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# -*- Autoconf -*-
AC_DEFUN([RUBY_DTRACE_AVAILABLE],
[AC_CACHE_CHECK(whether dtrace USDT is available, rb_cv_dtrace_available,
[
echo "provider conftest{ probe fire(); };" > conftest_provider.d
rb_cv_dtrace_available=no
AS_FOR(opt, rb_dtrace_opt, ["-xnolibs" ""], [dnl
AS_IF([$DTRACE opt -h -o conftest_provider.h -s conftest_provider.d >/dev/null 2>/dev/null],
[], [continue])
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[@%:@include "conftest_provider.h"]], [[CONFTEST_FIRE();]])],
[], [continue])
# DTrace is available on the system
rb_cv_dtrace_available=yes${rb_dtrace_opt:+"(opt)"}
break
])
rm -f conftest.[co] conftest_provider.[dho]
])
AS_CASE(["$rb_cv_dtrace_available"], ["yes("*")"],
[DTRACE_OPT=`expr "$rb_cv_dtrace_available" : "yes(\(.*\))"`])
])dnl
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