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Split acinclude.m4 into its constituent parts for easy upgrading
author Sam Lantinga <slouken@libsdl.org>
date Sun, 04 Oct 2009 20:44:04 +0000
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3341:710139a1692d 3342:3da232c5980a
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 ])