From 957ebce3837588f71016e37ffaf9aad0a9d41cec Mon Sep 17 00:00:00 2001
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From: Tanu Kaskinen <tanuk@iki.fi>
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Date: Fri, 23 Sep 2016 12:02:06 +0300
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Subject: [PATCH] configure.ac: improve alsa handling
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Three improvements:
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1) "--enable-alsa" or "--disable-alsa" caused a warning about an
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unsupported configure option, because AC_ARG_ENABLE was not used.
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2) If alsa was disabled, the "Have ALSA" item in the summary would print
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an empty string instead of "no".
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3) If "--enable-alsa" was passed to configure, but the headers were not
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found, configure would still succeed (with alsa disabled). It's better
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to fail and abort configure if a feature that was explicitly requested
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can't be enabled.
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Upstream-Status: Submitted [sent to src@mega-nerd.com]
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Signed-off-by: Tanu Kaskinen <tanuk@iki.fi>
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---
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configure.ac | 9 ++++++++-
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1 file changed, 8 insertions(+), 1 deletion(-)
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diff --git a/configure.ac b/configure.ac
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index 474c6ab..bad597e 100644
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--- a/configure.ac
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+++ b/configure.ac
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@@ -101,6 +101,9 @@ AC_ARG_ENABLE(cpu-clip,
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AC_HELP_STRING([--disable-cpu-clip], [disable tricky cpu specific clipper]),
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ac_arg_cpu_clip="N", ac_arg_cpu_clip="Y")
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+AC_ARG_ENABLE(alsa,
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+ AC_HELP_STRING([--disable-alsa], [disable ALSA support in the varispeed-play example program]))
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+
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#====================================================================================
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# Check types and their sizes.
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@@ -194,6 +197,10 @@ if test x$enable_alsa != xno ; then
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if test x$ac_cv_header_alsa_asoundlib_h = xyes ; then
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ALSA_LIBS="-lasound"
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enable_alsa=yes
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+ elif test x$enable_alsa = xyes ; then
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+ AC_MSG_ERROR(["ALSA headers not found"])
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+ else
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+ enable_alsa=no
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fi
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fi
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@@ -340,7 +347,7 @@ AC_MSG_RESULT([
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Have FFTW : ................... ${ac_cv_fftw3}])
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AC_MSG_RESULT([ Have libsndfile : ............. ${ac_cv_sndfile}])
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-AC_MSG_RESULT([ Have ALSA : ................... ${ac_cv_header_alsa_asoundlib_h}
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+AC_MSG_RESULT([ Have ALSA : ................... ${enable_alsa}
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])
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AC_MSG_RESULT([ Installation directories :
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--
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2.9.3
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