1dnl Configure Paths for Alsa
2dnl Some modifications by Richard Boulton <richard-alsa@tartarus.org>
3dnl Christopher Lansdown <lansdoct@cs.alfred.edu>
4dnl Jaroslav Kysela <perex@suse.cz>
5dnl Modified for TiMidity++ by URABE, Shyouhei <root@mput.dip.jp>
6dnl Original    : alsa.m4,v 1.22 2002/05/27 11:14:20 tiwai Exp
7dnl This version: alsa.m4,       2002/10/08 22:30:18 JST
8dnl AM_PATH_ALSA([MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
9dnl Test for libasound, and define ALSA_CFLAGS and ALSA_LIBS as appropriate.
10dnl enables arguments --with-alsa-prefix=
11dnl                   --with-alsa-enc-prefix=
12dnl                   --disable-alsatest  (this has no effect, as yet)
13dnl
14dnl For backwards compatibility, if ACTION_IF_NOT_FOUND is not specified,
15dnl and the alsa libraries are not found, a fatal AC_MSG_ERROR() will result.
16dnl
17AC_DEFUN([AM_PATH_ALSA],
18[dnl Save the original CFLAGS, LDFLAGS, and LIBS
19alsa_save_CFLAGS="$CFLAGS"
20alsa_save_LDFLAGS="$LDFLAGS"
21alsa_save_LIBS="$LIBS"
22alsa_found=yes
23
24dnl
25dnl Get the cflags and libraries for alsa
26dnl
27AC_ARG_WITH(alsa-prefix,
28	    AS_HELP_STRING([--with-alsa-prefix=PFX],
29	    		   [Prefix where Alsa library is installed(optional)]),
30	    [alsa_prefix="$withval"], [alsa_prefix=""])
31
32AC_ARG_WITH(alsa-inc-prefix,
33	    AS_HELP_STRING([--with-alsa-inc-prefix=PFX],
34	    		   [Prefix where include libraries are (optional)]),
35	    [alsa_inc_prefix="$withval"], [alsa_inc_prefix=""])
36
37dnl FIXME: this is not yet implemented
38AC_ARG_ENABLE(alsatest,
39	      AS_HELP_STRING([--disable-alsatest],
40	      		     [Do not try to compile and run a test Alsa program]),
41	      [enable_alsatest=no], [enable_alsatest=yes])
42
43dnl Add any special include directories
44AC_MSG_CHECKING(for ALSA CFLAGS)
45if test "$alsa_inc_prefix" != "" ; then
46	ALSA_CFLAGS="$ALSA_CFLAGS -I$alsa_inc_prefix"
47	CFLAGS="$CFLAGS -I$alsa_inc_prefix"
48fi
49AC_MSG_RESULT($ALSA_CFLAGS)
50
51dnl add any special lib dirs
52AC_MSG_CHECKING(for ALSA LDFLAGS)
53if test "$alsa_prefix" != "" ; then
54	ALSA_LIBS="$ALSA_LIBS -L$alsa_prefix"
55	LDFLAGS="$LDFLAGS $ALSA_LIBS"
56fi
57
58dnl add the alsa library
59ALSA_LIBS="$ALSA_LIBS -lasound -lm -ldl -lpthread"
60LIBS=`echo $LIBS | sed 's/-lm//'`
61LIBS=`echo $LIBS | sed 's/-ldl//'`
62LIBS=`echo $LIBS | sed 's/-lpthread//'`
63LIBS=`echo $LIBS | sed 's/  //'`
64LIBS="$ALSA_LIBS $LIBS"
65AC_MSG_RESULT($ALSA_LIBS)
66
67dnl Check for a working version of libasound that is of the right version.
68min_alsa_version=ifelse([$1], ,0.1.1,$1)
69AC_MSG_CHECKING(for libasound headers version >= $min_alsa_version)
70no_alsa=""
71    alsa_min_major_version=`echo $min_alsa_version | \
72           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\1/'`
73    alsa_min_minor_version=`echo $min_alsa_version | \
74           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\2/'`
75    alsa_min_micro_version=`echo $min_alsa_version | \
76           sed 's/\([[0-9]]*\).\([[0-9]]*\).\([[0-9]]*\)/\3/'`
77
78dnl This is the test program.
79AC_DEFUN([MPUT_ALSA_TRY],[
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
110exit(0);
111])dnl macro MPUT_ALSA_TRY
112
113AC_LANG_SAVE
114AC_LANG_C
115AC_TRY_COMPILE([
116#include <alsa/asoundlib.h>
117],
118  MPUT_ALSA_TRY(),
119  [AC_MSG_RESULT(found.)],
120  [AC_TRY_COMPILE([
121#include <sys/asoundlib.h>
122],
123  MPUT_ALSA_TRY(),
124  [AC_MSG_RESULT(found.)],
125  [AC_MSG_RESULT(not present.)
126   ifelse([$3], ,[AC_MSG_RESULT(libasound was not found anywhere.)])
127   alsa_found=no])
128   ifelse([$3], ,[AC_MSG_RESULT(Sufficiently new version of libasound not found.)])
129])
130AC_LANG_RESTORE
131
132dnl Now that we know we have the right version, why not see if we
133dnl have the library and not just the headers.
134AC_CHECK_LIB([asound],[snd_ctl_open], ,
135  [ifelse([$3], ,[AC_MSG_RESULT(No linkable libasound was found.)])
136   alsa_found=no
137])
138
139if test "x$alsa_found" = "xyes" ; then
140   ifelse([$2], , :, [$2])
141   LIBS=`echo $LIBS | sed 's/-lasound//g'`
142   LIBS=`echo $LIBS | sed 's/  //'`
143   LIBS="-lasound $LIBS"
144else
145   ifelse([$3], , :, [$3])
146   CFLAGS="$alsa_save_CFLAGS"
147   LDFLAGS="$alsa_save_LDFLAGS"
148   LIBS="$alsa_save_LIBS"
149   ALSA_CFLAGS=""
150   ALSA_LIBS=""
151fi
152
153dnl That should be it.  Now just export out symbols:
154AC_SUBST(ALSA_CFLAGS)
155AC_SUBST(ALSA_LIBS)
156])
157