emerge -av cyrus-sasl       

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild  N    ] dev-libs/cyrus-sasl-2.1.21-r2  USE="berkdb crypt java kerberos ldap mysql pam ssl -authdaemond -gdbm -ntlm_unsupported_patch -postgres -sample -srp -urandom" 0 kB 

Total size of downloads: 0 kB

Would you like to merge these packages? [Yes/No] y

<snip>

make[3]: Leaving directory `/var/tmp/portage/cyrus-sasl-2.1.21-r2/work/cyrus-sasl-2.1.21/java/CyrusSasl'
make[3]: Entering directory `/var/tmp/portage/cyrus-sasl-2.1.21-r2/work/cyrus-sasl-2.1.21/java/CyrusSasl'
CLASSPATH=..:./..:$CLASSPATH javac -d ..   Sasl.java GenericClient.java ClientFactory.java GenericCommon.java SaslClient.java SaslClientFactory.java SaslException.java SaslInputStream.java SaslOutputStream.java SaslUtils.java ServerFactory.java SaslServerFactory.java SaslServer.java GenericServer.java
gcc-config error: javac wrapper: Unable to determine executable.
        CTARGET=i686-pc-linux-gnu
        exec=javac

make[3]: *** [classjavasasl.stamp] Error 1
make[3]: Leaving directory `/var/tmp/portage/cyrus-sasl-2.1.21-r2/work/cyrus-sasl-2.1.21/java/CyrusSasl'
make[2]: *** [all-recursive] Error 1
make[2]: Leaving directory `/var/tmp/portage/cyrus-sasl-2.1.21-r2/work/cyrus-sasl-2.1.21/java'
make[1]: *** [all-recursive] Error 1
make[1]: Leaving directory `/var/tmp/portage/cyrus-sasl-2.1.21-r2/work/cyrus-sasl-2.1.21'
make: *** [all] Error 2

!!! ERROR: dev-libs/cyrus-sasl-2.1.21-r2 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  cyrus-sasl-2.1.21-r2.ebuild, line 176:   Called die

!!! compile problem
!!! If you need support, post the topmost build error, and the call stack if relevant.