116038816SMartin Matuskadnl # 2*3f9d360cSMartin Matuskadnl # If -latomic exists and atomic.c doesn't link without it, 3*3f9d360cSMartin Matuskadnl # it's needed for __atomic intrinsics. 416038816SMartin Matuskadnl # 516038816SMartin MatuskaAC_DEFUN([ZFS_AC_CONFIG_USER_LIBATOMIC], [ 6*3f9d360cSMartin Matuska AC_MSG_CHECKING([whether -latomic is required]) 716038816SMartin Matuska 816038816SMartin Matuska saved_libs="$LIBS" 916038816SMartin Matuska LIBS="$LIBS -latomic" 10*3f9d360cSMartin Matuska LIBATOMIC_LIBS="" 1116038816SMartin Matuska 1216038816SMartin Matuska AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ 13*3f9d360cSMartin Matuska LIBS="$saved_libs" 14*3f9d360cSMartin Matuska saved_cflags="$CFLAGS" 15*3f9d360cSMartin Matuska CFLAGS="$CFLAGS -isystem lib/libspl/include" 16*3f9d360cSMartin Matuska AC_LINK_IFELSE([AC_LANG_PROGRAM([#include "lib/libspl/atomic.c"], [])], [], [LIBATOMIC_LIBS="-latomic"]) 17*3f9d360cSMartin Matuska CFLAGS="$saved_cflags" 1816038816SMartin Matuska ]) 1916038816SMartin Matuska 20*3f9d360cSMartin Matuska if test -n "$LIBATOMIC_LIBS"; then 21*3f9d360cSMartin Matuska AC_MSG_RESULT([yes]) 22*3f9d360cSMartin Matuska else 23*3f9d360cSMartin Matuska AC_MSG_RESULT([no]) 24*3f9d360cSMartin Matuska fi 25*3f9d360cSMartin Matuska 2616038816SMartin Matuska LIBS="$saved_libs" 2716038816SMartin Matuska AC_SUBST([LIBATOMIC_LIBS]) 2816038816SMartin Matuska]) 29