Remove warnings and add libm to libvarnishapi

lib/libvarnish/Makefile.am

@@ -13,8 +13,6 @@ libvarnish_a_CFLAGS = \
 	-DVARNISH_STATE_DIR='"${VARNISH_STATE_DIR}"' \
 	@SAN_CFLAGS@
 
-libvarnish_a_LDFLAGS = $(AM_LDFLAGS)
-
 libvarnish_a_SOURCES = \
 	binary_heap.c \
 	vas.c \

lib/libvarnishapi/Makefile.am

@@ -48,8 +48,8 @@ libvarnishapi_la_CFLAGS = \
 	-DVARNISH_STATE_DIR='"${VARNISH_STATE_DIR}"' \
 	@SAN_CFLAGS@
 
-libvarnishapi_la_LIBADD = @PCRE_LIBS@ @RT_LIBS@ \
-	@SAN_LDFLAGS@
+libvarnishapi_la_LIBADD = \
+	@SAN_LDFLAGS@ @PCRE_LIBS@ ${RT_LIBS} ${LIBM}
 
 if HAVE_LD_VERSION_SCRIPT
 libvarnishapi_la_LDFLAGS += -Wl,--version-script=$(srcdir)/libvarnishapi.map

lib/libvcc/Makefile.am

@@ -11,9 +11,6 @@ noinst_LIBRARIES = libvcc.a
 libvcc_a_CFLAGS = \
 	@SAN_CFLAGS@
 
-libvcc_a_LDFLAGS = $(AM_LDFLAGS) \
-	@SAN_LDFLAGS@
-
 libvcc_a_SOURCES = \
 	vcc_compile.h \
 	vcc_token_defs.h \

lib/libvgz/Makefile.am

@@ -7,9 +7,6 @@ noinst_LIBRARIES = libvgz.a
 libvgz_a_CFLAGS = -D_LARGEFILE64_SOURCE=1 -DZLIB_CONST \
 	$(libvgz_extra_cflags) @SAN_CFLAGS@
 
-libvgz_a_LDFLAGS = $(AM_LDFLAGS) \
-	@SAN_LDFLAGS@
-
 libvgz_a_SOURCES = \
 	adler32.c \
 	compress.c \