Someone

creating cd-paranoia
make[4]: Leaving directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73/src/cd-paranoia'
make[3]: Leaving directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73/src/cd-paranoia'
make[3]: Entering directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73/src'
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../lib/driver -I../include/        -O2 -march=athlon64  -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare -c cd-drive.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../lib/driver -I../include/        -O2 -march=athlon64  -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare -c util.c
/bin/sh ../libtool --mode=link --tag=CC x86_64-pc-linux-gnu-gcc  -O2 -march=athlon64  -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare   -o cd-drive  cd-drive.o util.o ../lib/iso9660/libiso9660.la ../lib/driver/libcdio.la -lpopt  -lm
mkdir .libs
x86_64-pc-linux-gnu-gcc -O2 -march=athlon64 -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare -o .libs/cd-drive cd-drive.o util.o  ../lib/iso9660/.libs/libiso9660.so ../lib/driver/.libs/libcdio.so /usr/lib64/libpopt.so -lm
creating cd-drive
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../lib/driver -I../include/        -O2 -march=athlon64  -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare -c cd-info.c
x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I. -I.. -I.. -I../lib/driver -I../include/        -O2 -march=athlon64  -fomit-frame-pointer -pipe -Wall -Wchar-subscripts -Wmissing-prototypes -Wmissing-declarations -Wunused -Wpointer-arith -Wwrite-strings -Wnested-externs -Wno-sign-compare -c cddb.c
cddb.c: In function `init_cddb':
cddb.c:120: Fehler: Dereferenzierung eines Zeigers auf unvollständigen Typen
cddb.c:124: Fehler: Dereferenzierung eines Zeigers auf unvollständigen Typen
make[3]: *** [cddb.o] Fehler 1
make[3]: Leaving directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73/src'
make[2]: *** [all-recursive] Fehler 1
make[2]: Leaving directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73/src'
make[1]: *** [all-recursive] Fehler 1
make[1]: Leaving directory `/var/tmp/portage/libcdio-0.73/work/libcdio-0.73'
make: *** [all] Fehler 2

!!! ERROR: dev-libs/libcdio-0.73 failed.
Call stack:
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  libcdio-0.73.ebuild, line 39:   Called die

!!! (no error message)
!!! If you need support, post the topmost build error, and the call stack if relevant.