From 39501543deccc7b8adaf4ffd66ffa3aaa8affc5a Mon Sep 17 00:00:00 2001
From: Nick Shipp <git@segbrk.com>
Date: Sat, 16 May 2020 11:13:42 -0400
Subject: Const police

---
 Makefile     | 17 +++++++++++++----
 config.def.h | 16 ++++++++--------
 config.mk    |  4 ++--
 sinit.c      |  6 +++---
 4 files changed, 26 insertions(+), 17 deletions(-)

diff --git a/Makefile b/Makefile
index f4e0a45..d3a7999 100644
--- a/Makefile
+++ b/Makefile
@@ -1,15 +1,24 @@
 include config.mk
-CC = diet -Os gcc
+CC = diet -Os clang
+LD = diet clang
 
 OBJ = sinit.o
 BIN = sinit
-CFLAGS = -Os -flto -s -fno-asynchronous-unwind-tables -fno-unwind-tables
-LDFLAGS = -flto -Os -static -Wl,--gc-sections -Wl,--strip-all -Wl,-z,norelro -fno-asynchronous-unwind-tables -Wl,--build-id=none
+CFLAGS = -Oz -flto -fno-asynchronous-unwind-tables -fno-unwind-tables -ffunction-sections -fdata-sections
+LDFLAGS = -flto -O2 -static -Wl,--gc-sections -Wl,--strip-all -Wl,-z,norelro -fno-asynchronous-unwind-tables -Wl,--build-id=none
 
 all: $(BIN) poweroff reboot
 
+reboot: reboot.o
+	$(LD) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)
+	strip -R .comment -R .jcr -R .eh_data -R .note -R .eh_frame $@
+
+poweroff: poweroff.o
+	$(LD) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)
+	strip -R .comment -R .jcr -R .eh_data -R .note -R .eh_frame $@
+
 $(BIN): $(OBJ)
-	$(CC) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)
+	$(LD) $(LDFLAGS) -o $@ $(OBJ) $(LDLIBS)
 	strip -R .comment -R .jcr -R .eh_data -R .note -R .eh_frame $@
 
 $(OBJ): config.h
diff --git a/config.def.h b/config.def.h
index 9fcbc98..39cae29 100644
--- a/config.def.h
+++ b/config.def.h
@@ -5,20 +5,20 @@
 #define USERNAME "who"
 #define HOMEDIR  "/home/" USERNAME
 
-uid_t uid = 1000;
-gid_t gid = 1000;
+static uid_t uid = 1000;
+static gid_t gid = 1000;
 
 /* Enable startup profiling with perf(1) */
 // #define PERF
 
 #ifdef PERF
-static char *const perf[] = {
+static const char *const perf[] = {
       	"/usr/bin/perf", "record", "-ag", "--output=/tmp/perf.data",
        	"--", "sleep", "3" };
 #endif
 
 /* constant groups to set for user session */
-static gid_t const groups[] = {
+static const gid_t groups[] = {
 	5, 	/* tty */
 	10,	/* wheel */
 	91, 	/* video */
@@ -27,7 +27,7 @@ static gid_t const groups[] = {
 
 int udev_settled(void);
 
-static struct {
+static const struct {
 	int (*dep)();
 	char *argv[6];
 } init_procs[] = {
@@ -41,7 +41,7 @@ static struct {
 	udev_settled, 	{ "/usr/bin/illum-d", NULL },
 };
 
-static struct {
+static const struct {
 	char *source;
 	char *target;
 	char *type;
@@ -56,7 +56,7 @@ static struct {
 	{ "tmpfs",  "/run",     "tmpfs",  MS_NOSUID|MS_NODEV,                       "mode=755" },
 };
 
-static char *const user_env[] = {
+static const char *const user_env[] = {
 	"HOME=" HOMEDIR,
 	"PWD=" HOMEDIR,
 	"PATH=/usr/bin",
@@ -68,7 +68,7 @@ static char *const user_env[] = {
 	NULL
 };
 
-static char *const user_procs[][5]  = {
+static const char *const user_procs[][5]  = {
 	{ "/usr/bin/xinit", "/usr/bin/dwm", "--", "-quiet", NULL },
 };
 
diff --git a/config.mk b/config.mk
index c1f87b4..84612a2 100644
--- a/config.mk
+++ b/config.mk
@@ -5,8 +5,8 @@ VERSION = 1.0
 PREFIX = /usr/local
 MANPREFIX = $(PREFIX)/share/man
 
-CC = cc
+CC = clang
 LD = $(CC)
 CPPFLAGS =
-CFLAGS   = -Wextra -Wall -Os
+CFLAGS   = -Wextra -Wall -Oz
 LDFLAGS  = -s -static
diff --git a/sinit.c b/sinit.c
index 6ae54c0..0929cb6 100644
--- a/sinit.c
+++ b/sinit.c
@@ -22,7 +22,7 @@ static void sigpoweroff(void);
 static void sigreap(void);
 static void sigreboot(void);
 static void spawn(int (*)(), char *const []);
-static void spawn_as(uid_t, gid_t, char *const [], char *const []);
+static void spawn_as(uid_t, gid_t, const char *const [], const char *const []);
 static void mounts(void);
 static void ifup(const char *iface);
 
@@ -156,7 +156,7 @@ spawn(int (*dep)(), char *const argv[])
 }
 
 static void
-spawn_as(uid_t uid, gid_t gid, char *const env[], char *const argv[])
+spawn_as(uid_t uid, gid_t gid, const char *const env[], const char *const argv[])
 {
 	/* printf("spawn_as %d,%d: %s\n", uid, gid, argv[0]); */
 	switch (fork()) {
@@ -168,7 +168,7 @@ spawn_as(uid_t uid, gid_t gid, char *const env[], char *const argv[])
 		setgid(gid);
 		setgroups(LEN(groups), groups);
 		setuid(uid);
-		execve(argv[0], argv, env);
+		execve(argv[0], (char *const *)argv, (char *const *)env);
 #ifdef SANE
 		write(2, "can't exec\n", 11);
 		_exit(1);
-- 
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