53ed647b22
This patch adds a small autoconf M4 library which deals with auto-detected features. The default for those features is "auto", which is like the old default: if the library is present on the system, enable the feature, disable otherwise. If the user explicitly enables that feature (--enable-alsa), and the library is not present, configure must fail, because it cannot fulfill the request.
41 lines
744 B
Plaintext
41 lines
744 B
Plaintext
AC_DEFUN([MPD_AUTO_ENABLED], [
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var="enable_$1"
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feature="$2"
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if eval "test x`echo '$'$var` = xauto"; then
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AC_MSG_NOTICE([auto-detected $feature])
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eval "$var=yes"
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fi
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])
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AC_DEFUN([MPD_AUTO_DISABLED], [
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var="enable_$1"
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feature="$2"
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msg="$3"
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if eval "test x`echo '$'$var` = xauto"; then
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AC_MSG_WARN([$msg -- disabling $feature])
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eval "$var=no"
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else
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AC_MSG_ERROR([$msg])
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fi
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])
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AC_DEFUN([MPD_AUTO_RESULT], [
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name="$1"
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var="enable_$1"
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found="found_$name"
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feature="$2"
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msg="$3"
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if eval "test x`echo '$'$var` = xno"; then
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eval "$found=no"
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fi
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if eval "test x`echo '$'$found` = xyes"; then
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MPD_AUTO_ENABLED([$name], [$feature])
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else
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MPD_AUTO_DISABLED([$name], [$feature], [$msg])
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fi
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])
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