Fix build with softfloat option

Fix build of alsa-lib when --with-softfloat is used:
 - disable ladspa plugin
 - don't use sqrt() function

Signed-off-by: Takashi Iwai <tiwai@suse.de>

2 files changed, 9 insertions, 0 deletions

diff --git a/configure.in b/configure.in
index 9a71d95c..ea6a8a0e 100644
--- a/configure.in
+++ b/configure.in
@@ -367,6 +367,7 @@ AC_ARG_ENABLE(seq,
 AC_ARG_ENABLE(alisp,
   AS_HELP_STRING([--disable-alisp], [disable the alisp component]),
   [build_alisp="$enableval"], [build_alisp="yes"])
+test "$softfloat" = "yes" && build_alisp="no"
 AC_ARG_ENABLE(old-symbols,
   AS_HELP_STRING([--disable-old-symbols], [disable old obsoleted symbols]),
   [keep_old_symbols="$enableval"], [keep_old_symbols="yes"])
@@ -474,6 +475,7 @@ fi
 
 if test "$softfloat" = "yes"; then
   build_pcm_lfloat="no"
+  build_pcm_ladspa="no"
 fi
 
 AM_CONDITIONAL(BUILD_PCM_PLUGIN, test x$build_pcm_plugin = xyes)
diff --git a/src/mixer/simple_none.c b/src/mixer/simple_none.c
index 0f4dd3a1..48022004 100644
--- a/src/mixer/simple_none.c
+++ b/src/mixer/simple_none.c
@@ -1450,7 +1450,14 @@ static int simple_add1(snd_mixer_class_t *class, const char *name,
 		}
 		if (ctype != SND_CTL_ELEM_TYPE_BOOLEAN)
 			return 0;
+#ifdef HAVE_SOFT_FLOAT
+		/* up to 256 channels */
+		for (n = 1; n < 256; n++)
+			if (n * n == values)
+				break;
+#else
 		n = sqrt((double)values);
+#endif
 		if (n * n != values)
 			return 0;
 		values = n;