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Commit | Line | Data |
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fef8bd41 | 1 | dnl # |
d9f0f158 AZ |
2 | dnl # If -latomic exists and atomic.c doesn't link without it, |
3 | dnl # it's needed for __atomic intrinsics. | |
fef8bd41 AZ |
4 | dnl # |
5 | AC_DEFUN([ZFS_AC_CONFIG_USER_LIBATOMIC], [ | |
d9f0f158 | 6 | AC_MSG_CHECKING([whether -latomic is required]) |
fef8bd41 AZ |
7 | |
8 | saved_libs="$LIBS" | |
9 | LIBS="$LIBS -latomic" | |
d9f0f158 | 10 | LIBATOMIC_LIBS="" |
fef8bd41 AZ |
11 | |
12 | AC_LINK_IFELSE([AC_LANG_PROGRAM([], [])], [ | |
d9f0f158 AZ |
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 "$LIBATOMIC_LIBS"; then | |
fef8bd41 | 21 | AC_MSG_RESULT([yes]) |
d9f0f158 | 22 | else |
fef8bd41 | 23 | AC_MSG_RESULT([no]) |
d9f0f158 | 24 | fi |
fef8bd41 AZ |
25 | |
26 | LIBS="$saved_libs" | |
27 | AC_SUBST([LIBATOMIC_LIBS]) | |
28 | ]) |