Fix check for libcap to re-set LIBS; add -lrt for mq_unlink

diff --git a/configure.ac b/configure.ac
index 045bfb52a876a73c5e13e4fa6438359b151ab35f..0fdd7c58eb8f1f160986ec76a28103cc83cb5e78 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -232,18 +232,21 @@ AC_CHECK_HEADERS([linux/memfd.h], [], [])
 
 # unconditionally pull-in librt with old glibc versions
 AC_SEARCH_LIBS([clock_gettime], [rt], [], [])
+AC_SEARCH_LIBS([mq_unlink], [rt], [], [])
 
 AC_ARG_WITH([libcap],
             AS_HELP_STRING([--with-libcap=DIR], [Prefix for libcap]),
             [CAP_LDFLAGS="-L$with_libcap/lib"],
             [CAP_LDFLAGS=""])
 save_LIBS="$LIBS"
+save_LDFLAGS="$LDFLAGS"
 LIBS=
 LDFLAGS="$LDFLAGS $CAP_LDFLAGS"
 AC_SEARCH_LIBS([cap_init], [cap], [], [AC_MSG_ERROR([*** POSIX caps library not found])])
 CAP_LIBS="$LIBS"
 AC_SUBST(CAP_LIBS)
 AC_SUBST(CAP_LDFLAGS)
+LIBS="$save_LIBS"
 LDFLAGS="$save_LDFLAGS"
 
 AC_CHECK_FUNCS([memfd_create])