1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
|
dnl Configure Paths for Alsa
dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>
dnl Christopher Lansdown <lansdoct@cs.alfred.edu>
dnl Jaroslav Kysela <perex@perex.cz>
dnl Last modification: $Id: alsa.m4,v 1.24 2004/09/15 18:48:07 tiwai Exp $
dnl
dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for libasound, and define ALSA_CFLAGS, ALSA_LIBS and
dnl ALSA_TOPOLOGY_LIBS as appropriate.
dnl
dnl enables arguments --with-alsa-prefix=
dnl --with-alsa-inc-prefix=
dnl --disable-alsatest
dnl
dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,
dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.
dnl
AC_DEFUN([AM_PATH_ALSA],
[dnl Save the original CFLAGS, LDFLAGS, and LIBS
alsa_save_CFLAGS="$CFLAGS"
alsa_save_LDFLAGS="$LDFLAGS"
alsa_save_LIBS="$LIBS"
alsa_found=yes
alsa_topology_found=no
dnl
dnl Get the cflags and libraries for alsa
dnl
AC_ARG_WITH(alsa-prefix,
AS_HELP_STRING([--with-alsa-prefix=PFX], [Prefix where Alsa library is installed(optional)]),
[alsa_prefix="$withval"], [alsa_prefix=""])
AC_ARG_WITH(alsa-inc-prefix,
AS_HELP_STRING([--with-alsa-inc-prefix=PFX], [Prefix where include libraries are (optional)]),
[alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
AC_ARG_ENABLE(alsa-topology,
AS_HELP_STRING([--enable-alsatopology], [Force to use the Alsa topology library]),
[enable_atopology="$enableval"],
[enable_atopology=no])
AC_ARG_ENABLE(alsatest,
AS_HELP_STRING([--disable-alsatest], [Do not try to compile and run a test Alsa program]),
[enable_alsatest="$enableval"],
[enable_alsatest=yes])
dnl Add any special include directories
AC_MSG_CHECKING(for ALSA CFLAGS)
if test "$alsa_inc_prefix" != "" ; then
ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
CFLAGS="$CFLAGS -I$alsa_inc_prefix"
fi
AC_MSG_RESULT($ALSA_CFLAGS)
AC_CHECK_LIB(c, dlopen, LIBDL="", [AC_CHECK_LIB(dl, dlopen, LIBDL="-ldl")])
dnl add any special lib dirs
AC_MSG_CHECKING(for ALSA LDFLAGS)
if test "$alsa_prefix" != "" ; then
ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
LDFLAGS="$LDFLAGS $ALSA_LIBS"
fi
dnl add the alsa library
ALSA_LIBS="$ALSA_LIBS -lasound -lm $LIBDL -lpthread"
LIBS="$ALSA_LIBS $LIBS"
AC_MSG_RESULT($ALSA_LIBS)
dnl Check for a working version of libasound that is of the right version.
if test "x$enable_alsatest" = "xyes"; then
AC_MSG_CHECKING([required libasound headers version])
min_alsa_version=ifelse([$1], , 0.1.1, $1)
no_alsa=""
alsa_min_major_version=`echo $min_alsa_version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
alsa_min_minor_version=`echo $min_alsa_version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
alsa_min_micro_version=`echo $min_alsa_version | \
sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
AC_MSG_RESULT($alsa_min_major_version.$alsa_min_minor_version.$alsa_min_micro_version)
AC_LANG_PUSH([C])
AC_MSG_CHECKING([for libasound headers version >= $alsa_min_major_version.$alsa_min_minor_version.$alsa_min_micro_version ($min_alsa_version)])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <alsa/asoundlib.h>
#include <stdlib.h>
]], [[
/* ensure backward compatibility */
#if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR)
#define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR
#endif
#if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR)
#define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR
#endif
#if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR)
#define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR
#endif
# if(SND_LIB_MAJOR > $alsa_min_major_version)
exit(0);
# else
# if(SND_LIB_MAJOR < $alsa_min_major_version)
# error not present
# endif
# if(SND_LIB_MINOR > $alsa_min_minor_version)
exit(0);
# else
# if(SND_LIB_MINOR < $alsa_min_minor_version)
# error not present
# endif
# if(SND_LIB_SUBMINOR < $alsa_min_micro_version)
# error not present
# endif
# endif
# endif
exit(0);
]])],
[AC_MSG_RESULT(found.)],
[AC_MSG_RESULT(not present.)
ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)])
alsa_found=no]
)
AC_LANG_POP([C])
AC_LANG_PUSH([C])
AC_MSG_CHECKING([for libatopology (sound headers version > 1.1.9)])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <alsa/asoundlib.h>
#include <alsa/topology.h>
#include <stdlib.h>
]], [[
/* ensure backward compatibility */
#if !defined(SND_LIB_VERSION)
#define SND_LIB_VERSION 0
#endif
#if SND_LIB_VERSION > 0x00010109
exit(0);
#else
# error not present
#endif
exit(0);
]])],
[AC_MSG_RESULT(yes)
enable_atopology="yes"],
[AC_MSG_RESULT(no)]
)
AC_LANG_POP([C])
fi
dnl Now that we know that we have the right version, let's see if we have the library and not just the headers.
if test "x$enable_alsatest" = "xyes"; then
AC_CHECK_LIB([asound], [snd_ctl_open],,
[ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)])
alsa_found=no]
)
if test "x$enable_atopology" = "xyes"; then
alsa_topology_found=yes
alsa_save_LIBS2="$LIBS"
AC_CHECK_LIB([atopology], [snd_tplg_new],,
[ifelse([$3], , [AC_MSG_ERROR(No linkable libatopology was found.)])
alsa_topology_found=no,
]
)
LIBS="$alsa_save_LIBS2"
fi
else
if test "x$enable_atopology" = "xyes"; then
alsa_topology_found=yes
fi
fi
if test "x$alsa_found" = "xyes" ; then
ifelse([$2], , :, [$2])
LIBS=`echo $LIBS | sed 's/-lasound//g'`
LIBS=`echo $LIBS | sed 's/ //'`
LIBS="-lasound $LIBS"
fi
if test "x$alsa_found" = "xno" ; then
ifelse([$3], , :, [$3])
CFLAGS="$alsa_save_CFLAGS"
LDFLAGS="$alsa_save_LDFLAGS"
LIBS="$alsa_save_LIBS"
ALSA_CFLAGS=""
ALSA_LIBS=""
ALSA_TOPOLOGY_LIBS=""
fi
dnl add the alsa topology library; must be at the end
AC_MSG_CHECKING(for ALSA topology LDFLAGS)
if test "x$alsa_topology_found" = "xyes"; then
ALSA_TOPOLOGY_LIBS="$ALSA_TOPOLOGY_LIBS -latopology"
fi
AC_MSG_RESULT($ALSA_TOPOLOGY_LIBS)
dnl That should be it. Now just export out symbols:
AC_SUBST(ALSA_CFLAGS)
AC_SUBST(ALSA_LIBS)
AC_SUBST(ALSA_TOPOLOGY_LIBS)
])
|
