programs into the system C compiler and interpreting the generated
error messages, debug information, and object files. In practice,
parsing these is significantly less work and more robust than parsing
C source.

Cgo first invokes gcc -E -dM on the preamble, in order to find out
about simple #defines for constants and the like. These are recorded
for later use.

pkg syscall (linux-386), const SYS_GETXATTR ideal-int
pkg syscall (linux-386), const SYS_GET_KERNEL_SYMS ideal-int
pkg syscall (linux-386), const SYS_GET_MEMPOLICY ideal-int
pkg syscall (linux-386), const SYS_GET_ROBUST_LIST ideal-int
pkg syscall (linux-386), const SYS_GET_THREAD_AREA ideal-int
pkg syscall (linux-386), const SYS_GTTY ideal-int
pkg syscall (linux-386), const SYS_IDLE ideal-int

pkg syscall (linux-386), const SYS_GETXATTR = 229
pkg syscall (linux-386), const SYS_GET_KERNEL_SYMS = 130
pkg syscall (linux-386), const SYS_GET_MEMPOLICY = 275
pkg syscall (linux-386), const SYS_GET_ROBUST_LIST = 312
pkg syscall (linux-386), const SYS_GET_THREAD_AREA = 244
pkg syscall (linux-386), const SYS_GTTY = 32
pkg syscall (linux-386), const SYS_IDLE = 112
pkg syscall (linux-386), const SYS_INIT_MODULE = 128

pkg syscall (linux-arm-cgo), const SYS_GETUID32 ideal-int
pkg syscall (linux-arm-cgo), const SYS_GETXATTR ideal-int
pkg syscall (linux-arm-cgo), const SYS_GET_MEMPOLICY ideal-int
pkg syscall (linux-arm-cgo), const SYS_GET_ROBUST_LIST ideal-int
pkg syscall (linux-arm-cgo), const SYS_INIT_MODULE ideal-int
pkg syscall (linux-arm-cgo), const SYS_INOTIFY_ADD_WATCH ideal-int
pkg syscall (linux-arm-cgo), const SYS_INOTIFY_INIT ideal-int

Go <code>const</code> declarations defined in the current package.
Go assembly should avoid making assumptions about the layout of Go
types and instead use these constants.
This improves the readability of assembly code, and keeps it robust to
changes in data layout either in the Go type definitions or in the
layout rules used by the Go compiler.
</p>

<p>
Constants are of the form <code>const_<i>name</i></code>.