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1 | ############################################################################## |
2 | dnl Configure Paths for Alsa |
3 | dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org> |
4 | dnl Christopher Lansdown <lansdoct@cs.alfred.edu> |
5 | dnl Jaroslav Kysela <perex@suse.cz> |
6 | dnl Last modification: alsa.m4,v 1.23 2004/01/16 18:14:22 tiwai Exp |
7 | dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]]) |
8 | dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate. |
9 | dnl enables arguments --with-alsa-prefix= |
10 | dnl --with-alsa-enc-prefix= |
11 | dnl --disable-alsatest |
12 | dnl |
13 | dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified, |
14 | dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result. |
15 | dnl |
16 | AC_DEFUN([AM_PATH_ALSA], |
17 | [dnl Save the original CFLAGS, LDFLAGS, and LIBS |
18 | alsa_save_CFLAGS="$CFLAGS" |
19 | alsa_save_LDFLAGS="$LDFLAGS" |
20 | alsa_save_LIBS="$LIBS" |
21 | alsa_found=yes |
22 | |
23 | dnl |
24 | dnl Get the cflags and libraries for alsa |
25 | dnl |
26 | AC_ARG_WITH(alsa-prefix, |
27 | [ --with-alsa-prefix=PFX Prefix where Alsa library is installed(optional)], |
28 | [alsa_prefix="$withval"], [alsa_prefix=""]) |
29 | |
30 | AC_ARG_WITH(alsa-inc-prefix, |
31 | [ --with-alsa-inc-prefix=PFX Prefix where include libraries are (optional)], |
32 | [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""]) |
33 | |
34 | dnl FIXME: this is not yet implemented |
35 | AC_ARG_ENABLE(alsatest, |
36 | [ --disable-alsatest Do not try to compile and run a test Alsa program], |
37 | [enable_alsatest="$enableval"], |
38 | [enable_alsatest=yes]) |
39 | |
40 | dnl Add any special include directories |
41 | AC_MSG_CHECKING(for ALSA CFLAGS) |
42 | if test "$alsa_inc_prefix" != "" ; then |
43 | ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix" |
44 | CFLAGS="$CFLAGS -I$alsa_inc_prefix" |
45 | fi |
46 | AC_MSG_RESULT($ALSA_CFLAGS) |
47 | |
48 | dnl add any special lib dirs |
49 | AC_MSG_CHECKING(for ALSA LDFLAGS) |
50 | if test "$alsa_prefix" != "" ; then |
51 | ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix" |
52 | LDFLAGS="$LDFLAGS $ALSA_LIBS" |
53 | fi |
54 | |
55 | dnl add the alsa library |
56 | ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread" |
57 | LIBS=`echo $LIBS | sed 's/-lm//'` |
58 | LIBS=`echo $LIBS | sed 's/-ldl//'` |
59 | LIBS=`echo $LIBS | sed 's/-lpthread//'` |
60 | LIBS=`echo $LIBS | sed 's/ //'` |
61 | LIBS="$ALSA_LIBS $LIBS" |
62 | AC_MSG_RESULT($ALSA_LIBS) |
63 | |
64 | dnl Check for a working version of libasound that is of the right version. |
65 | min_alsa_version=ifelse([$1], ,0.1.1,$1) |
66 | AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version) |
67 | no_alsa="" |
68 | alsa_min_major_version=`echo $min_alsa_version | \ |
69 | sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'` |
70 | alsa_min_minor_version=`echo $min_alsa_version | \ |
71 | sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'` |
72 | alsa_min_micro_version=`echo $min_alsa_version | \ |
73 | sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'` |
74 | |
75 | AC_LANG_SAVE |
76 | AC_LANG_C |
77 | AC_TRY_COMPILE([ |
78 | #include <alsa/asoundlib.h> |
79 | ], [ |
80 | /* ensure backward compatibility */ |
81 | #if !defined(SND_LIB_MAJOR) && defined(SOUNDLIB_VERSION_MAJOR) |
82 | #define SND_LIB_MAJOR SOUNDLIB_VERSION_MAJOR |
83 | #endif |
84 | #if !defined(SND_LIB_MINOR) && defined(SOUNDLIB_VERSION_MINOR) |
85 | #define SND_LIB_MINOR SOUNDLIB_VERSION_MINOR |
86 | #endif |
87 | #if !defined(SND_LIB_SUBMINOR) && defined(SOUNDLIB_VERSION_SUBMINOR) |
88 | #define SND_LIB_SUBMINOR SOUNDLIB_VERSION_SUBMINOR |
89 | #endif |
90 | |
91 | # if(SND_LIB_MAJOR > $alsa_min_major_version) |
92 | exit(0); |
93 | # else |
94 | # if(SND_LIB_MAJOR < $alsa_min_major_version) |
95 | # error not present |
96 | # endif |
97 | |
98 | # if(SND_LIB_MINOR > $alsa_min_minor_version) |
99 | exit(0); |
100 | # else |
101 | # if(SND_LIB_MINOR < $alsa_min_minor_version) |
102 | # error not present |
103 | # endif |
104 | |
105 | # if(SND_LIB_SUBMINOR < $alsa_min_micro_version) |
106 | # error not present |
107 | # endif |
108 | # endif |
109 | # endif |
110 | exit(0); |
111 | ], |
112 | [AC_MSG_RESULT(found.)], |
113 | [AC_MSG_RESULT(not present.) |
114 | ifelse([$3], , [AC_MSG_ERROR(Sufficiently new version of libasound not found.)]) |
115 | alsa_found=no] |
116 | ) |
117 | AC_LANG_RESTORE |
118 | |
119 | dnl Now that we know that we have the right version, let's see if we have the library and not just the headers. |
120 | if test "x$enable_alsatest" = "xyes"; then |
121 | AC_CHECK_LIB([asound], [snd_ctl_open],, |
122 | [ifelse([$3], , [AC_MSG_ERROR(No linkable libasound was found.)]) |
123 | alsa_found=no] |
124 | ) |
125 | fi |
126 | |
127 | if test "x$alsa_found" = "xyes" ; then |
128 | ifelse([$2], , :, [$2]) |
129 | LIBS=`echo $LIBS | sed 's/-lasound//g'` |
130 | LIBS=`echo $LIBS | sed 's/ //'` |
131 | LIBS="-lasound $LIBS" |
132 | fi |
133 | if test "x$alsa_found" = "xno" ; then |
134 | ifelse([$3], , :, [$3]) |
135 | CFLAGS="$alsa_save_CFLAGS" |
136 | LDFLAGS="$alsa_save_LDFLAGS" |
137 | LIBS="$alsa_save_LIBS" |
138 | ALSA_CFLAGS="" |
139 | ALSA_LIBS="" |
140 | fi |
141 | |
142 | dnl That should be it. Now just export out symbols: |
143 | AC_SUBST(ALSA_CFLAGS) |
144 | AC_SUBST(ALSA_LIBS) |
145 | ]) |