Copied from Debian.

Description: Explicitely link against -lm
Bug-Debian: http://bugs.debian.org/553595
Author: Fabian Greffrath <fabian@debian-unofficial.org>, Dmitrijs Ledkovs <dmitrij.ledkov@gmail.com>

---
 libao/Makefile.am |    1 +
 src/Makefile.am   |    2 +-
 2 files changed, 2 insertions(+), 1 deletions(-)

--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1,9 +1,9 @@
-CFLAGS = @A52DEC_CFLAGS@
+AM_CFLAGS = @A52DEC_CFLAGS@
 
 bin_PROGRAMS = a52dec extract_a52
 a52dec_SOURCES = a52dec.c getopt.c gettimeofday.c
 a52dec_LDADD = $(top_builddir)/liba52/liba52.la \
-	       $(top_builddir)/libao/libao.a @LIBAO_LIBS@
+	       $(top_builddir)/libao/libao.a @LIBAO_LIBS@ -lm
 extract_a52_SOURCES = extract_a52.c getopt.c
 
 man_MANS = a52dec.1 extract_a52.1
--- a/liba52/Makefile.am
+++ b/liba52/Makefile.am
@@ -1,4 +1,4 @@
-CFLAGS = @CFLAGS@ @LIBA52_CFLAGS@
+AM_CFLAGS = @CFLAGS@ @LIBA52_CFLAGS@
 
 lib_LTLIBRARIES = liba52.la
 
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<div class='path'>path: <a href='/guix/log/?id=acb08304c862d65679086a9f160240bfd598289d'>root</a>/<a href='/guix/log/tests?id=acb08304c862d65679086a9f160240bfd598289d'>tests</a>/<a href='/guix/log/tests/guix-pack.sh?id=acb08304c862d65679086a9f160240bfd598289d'>guix-pack.sh</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/tests/guix-pack.sh?id=acb08304c862d65679086a9f160240bfd598289d&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-05-25 09:28:43 +0200'>2022-05-25</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=d276a7dd6162d101b7790cc8ea902abfec1eafcb'>tests: Fix wrong target triplets.</a><span class='msg-avail'>...</span></td><td>Josselin Poiret</td></tr>
<tr><td><span title='2022-02-18 14:14:38 +0100'>2022-02-18</span></td><td><a href='/guix/commit/tests/guix-pack.sh?id=5a57313918a5c1bd5cf8238c2dcae64a03523952'>profiles: 'profile-derivation' rejects unsupported packages.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>