Added -fPIC -D_REENTRANT for gnu compiler builds.

config/CONFIG_COMMON

@@ -76,6 +76,7 @@ EPICS_BASE_BIN          = $(EPICS_BASE)/bin/$(T_A)
 GCC_ANSI = $(GCC) -ansi
 GCC_STRICT = $(GCC) -ansi -pedantic
 GCC_TRAD = $(GCC) -traditional
+GCC_DEP_CFLAGS = -fPIC -D_REENTRANT
 GCC_WARN_YES = -Wall
 GCC_WARN_NO = -w
 GCC_OPT_YES = -O
@@ -84,13 +85,14 @@ GCC_SFLAGS_YES = -static
 GCC_SFLAGS_NO =
 GCC_SLIBS_YES =
 GCC_SLIBS_NO =
-GCC_SHRLIB_CFLAGS_YES =  -fPIC
+GCC_SHRLIB_CFLAGS_YES =
 GCC_SHRLIB_LDFLAGS_YES =  -shared
 
 G++_NORMAL = $(G++) -ansi -pedantic
 G++_STRICT = $(G++) -ansi -pedantic -Wtraditional
 G++_TRAD = $(G++) -traditional
 G++_TEMPL_INST_FLAG = -DEXPL_TEMPL
+G++_DEP_CFLAGS = -fPIC -D_REENTRANT
 G++_WARN_YES = -Wall \
       -Wmissing-prototypes -Woverloaded-virtual \
       -Wwrite-strings -Wconversion -Wstrict-prototypes\
@@ -103,7 +105,7 @@ G++_SFLAGS_NO =
 G++_SLIBS_YES =
 G++_SLIBS_NO =
 G++_DEPENDS_FLAG = -MM
-G++_SHRLIB_CFLAGS_YES =  -fPIC
+G++_SHRLIB_CFLAGS_YES =
 G++_SHRLIB_LDFLAGS_YES =  -shared
 
 #--------------------------------------------------