liba52 is a free library for decoding ATSC A/52 (also known as AC-3) streams. The A/52 standard is used in a variety of applications, including digital television and DVD.
Development versions of BLFS may not build or run some packages properly if LFS or dependencies have been updated since the most recent stable versions of the books.
Download (HTTP): https://liba52.sourceforge.net/files/a52dec-0.7.4.tar.gz
Download MD5 sum: caa9f5bc44232dc8aeea773fea56be80
Download size: 236 KB
Estimated disk space required: 2.5 MB
Estimated build time: less than 0.1 SBU
Editor Notes: https://wiki.linuxfromscratch.org/blfs/wiki/liba52
Install liba52 by running the following commands:
./configure --prefix=/usr \ --mandir=/usr/share/man \ --enable-shared \ --disable-static \ CFLAGS="${CFLAGS:--g -O3} -fPIC" && make
To test the results, issue: make check.
Now, as the root
user:
make install && cp liba52/a52_internal.h /usr/include/a52dec && install -v -m644 -D doc/liba52.txt \ /usr/share/doc/liba52-0.7.4/liba52.txt
CFLAGS="${CFLAGS:--g -O3} -fPIC"
: This appends -fPIC
to CFLAGS
but use -g -O3
(the default of this package) instead of an empty string when CFLAGS
is not set. This is needed to compile liba52 without runtime text relocation. Runtime text relocation is prohibited on x86_64 so -fPIC
is strictly required. On 32-bit x86 runtime text relocation is allowed but it's insecure and it may waste physical RAM, so -fPIC
is still better.
--disable-static
: This switch prevents installation of static versions of the libraries.
cp liba52/a52_internal.h ...: Copying this header file into /usr/include/a52dec allows some other programs (such as xine-lib) to compile and link against a system installed liba52.