--- configure.ac.orig 2015-09-16 11:08:07.715932841 -0400 +++ configure.ac 2015-09-16 11:08:11.162932736 -0400 @@ -49,6 +49,7 @@ AC_PROG_YACC PKG_PROG_PKG_CONFIG +AC_GNU_SOURCE AC_CHECK_PROG([have_protoc_c], [protoc-c], [yes], [no]) AC_CHECK_HEADERS([google/protobuf-c/protobuf-c.h], [have_protobuf_c_h="yes"], --- ./src/daemon/Makefile.am.orig 2015-09-16 11:08:07.715932841 -0400 +++ ./src/daemon/Makefile.am 2015-09-16 11:08:07.715932841 -0400 @@ -49,7 +49,7 @@ collectd_CFLAGS = $(AM_CFLAGS) collectd_LDFLAGS = -export-dynamic collectd_LDADD = libavltree.la libcommon.la libheap.la -lm -collectd_DEPENDENCIES = +collectd_DEPENDENCIES = libavltree.la libcommon.la libheap.la # Link to these libraries.. if BUILD_WITH_LIBRT