added MATHLIB for -as-needed linker flag (trac https://trac.osgeo.org/grass/ticket/69) (merge from devel_branch6)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@31423 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/gis/Makefile

@@ -1,7 +1,7 @@
 MODULE_TOPDIR = ../..
 
 LIB_NAME = $(GIS_LIBNAME)
-EXTRA_LIBS = $(XDRLIB) $(DATETIMELIB) $(INTLLIB)
+EXTRA_LIBS = $(XDRLIB) $(DATETIMELIB) $(INTLLIB) $(MATHLIB)
 DATASRC = ellipse.table datum.table datumtransform.table FIPS.code state27 state83 projections gui.tcl
 
 include $(MODULE_TOPDIR)/include/Make/Lib.make

lib/vector/diglib/Makefile

@@ -1,6 +1,6 @@
 MODULE_TOPDIR = ../../..
 
-EXTRA_LIBS=$(GISLIB) $(RTREELIB)
+EXTRA_LIBS=$(GISLIB) $(RTREELIB) $(MATHLIB)
 
 LIB_NAME = $(DIG2_LIBNAME)
 

lib/vector/rtree/Makefile

@@ -9,6 +9,8 @@ LIB_OBJS = card.o \
 	rect.o \
 	split_q.o 
 
+EXTRA_LIBS = $(MATHLIB)
+
 include $(MODULE_TOPDIR)/include/Make/Lib.make
 
 RTLINC = $(ARCH_INCDIR)/rtree