avr.c (avr_option_override): Warn if asked to generate position independent code.

        * config/avr/avr.c (avr_option_override): Warn if asked to generate
        position independent code.
        * config/avr/avr.h: Modify LINK_SPEC to reject -shared.

From-SVN: r205633

gcc/ChangeLog

+2013-12-03  Senthil Kumar Selvaraj  <senthil_kumar.selvaraj@atmel.com>
+
+        * config/avr/avr.c (avr_option_override): Warn if asked to generate
+        position independent code.
+        * config/avr/avr.h: Modify LINK_SPEC to reject -shared.
+
 2013-12-03   H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR target/59363

gcc/config/avr/avr.c

@@ -314,6 +314,15 @@ avr_option_override (void)
       flag_omit_frame_pointer = 0;
     }
 
+  if (flag_pic == 1)
+    warning (OPT_fpic, "-fpic is not supported");
+  if (flag_pic == 2)
+    warning (OPT_fPIC, "-fPIC is not supported");
+  if (flag_pie == 1)
+    warning (OPT_fpie, "-fpie is not supported");
+  if (flag_pie == 2)
+    warning (OPT_fPIE, "-fPIE is not supported");
+
   avr_current_device = &avr_mcu_types[avr_mcu_index];
   avr_current_arch = &avr_arch_types[avr_current_device->arch];
 

gcc/config/avr/avr.h

@@ -522,7 +522,8 @@ extern const char *avr_device_to_sp8 (int argc, const char **argv);
                                mmcu=at90can64*|\
                                mmcu=at90usb64*:--pmem-wrap-around=64k}}}\
 %:device_to_ld(%{mmcu=*:%*})\
-%:device_to_data_start(%{mmcu=*:%*})"
+%:device_to_data_start(%{mmcu=*:%*})\
+%{shared:%eshared is not supported}"
 
 #define LIB_SPEC \
   "%{!mmcu=at90s1*:%{!mmcu=attiny11:%{!mmcu=attiny12:%{!mmcu=attiny15:%{!mmcu=attiny28: -lc }}}}}"