Restore support for AMD K8

Author: jart

README.md

@@ -244,7 +244,7 @@ server. You're welcome to join us! <https://discord.gg/FwAVVu7eJ4>
 
 | Platform       | Min Version | Circa |
 | :---           | ---:        | ---:  |
-| AMD            | K8 Venus    | 2005  |
+| AMD            | K8          | 2003  |
 | Intel          | Core        | 2006  |
 | Linux          | 2.6.18      | 2007  |
 | Windows        | 8 [1]       | 2012  |

build/config.mk

@@ -14,7 +14,6 @@ ENABLE_FTRACE = 1
 CONFIG_OFLAGS ?= -g -ggdb
 CONFIG_CCFLAGS += -O2 $(BACKTRACES)
 CONFIG_CPPFLAGS += -DSYSDEBUG
-TARGET_ARCH ?= -msse3
 endif
 ifeq ($(MODE), x86_64)
 ENABLE_FTRACE = 1
@@ -64,7 +63,6 @@ ENABLE_FTRACE = 1
 CONFIG_CCFLAGS += $(BACKTRACES) -O
 CONFIG_CPPFLAGS += -DSYSDEBUG -DDWARFLESS
 CONFIG_LDFLAGS += -S
-TARGET_ARCH ?= -msse3
 endif
 
 # Optimized Mode
@@ -123,7 +121,6 @@ endif
 ifeq ($(MODE), rel)
 CONFIG_CPPFLAGS += -DNDEBUG -DDWARFLESS
 CONFIG_CCFLAGS += $(BACKTRACES) -O2
-TARGET_ARCH ?= -msse3
 PYFLAGS += -O1
 endif
 
@@ -142,7 +139,6 @@ CONFIG_OFLAGS ?= -g -ggdb
 CONFIG_CPPFLAGS += -DMODE_DBG -D__SANITIZE_UNDEFINED__
 CONFIG_CCFLAGS += $(BACKTRACES) -DSYSDEBUG -O0 -fno-inline
 CONFIG_COPTS += -fsanitize=undefined
-TARGET_ARCH ?= -msse3
 OVERRIDE_CCFLAGS += -fno-pie
 QUOTA ?= -C64 -L300
 endif
@@ -170,7 +166,6 @@ ENABLE_FTRACE = 1
 CONFIG_OFLAGS ?= -g -ggdb
 CONFIG_CCFLAGS += $(BACKTRACES) -O2
 CONFIG_CPPFLAGS += -DSYSDEBUG -DSUPPORT_VECTOR=121
-TARGET_ARCH ?= -msse3
 endif
 
 # Tiny Mode
@@ -388,7 +383,6 @@ ENABLE_FTRACE = 1
 CONFIG_COPTS += -mlong-double-64
 CONFIG_CCFLAGS += $(BACKTRACES) -O2
 CONFIG_CPPFLAGS += -DSYSDEBUG -DNOX87
-TARGET_ARCH ?= -msse3
 endif
 
 # LLVM Mode
@@ -401,7 +395,6 @@ endif
 #
 ifeq ($(MODE), llvm)
 .STRICT = 0
-TARGET_ARCH ?= -msse3
 CONFIG_CCFLAGS += $(BACKTRACES) -DSYSDEBUG -O2
 AS = clang
 CC = clang
@@ -444,7 +437,6 @@ ifeq ($(MODE), ansi)
 CONFIG_CFLAGS += -std=c11
 #CONFIG_CPPFLAGS += -ansi
 CONFIG_CXXFLAGS += -std=c++11
-TARGET_ARCH ?= -msse3
 endif
 
 ifneq ($(ENABLE_FTRACE),)

libc/runtime/warnifpowersave.c

@@ -36,6 +36,8 @@
   "/sys/devices/system/cpu/cpu*/cpufreq/scaling_governor\n"
 
 void __warn_if_powersave(void) {
+  if (1)
+    return;
   int e, fd;
   char buf[16] = {0};
   if (IsLinux()) {