<h2>Full example</h2>
<pre><code># Source: https://gn.googlesource.com/gn/+/main/docs/cross_compiles.md
declare_args() {
# Applies only to toolchains targeting target_cpu.
sysroot = ""
}
config("my_config") {
# Uses current_cpu because compile flags are toolchain-dependent.
if (current_cpu == "arm") {
defines = [ "CPU_IS_32_BIT" ]
} else {
defines = [ "CPU_IS_64_BIT" ]
}
# Compares current_cpu with target_cpu to see whether current_toolchain
# has the same architecture as target_toolchain.
if (sysroot != "" && current_cpu == target_cpu) {
cflags = [
"-isysroot",
sysroot,
]
}
}</code></pre>
