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| author | Patrick Steinhardt <ps@pks.im> | 2019-02-27 11:58:47 -0500 |
|---|---|---|
| committer | Steve Dickson <steved@redhat.com> | 2019-02-27 12:12:38 -0500 |
| commit | 4f91877bb313a35ade44d9dde1fd219035ba1fd9 (patch) | |
| tree | f863f3f91d44f71e1d213705bc119e1a8ab2fb58 | |
| parent | ed06fade6dc46df0a38caab2e465dfaabfc76f46 (diff) | |
| download | nfs-utils-4f91877bb313a35ade44d9dde1fd219035ba1fd9.tar.gz | |
configure.ac: more carefully detect availability of res_querydomain(3)
Since glibc 2.2, the function res_querydomain(3) is implemented as a
define to `__res_querydomain`. Due to this implementation detail, using
`AC_CHECK_LIB` with a symbol name of "res_querydomain" will cause a
linking failure and thus fail to detect its availability. This is why
right now, we try to detect availability of `__res_querydomain` instead.
Unfortunately, this may break on other platforms where there is no
`__res_querydomain` but only the function without leading underscores.
To fix this, we can perform another `AC_CHECK_LIB([resolv],
[res_querydomain], ...)` call in case where the other one was not found
and only raise an error if both symbols weren't found.
Signed-off-by: Patrick Steinhardt <ps@pks.im>
Signed-off-by: Steve Dickson <steved@redhat.com>
| -rw-r--r-- | configure.ac | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/configure.ac b/configure.ac index 4bf5aea..cb9d921 100644 --- a/configure.ac +++ b/configure.ac @@ -411,7 +411,8 @@ if test "$enable_gss" = yes; then fi dnl libdnsidmap specific checks -AC_CHECK_LIB([resolv], [__res_querydomain], , AC_MSG_ERROR(res_querydomain needed)) +AC_CHECK_LIB([resolv], [__res_querydomain], , + AC_CHECK_LIB([resolv], [res_querydomain], , AC_MSG_ERROR(res_querydomain needed))) AC_ARG_ENABLE([ldap], [AS_HELP_STRING([--disable-ldap],[Disable support for LDAP @<:default=detect@:>@])]) |