
 
 	.macro	.e e s
 	.long	\e - kTcpOptnames
-	.long	1f - kTcpOptnames
+	.long	.L\@ - kTcpOptnames
 	.rodata.str1.1
-1:	.string	"\s"
+.L\@:	.string	"\s"
 	.previous
 	.endm
 

libc/intrin/pthread.h

@@ -174,7 +174,8 @@ int pthread_barrier_init(pthread_barrier_t *, const pthread_barrierattr_t *,
 
 #define pthread_spin_init(pSpin, multiprocess) ((pSpin)->lock = 0, 0)
 #define pthread_spin_destroy(pSpin)            ((pSpin)->lock = -1, 0)
-#if (__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 407
+#if (__GNUC__ + 0) * 100 + (__GNUC_MINOR__ + 0) >= 407 && \
+    !defined(__STRICT_ANSI__)
 extern const errno_t EBUSY;
 #define pthread_spin_lock(pSpin)                                          \
   ({                                                                      \