On Thu, Jan 04, 2007 at 07:21:40PM +0000, Paul Brook wrote:
>On Thursday 04 January 2007 15:02, Bernhard Fischer wrote:
>> Hi,
>>
>> This patchlet adds a check to configure that makes sure that we have a
>> working alsa setup.
>>
>> Previously, if --enable-alsa was given but the user forgot to install
>> the alsa libs proper, the build failed later on due to eventually
>> missing libs. The patch makes sure that the user can spot that alsa
>> support was turned off after configuration completed.
>
>This is wrong. If the user requests alsa we should honour that request, or
>fail trying. We should never quietly ignore an explicit user decision.
>
>Making configure fail early with an error is acceptable (as it the current
>link failure). Ignoring --enable-alsa is not.
Fair enough. Updated variant prints an error if the compile-check
failed.
--- ../qemu_trunk.orig/configure 2007-01-04 14:38:58.000000000 +0100
+++ configure 2007-01-04 20:46:22.000000000 +0100
@@ -509,6 +536,25 @@ fi # sdl compile test
fi # cross compilation
fi # -z $sdl
+##########################################
+# sound support libraries
+# alsa
+if test "$alsa" = "yes" ; then
+ cat > $TMPC << EOF
+#include <alsa/asoundlib.h>
+int main(void) { snd_pcm_t **handle; return snd_pcm_close(*handle); }
+EOF
+ if $cc -o $TMPE $TMPC -lasound 2> /dev/null ; then
+ :
+ else
+ echo
+ echo "Error: Could not find alsa"
+ echo "Make sure to have the alsa libs and headers installed."
+ echo
+ exit 1
+ fi
+fi # alsa
+
# Check if tools are available to build documentation.
if [ -x "`which texi2html`" ] && [ -x "`which pod2man`" ]; then
build_docs="yes"
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