# emerge --info '=dev-lang/ocaml-4.00.1'
Portage 2.1.11.33 (default/linux/amd64/10.0, gcc-4.6.3, glibc-2.16.0, 3.6.5-gentoo x86_64)
=================================================================
                        System Settings
=================================================================
System uname: Linux-3.6.5-gentoo-x86_64-Intel-R-_Core-TM-2_Quad_CPU_Q6600_@_2.40GHz-with-gentoo-2.2
Timestamp of tree: Thu, 06 Dec 2012 16:30:01 +0000
ld GNU ld (GNU Binutils) 2.23.1
app-shells/bash:          4.2_p39
dev-lang/python:          2.7.3-r2, 3.2.3-r1
dev-util/cmake:           2.8.10.2
dev-util/pkgconfig:       0.27.1
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.11.6
sys-apps/sandbox:         2.6
sys-devel/autoconf:       2.69
sys-devel/automake:       1.12.5
sys-devel/binutils:       2.23.1
sys-devel/gcc:            4.6.3
sys-devel/gcc-config:     1.8
sys-devel/libtool:        2.4.2
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.6 (virtual/os-headers)
sys-libs/glibc:           2.16.0
Repositories: gentoo
ACCEPT_KEYWORDS="amd64 ~amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j1"
PKGDIR="/usr/portage/packages"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC="rsync://rsync.gentoo.org/gentoo-portage"
USE="acl acpi amd64 bash-completion bzip2 cli cracklib cxx dbus fam hal hvm iconv ithreads libnotify logrotate mmx multilib ncurses nls nptl nptlonly ntp pam pcf pcre perl pmu python readline session sse sse2 ssl ssse3 startup-notification svg tcpd unicode xvmc zlib" ELIBC="glibc" GRUB_PLATFORMS="pc" KERNEL="linux" LINGUAS="en_US en" PYTHON_TARGETS="python2_7 python3_2" QEMU_SOFTMMU_TARGETS="i386 x86_64" QEMU_USER_TARGETS="i386 x86_64" USERLAND="GNU"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

=================================================================
                        Package Settings
=================================================================

dev-lang/ocaml-4.00.1 was built with the following:
USE="(multilib) ncurses -X -emacs -latex -ocamlopt -tk -xemacs"