You receive this bug because this package does not respect my system's CFLAGS The possible solutions to fix this issue are: 1)Fix the buildsystem, if you can 2)inherit toolchain-funcs and use emake CFLAGS="${CFLAGS}" (if it does not break) x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c bitstream.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c decode.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c imdct.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c coeff.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c exponent.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c stats.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c bit_allocate.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c parse.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c crc.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c debug.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c rematrix.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c downmix.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c dither.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O1 -g -c sanity_check.c x86_64-pc-linux-gnu-gcc -DHAVE_CONFIG_H -I. -I.. -Wall -O3 -g -c extract_ac3.c x86_64-pc-linux-gnu-gcc -Wall -O3 -g -Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu -o extract_ac3 extract_ac3.o -lasound -lm -ldl -lpthread
*** Bug 426790 has been marked as a duplicate of this bug. ***
In alsa-tools-1.0.27 the ac3_extract utility is no longer built, thus this issue should also be gone Closing -> Fixed by 1.0.27