# Apply stack smash protection to functions using local buffers and alloca()
# Make PHP's main executable position-independent (improves ASLR security mechanism, and has no performance impact on x86_64)
# Enable optimization (-O2)
# Enable linker optimization (this sorts the hash buckets to improve cache locality, and is non-default)
# Adds GNU HASH segments to generated executables (this is used if present, and is much faster than sysv hash; in this configuration, sysv hash is also generated)
# --enable-ftp is included here because ftp_ssl_connect() needs ftp to be compiled statically (see https://github.com/docker-library/php/issues/236)
--enable-ftp \
# --enable-mbstring is included here because otherwise there's no way to get pecl to use it properly (see https://github.com/docker-library/php/issues/195)
--enable-mbstring \
# --enable-mysqlnd is included here because it's harder to compile after the fact than extensions are (since it's a plugin for several extensions, not an extension in itself)