alsa-lib/acinclude.m4

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dnl Check for ALSA driver package.
AC_DEFUN(ALSA_CHECK_DRIVER, [
myprefix=$prefix
if test "$myprefix" = "NONE"; then
myprefix=$ac_default_prefix
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fi
OLD_CFLAGS="$CFLAGS"
CFLAGS="-I$myprefix/include"
AC_MSG_CHECKING(for alsa-driver package)
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AC_TRY_COMPILE([
#include <linux/asound.h>
],[
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void main(void)
{
#if !defined( SND_PROTOCOL_VERSION ) || !defined( SND_PROTOCOL_UNCOMPATIBLE )
#error not found
#else
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exit(0);
#endif
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}
],
AC_MSG_RESULT(present),
[AC_MSG_RESULT(not found);
AC_MSG_ERROR([Install alsa-driver v0.2.0pre6+ package first...])]
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)
CFLAGS="$OLD_CFLAGS"
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])