libnsm.a: retain CAP_NET_BIND when dropping privileges

[nfs-utils.git] / aclocal / libcap.m4

diff --git a/aclocal/libcap.m4 b/aclocal/libcap.m4
new file mode 100644 (file)
index 0000000..eabe507
--- /dev/null
+++ b/aclocal/libcap.m4
@@ -0,0 +1,15 @@
+dnl Checks for libcap.so
+dnl
+AC_DEFUN([AC_LIBCAP], [
+
+  dnl look for prctl
+  AC_CHECK_FUNC([prctl], , )
+
+  dnl look for the library; do not add to LIBS if found
+  AC_CHECK_LIB([cap], [cap_get_proc], [LIBCAP=-lcap], ,)
+  AC_SUBST(LIBCAP)
+
+  AC_CHECK_HEADERS([sys/capability.h], ,
+                   [AC_MSG_ERROR([libcap headers not found.])])
+
+])dnl