* Your CXXFLAGS contains "-fvisibility-inlines-hidden" which can break packages.
 * 
 * Before you file a bug, please remove these flags and 
 * re-compile the package in question as well as all its dependencies
>>> Unpacking source...
>>> Unpacking mmap-0.2.6.tar.gz to /var/tmp/portage/dev-ruby/ruby-mmap-0.2.6/work
>>> Source unpacked in /var/tmp/portage/dev-ruby/ruby-mmap-0.2.6/work
>>> Compiling source in /var/tmp/portage/dev-ruby/ruby-mmap-0.2.6/work/mmap-0.2.6 ...
creating Makefile
make -j12 -s CC=x86_64-pc-linux-gnu-gcc CXX=x86_64-pc-linux-gnu-g++ 'DLDFLAGS=-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -Wl,--sort-common' all rdoc 
In file included from mmap.c:15:
/usr/include/ruby19-1.9.1/ruby/backward/rubyio.h:2:2: warning: #warning use "ruby/io.h" instead of "rubyio.h"
mmap.c:16:20: error: intern.h: No such file or directory
mmap.c:17:16: error: re.h: No such file or directory
mmap.c: In function ‘mm_str’:
mmap.c:337: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:338: error: ‘struct RString’ has no member named ‘len’
mmap.c:341: error: ‘struct RString’ has no member named ‘aux’
mmap.c: In function ‘mm_i_expand’:
mmap.c:383: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘size_t’
mmap.c: In function ‘mm_i_options’:
mmap.c:486: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘size_t’
mmap.c:493: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘off_t’
mmap.c: In function ‘mm_init’:
mmap.c:654: error: ‘struct RArray’ has no member named ‘len’
mmap.c:656: error: ‘struct RArray’ has no member named ‘len’
mmap.c:658: error: ‘struct RArray’ has no member named ‘ptr’
mmap.c:660: error: ‘struct RArray’ has no member named ‘ptr’
mmap.c:711: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘size_t’
mmap.c:711: warning: format ‘%d’ expects type ‘int’, but argument 4 has type ‘off_t’
mmap.c:802: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘size_t’
mmap.c: In function ‘mm_update’:
mmap.c:963: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’
mmap.c:973: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’
mmap.c:980: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_match’:
mmap.c:1023: warning: implicit declaration of function ‘rb_reg_regcomp’
mmap.c:1024: warning: implicit declaration of function ‘rb_reg_search’
mmap.c: In function ‘mm_correct_backref’:
mmap.c:1063: warning: implicit declaration of function ‘RMATCH’
mmap.c:1063: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1064: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1065: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1065: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1066: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1067: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1067: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1067: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1067: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1068: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1068: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1069: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1070: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c: In function ‘mm_sub_bang_int’:
mmap.c:1108: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1115: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1116: warning: implicit declaration of function ‘rb_reg_regsub’
mmap.c:1117: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1121: error: ‘struct RString’ has no member named ‘len’
mmap.c:1122: error: ‘struct RString’ has no member named ‘len’
mmap.c:1122: error: ‘struct RString’ has no member named ‘len’
mmap.c:1123: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1125: error: ‘struct RString’ has no member named ‘len’
mmap.c:1129: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1129: error: ‘struct RString’ has no member named ‘len’
mmap.c:1130: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1131: error: ‘struct RString’ has no member named ‘len’
mmap.c:1133: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1134: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1134: error: ‘struct RString’ has no member named ‘len’
mmap.c:1135: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_gsub_bang_int’:
mmap.c:1206: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1213: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1215: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1219: error: ‘struct RString’ has no member named ‘len’
mmap.c:1220: error: ‘struct RString’ has no member named ‘len’
mmap.c:1220: error: ‘struct RString’ has no member named ‘len’
mmap.c:1222: error: ‘struct RString’ has no member named ‘len’
mmap.c:1226: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1226: error: ‘struct RString’ has no member named ‘len’
mmap.c:1227: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1228: error: ‘struct RString’ has no member named ‘len’
mmap.c:1230: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1231: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1231: error: ‘struct RString’ has no member named ‘len’
mmap.c:1232: error: ‘struct RString’ has no member named ‘len’
mmap.c:1232: error: ‘struct RString’ has no member named ‘len’
mmap.c:1233: error: ‘struct RString’ has no member named ‘len’
mmap.c:1235: warning: implicit declaration of function ‘mbclen2’
mmap.c:1235: error: ‘struct RString’ has no member named ‘ptr’
mmap.c:1236: error: ‘struct RString’ has no member named ‘len’
mmap.c:1239: error: ‘struct RString’ has no member named ‘len’
mmap.c:1241: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_subpat_set’:
mmap.c:1293: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1297: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c:1301: error: invalid type argument of ‘->’ (have ‘int’)
mmap.c: In function ‘mm_aset’:
mmap.c:1326: warning: format ‘%d’ expects type ‘int’, but argument 3 has type ‘long int’
mmap.c:1359: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_insert’:
mmap.c:1420: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_append’:
mmap.c:1493: error: ‘struct RString’ has no member named ‘len’
mmap.c: In function ‘mm_i_bang’:
mmap.c:1784: error: ‘struct RString’ has no member named ‘len’
make: *** [mmap.o] Error 1
make: *** Waiting for unfinished jobs....
Parsing sources with 2 thread(s)...
100% [ 1/ 1]  mmap.rb                                                           

Generating Darkfish...

Files:   1
Classes: 1
Modules: 0
Methods: 61
Elapsed: 0.4s
 * ERROR: dev-ruby/ruby-mmap-0.2.6 failed:
 *   emake for ruby failed
 * 
 * Call stack:
 *     ebuild.sh, line   49:  Called src_compile
 *   environment, line 2583:  Called ruby_src_compile 'all' 'rdoc'
 *   environment, line 2527:  Called ruby_emake 'all' 'rdoc'
 *   environment, line 2506:  Called die
 * The specific snippet of code:
 *           emake CC="$(tc-getCC)" CXX="$(tc-getCXX)" DLDFLAGS="${LDFLAGS}" "$@" || die "emake for ruby failed";
 * 
 * If you need support, post the output of 'emerge --info =dev-ruby/ruby-mmap-0.2.6',
 * the complete build log and the output of 'emerge -pqv =dev-ruby/ruby-mmap-0.2.6'.
 * The complete build log is located at '/var/log/portage/dev-ruby:ruby-mmap-0.2.6:20091107-001424.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-ruby/ruby-mmap-0.2.6/temp/environment'.
 * S: '/var/tmp/portage/dev-ruby/ruby-mmap-0.2.6/work/mmap-0.2.6'