# USE="-jmx" ACCEPT_KEYWORDS="~x86" emerge -avu1 --nodeps log4j

These are the packages that I would merge, in order:

Calculating dependencies ...done!
[ebuild     U ] dev-java/log4j-1.2.12 [1.2.9] -doc -javamail -jikes -jms -jmx* -source 0 kB

Total size of downloads: 0 kB

Do you want me to merge these packages? [Yes/No]
>>> emerge (1 of 1) dev-java/log4j-1.2.12 to /
>>> md5 files   ;-) log4j-1.2.9.ebuild
>>> md5 files   ;-) log4j-1.2.12.ebuild
>>> md5 files   ;-) log4j-1.2.11.ebuild
>>> md5 files   ;-) files/digest-log4j-1.2.12
>>> md5 files   ;-) files/digest-log4j-1.2.9
>>> md5 files   ;-) files/digest-log4j-1.2.11
>>> md5 src_uri ;-) logging-log4j-1.2.12.tar.gz
>>> Unpacking source...
>>> Unpacking logging-log4j-1.2.12.tar.gz to /var/tmp/portage/log4j-1.2.12/work
>>> Source unpacked.
Buildfile: build.xml

init:

build.core:
    [mkdir] Created dir: /var/tmp/portage/log4j-1.2.12/work/logging-log4j-1.2.12/dist/classes
    [javac] Compiling 158 source files to /var/tmp/portage/log4j-1.2.12/work/logging-log4j-1.2.12/dist/classes
    [javac] javac: invalid source release: 1.1
    [javac] Usage: javac <options> <source files>
    [javac] where possible options include:
    [javac]   -g                         Generate all debugging info
    [javac]   -g:none                    Generate no debugging info
    [javac]   -g:{lines,vars,source}     Generate only some debugging info
    [javac]   -nowarn                    Generate no warnings
    [javac]   -verbose                   Output messages about what the compiler is doing
    [javac]   -deprecation               Output source locations where deprecated APIs are used
    [javac]   -classpath <path>          Specify where to find user class files
    [javac]   -cp <path>                 Specify where to find user class files
    [javac]   -sourcepath <path>         Specify where to find input source files
    [javac]   -bootclasspath <path>      Override location of bootstrap class files
    [javac]   -extdirs <dirs>            Override location of installed extensions
    [javac]   -endorseddirs <dirs>       Override location of endorsed standards path
    [javac]   -d <directory>             Specify where to place generated class files
    [javac]   -encoding <encoding>       Specify character encoding used by source files
    [javac]   -source <release>          Provide source compatibility with specified release
    [javac]   -target <release>          Generate class files for specific VM version
    [javac]   -version                   Version information
    [javac]   -help                      Print a synopsis of standard options
    [javac]   -X                         Print a synopsis of nonstandard options
    [javac]   -J<flag>                   Pass <flag> directly to the runtime system


BUILD FAILED
/var/tmp/portage/log4j-1.2.12/work/logging-log4j-1.2.12/build.xml:215: Compile failed; see the compiler error output for details.

Total time: 1 second

!!! ERROR: dev-java/log4j-1.2.12 failed.
!!! Function src_compile, Line 44, Exitcode 1
!!! compilation error
!!! If you need support, post the topmost build error, NOT this status message.