Bugzilla Bug 206122

checking how to hardcode library paths into programs... immediate
checking for x86_64-pc-linux-gnu-pkg-config... no
checking for pkg-config... no
checking for NJB... configure: error: The pkg-config script could not be found
or is too old.  Make sure it
is in your PATH or set the PKG_CONFIG environment variable to the full
path to pkg-config.

Alternatively, you may set the environment variables NJB_CFLAGS
and NJB_LIBS to avoid the need to call pkg-config.
See the pkg-config man page for more details.

To get pkg-config, see <http://www.freedesktop.org/software/pkgconfig>.
See `config.log' for more details.

!!! Please attach the following file when seeking support:
!!! /var/tmp/portage/dev-dotnet/njb-sharp-0.3.0/work/njb-sharp-0.3.0/config.log
 *
 * ERROR: dev-dotnet/njb-sharp-0.3.0 failed.

Portage 2.1.4 (default-linux/amd64/2007.0, gcc-4.2.2, glibc-2.7-r1,
2.6.23-gentoo-r1 x86_64)
=================================================================
System uname: 2.6.23-gentoo-r1 x86_64 AMD Athlon(tm) 64 X2 Dual Core Processor
3800+
Timestamp of tree: Tue, 15 Jan 2008 06:00:01 +0000
app-shells/bash:     3.2_p33
dev-lang/python:     2.5.1-r5
sys-apps/baselayout: 1.12.11
sys-apps/sandbox:    1.2.18.1-r2
sys-devel/autoconf:  2.61-r1
sys-devel/automake:  1.10
sys-devel/binutils:  2.18-r1
sys-devel/gcc-config: 1.4.0-r4
sys-devel/libtool:   1.5.24
virtual/os-headers:  2.6.23-r3
ACCEPT_KEYWORDS="amd64 ~amd64"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config
/usr/kde/3.5/shutdown /usr/share/config"
CONFIG_PROTECT_MASK="/etc/env.d /etc/fonts/fonts.conf /etc/gconf
/etc/revdep-rebuild /etc/terminfo /etc/texmf/web2c /etc/udev/rules.d"
CXXFLAGS="-O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FEATURES="buildpkg distlocks metadata-transfer sandbox sfperms strict
unmerge-orphans userfetch"
GENTOO_MIRRORS="http://distfiles.gentoo.org
http://distro.ibiblio.org/pub/linux/distributions/gentoo"
PKGDIR="/usr/portage/packages"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --stats --timeout=180 --exclude=/distfiles
--exclude=/local --exclude=/packages --filter=H_**/files/digest-*"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
SYNC="rsync://localhost/gentoo-portage"
USE="X acl amd64 berkdb bitmap-fonts cli cracklib crypt cups dri fortran gcj
gdbm gpm iconv ipv6 isdnlog midi mmx mudflap ncurses nls nptl nptlonly objc
openmp pam pcre perl pppd python readline reflection session spl sse sse2 ssl
tcpd truetype-fonts type1-fonts unicode xorg zlib" ALSA_CARDS="ali5451 als4000
atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968
fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx
via82xx-modem ymfpci" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop
empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mulaw multi
null plug rate route share shm softvol" APACHE2_MODULES="actions alias
auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm
authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache
dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache
filter headers include info log_config logio mem_cache mime mime_magic
negotiation rewrite setenvif speling status unique_id userdir usertrack
vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux"
LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses
text" USERLAND="GNU" VIDEO_CARDS="vga"
Unset:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL,
LDFLAGS, LINGUAS, MAKEOPTS, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS,
PORTAGE_RSYNC_EXTRA_OPTS, PORTDIR_OVERLAY

Thanks for reporting, fixed.