Add JE_RUNNABLE() and use it for os_unfair_lock_*() test.
This resolves #494.
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17
configure.ac
17
configure.ac
@ -43,6 +43,17 @@ AC_CACHE_CHECK([whether $1 is compilable],
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[$4=no])])
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])
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dnl JE_RUNNABLE(label, hcode, mcode, rvar)
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AC_DEFUN([JE_RUNNABLE],
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[
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AC_CACHE_CHECK([whether $1 is runnable],
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[$4],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([$2],
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[$3])],
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[$4=yes],
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[$4=no])])
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])
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dnl ============================================================================
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CONFIG=`echo ${ac_configure_args} | sed -e 's#'"'"'\([^ ]*\)'"'"'#\1#g'`
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@ -1679,7 +1690,11 @@ fi
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dnl ============================================================================
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dnl Check for os_unfair_lock operations as provided on Darwin.
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JE_COMPILABLE([Darwin os_unfair_lock_*()], [
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dnl Run the test program rather than merely compiling so that dyld lazy symbol
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dnl binding doesn't result in a false positive if building with a version of
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dnl XCode (>7) that supports the API on a system that is too old to actually
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dnl implement it (<10.12).
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JE_RUNNABLE([Darwin os_unfair_lock_*()], [
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#include <os/lock.h>
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], [
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os_unfair_lock lock = OS_UNFAIR_LOCK_INIT;
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