Bernardo Donadio bcdonadio

In order to compile a fully static binary when using Cgo you'll need to link in a C library like musl.

I find it convenient to have a Docker image ready for building these artifacts.

FROM golang
RUN wget https://musl.libc.org/releases/musl-1.2.5.tar.gz && \
   tar -xzf musl-1.2.5.tar.gz && \
   cd musl-1.2.5 && \
 ./configure --enable-static --disable-shared &amp;&amp; \

	Latency Comparison Numbers (~2012)
	----------------------------------
	L1 cache reference 0.5 ns
	Branch mispredict 5 ns
	L2 cache reference 7 ns 14x L1 cache
	Mutex lock/unlock 25 ns
	Main memory reference 100 ns 20x L2 cache, 200x L1 cache
	Compress 1K bytes with Zippy 3,000 ns 3 us
	Send 1K bytes over 1 Gbps network 10,000 ns 10 us
	Read 4K randomly from SSD* 150,000 ns 150 us ~1GB/sec SSD

	### No longer needed as of nginx-1.13.6-1.el7_4.ngx.x86_64.rpm from nginx.org
	### it was compiled against OpenSSL 1.0.2 from CentoOS 7.4 so it supports ALPN (HTTP2 works)

	yum -y groupinstall 'Development Tools'
	yum -y install wget openssl-devel libxml2-devel libxslt-devel gd-devel perl-ExtUtils-Embed GeoIP-devel rpmdevtools

	OPENSSL="openssl-1.0.2l"
	NGINX_VERSION="1.13.5-1"
	NJS_VERSION="1.13.5.0.1.13-1"

	/*
	* dropbox_ext4.c
	*
	* Compile like this:
	* gcc -shared -fPIC -ldl -o libdropbox_ext4.so dropbox_ext4.c
	*
	* Run Dropbox like this:
	* LD_PRELOAD=./libdropbox_ext4.so ~/.dropbox-dist/dropboxd
	*/