Add JE_RUNNABLE() and use it for os_unfair_lock_*() test.

This resolves #494.
This commit is contained in:
Jason Evans 2016-11-12 09:47:07 -08:00
parent c25e711cf9
commit a2e601a223

View File

@ -43,6 +43,17 @@ AC_CACHE_CHECK([whether $1 is compilable],
[$4=no])])
])
dnl JE_RUNNABLE(label, hcode, mcode, rvar)
AC_DEFUN([JE_RUNNABLE],
[
AC_CACHE_CHECK([whether $1 is runnable],
[$4],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([$2],
[$3])],
[$4=yes],
[$4=no])])
])
dnl ============================================================================
CONFIG=`echo ${ac_configure_args} | sed -e 's#'"'"'\([^ ]*\)'"'"'#\1#g'`
@ -1649,7 +1660,11 @@ fi
dnl ============================================================================
dnl Check for os_unfair_lock operations as provided on Darwin.
JE_COMPILABLE([Darwin os_unfair_lock_*()], [
dnl Run the test program rather than merely compiling so that dyld lazy symbol
dnl binding doesn't result in a false positive if building with a version of
dnl XCode (>7) that supports the API on a system that is too old to actually
dnl implement it (<10.12).
JE_RUNNABLE([Darwin os_unfair_lock_*()], [
#include <os/lock.h>
], [
os_unfair_lock lock = OS_UNFAIR_LOCK_INIT;