re PR target/65296 ([avr] fix various issues with specs file generation)

	PR target/65296
	* config/avr/gen-avr-mmcu-specs.c (*avrlibc_startfile): Adjust
	to new AVR-LibC file layout (bug #44574).
	(*avrlibc_devicelib): Same.
	* config/avr/avr-mcus.def: Adjust comments.
	* config/avr/avr.opt (nodevicelib): Adjust help.

From-SVN: r222179

gcc/ChangeLog

+2015-04-17  Sivanupandi Pitchumani <Pitchumani.Sivanupandi@atmel.com>
+
+	PR target/65296
+	* config/avr/gen-avr-mmcu-specs.c (*avrlibc_startfile): Adjust
+	to new AVR-LibC file layout (bug #44574).
+	(*avrlibc_devicelib): Same.
+	* config/avr/avr-mcus.def: Adjust comments.
+	* config/avr/avr.opt (nodevicelib): Adjust help.
+
 2015-04-17  Alan Lawrence  <alan.lawrence@arm.com>
 
 	* config/aarch64/arm_neon.h (vdup_n_f32): Remove forward declaration.

gcc/config/avr/avr-mcus.def

@@ -44,8 +44,8 @@
                      used by DRIVER_SELF_SPECS and gen-avr-mmcu-specs.c for
                      - the name of the device specific specs file
                        in -specs=device-specs/spec-<NAME>
-                     - the name of the startup file dev/<NAME>/crt1.o
-                     - the name of the device library dev/<NAME>/libdev.a
+                     - the name of the startup file crt<NAME>.o
+                     - to link the device library by means of -l<NAME>
 
        ARCH          Specifies the multilib variant together with AVR_SHORT_SP
 

gcc/config/avr/avr.opt

@@ -97,4 +97,4 @@ Allow to use truncation instead of rounding towards 0 for fractional int types
 
 nodevicelib
 Driver Target Report RejectNegative
-Do not link against the device-specific library libdev.a
+Do not link against the device-specific library lib<MCU>.a

gcc/config/avr/gen-avr-mmcu-specs.c

@@ -171,11 +171,11 @@ print_mcu (const avr_mcu_t *mcu)
   if (is_device)
     {
       fprintf (f, "*avrlibc_startfile:\n");
-      fprintf (f, "\tdev/%s/crt1.o%%s", mcu->name);
+      fprintf (f, "\tcrt%s.o%%s", mcu->name);
       fprintf (f, "\n\n");
 
       fprintf (f, "*avrlibc_devicelib:\n");
-      fprintf (f, "\t%%{!nodevicelib:dev/%s/libdev.a%%s}", mcu->name);
+      fprintf (f, "\t%%{!nodevicelib:-l%s}", mcu->name);
       fprintf (f, "\n\n");
     }
 #endif  // WITH_AVRLIBC