*): Make launchd link work.

Author: tbfly

ch03/build_launchd.sh

@@ -5,12 +5,12 @@ export PLATFORM=/Applications/Xcode.app/Contents/Developer/Platforms/
    -arch armv7 -c syscalls.S -o syscalls.o
 
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang \
-   -arch armv7 -c launchd.c -o launchd.o \
+   -arch armv7 -fno-stack-protector -c launchd.c -o launchd.o \
    -isysroot $PLATFORM/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk \
    -I$PLATFORM/Developer/SDKs/iPhoneOS.sdk/usr/include \
    -I.
 
 /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang \
     -arch armv7 -o launchd launchd.o syscalls.o \
-    -static -nostartfiles -nodefaultlibs -nostdlib -Wl,-e,_main
+    -static -nostdlib -Wl,-e,_main
 

ch03/syscalls.S

@@ -1,5 +1,7 @@
 .text
 
+.align 4
+
 .globl _exit
 .globl _fork
 .globl _read