Do away with memcpy/memset/memcmp

Now everything is either explicitly a rep thing, or explicitly some
other small run of reasonably efficient instructions. No library calls
or function call overhead of any kind. Code size remains nice and small.

Ban a few other bad libc functions while we're at it. More can be added
later if we decide that's a useful idea.

This will require some discipline and workarounds to cope with Clang's
tendency to shove mem* calls in places you don't want them even when you
tell it not to. Well, c'est la vie.

I'm a little nervous that the __builtin_memmove() usage in shuntvars()
could still one day emit actual library calls. It appears we're not
importing memmove() from anywhere at the moment, though. So I guess it's
good enough for now.

Also I had to get rid of alloca() in con_.c but that was kind of bad
anyway, so that's fine.

1 files changed, 4 insertions, 4 deletions

diff --git a/compile b/compile
index ca8fa0c..3ede107 100755
--- a/compile
+++ b/compile
@@ -28,8 +28,8 @@ if [ "$dbg" = 1 ]; then
 	cflags="-O0 -g3 -masm=intel -fsanitize-trap=undefined -DSST_DBG"
 	ldflags="-O0 -g3"
 else
-	cflags="-O2 -fvisibility=hidden -masm=intel"
-	ldflags="-O2 -s"
+	cflags="-O2 -fvisibility=hidden -masm=intel -ffreestanding"
+	ldflags="-O2 -s -ffreestanding"
 fi
 
 objs=
@@ -40,8 +40,8 @@ cc() {
 	# ugly annoying special case
 	if [ "$_mn" = " -DMODULE_NAME=con_" ]; then _mn=" -DMODULE_NAME=con"
 	elif [ "$_mn" = "-DMODULE_NAME=sst" ]; then _mn=; fi
-	$CC -c -flto -fpic -fno-ident $cflags $warnings -I.build/include \
-			$stdflags$_mn -o ".build/${_bn%%.c}.o" "src/$1"
+	$CC -c -flto -fpic -fno-ident $cflags $warnings -include src/1.h \
+			-I.build/include $stdflags$_mn -o ".build/${_bn%%.c}.o" "src/$1"
 }
 
 ld() {