user-libatomic.m4

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    1 dnl #
    2 dnl # If -latomic exists and atomic.c doesn't link without it,
    3 dnl # it's needed for __atomic intrinsics.
    4 dnl #
    5 AC_DEFUN([ZFS_AC_CONFIG_USER_LIBATOMIC], [
    6         AC_MSG_CHECKING([whether -latomic is required])
    7 
    8         saved_libs="$LIBS"
    9         LIBS="$LIBS -latomic"
   10         LIBATOMIC_LIBS=""
   11 
   12         AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [
   13                 LIBS="$saved_libs"
   14                 saved_cflags="$CFLAGS"
   15                 CFLAGS="$CFLAGS -isystem lib/libspl/include"
   16                 AC_LINK_IFELSE([AC_LANG_PROGRAM([#include "lib/libspl/atomic.c"], [])], [], [LIBATOMIC_LIBS="-latomic"])
   17                 CFLAGS="$saved_cflags"
   18         ])
   19 
   20         if test -n "$LIBATOMIC_LIBS"; then
   21                 AC_MSG_RESULT([yes])
   22         else
   23                 AC_MSG_RESULT([no])
   24         fi
   25 
   26         LIBS="$saved_libs"
   27         AC_SUBST([LIBATOMIC_LIBS])
   28 ])

Cache object: 64ca47465c1be32b8a2f341ec463075f

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FreeBSD/Linux Kernel Cross Reference sys/contrib/openzfs/config/user-libatomic.m4

FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/config/user-libatomic.m4