RTEMS: Fix GCC specification

The use of -nostdlib and -nodefaultlibs disables the processing of
LIB_SPEC (%L) as specified by LINK_COMMAND_SPEC and thus disables the
default linker script for RTEMS.  Move the linker script to
STARTFILE_SPEC which is controlled by -nostdlib and -nostartfiles.  This
fits better since the linker script defines the platform start file
provided by the board support package in RTEMS.

gcc/

	* config/rtems.h (STARTFILE_SPEC): Remove nostdlib and
	nostartfiles handling since this is already done by
	LINK_COMMAND_SPEC.  Evaluate qnolinkcmds.
	(ENDFILE_SPEC): Remove nostdlib and nostartfiles handling since this
	is already done by LINK_COMMAND_SPEC.
	(LIB_SPECS): Remove nostdlib and nodefaultlibs handling since
	this is already done by LINK_COMMAND_SPEC.  Remove qnolinkcmds
	evaluation.

(cherry picked from commit 28229916e1b131ad5d17a73603f65229e0a92f58)

diff --git a/gcc/config/rtems.h b/gcc/config/rtems.h
index 30ad6258949d2aa49554adf5057358addc1ef2eb..7d1a23fb54d70d0c00b31cdd7c8427a8302a2f1b 100644 (file)
--- a/gcc/config/rtems.h
+++ b/gcc/config/rtems.h
@@ -36,11 +36,11 @@
  */
 #undef STARTFILE_SPEC
 #define STARTFILE_SPEC "%{!qrtems:crt0%O%s} " \
-"%{qrtems:%{!nostdlib:%{!nostartfiles:" RTEMS_STARTFILE_SPEC "}}}"
+"%{qrtems:" RTEMS_STARTFILE_SPEC " %{!qnolinkcmds:-T linkcmds%s}}"
 
 #undef ENDFILE_SPEC
 #define ENDFILE_SPEC \
-"%{qrtems:%{!nostdlib:%{!nostartfiles:" RTEMS_ENDFILE_SPEC "}}}"
+"%{qrtems:" RTEMS_ENDFILE_SPEC "}"
 
 /*
  * Some targets do not set up LIB_SPECS, override it, here.
@@ -49,9 +49,7 @@
 
 #undef LIB_SPEC
 #define LIB_SPEC "%{!qrtems:" STD_LIB_SPEC "} " \
-"%{qrtems:%{!nostdlib:%{!nodefaultlibs:" \
-"--start-group -lrtemsbsp -lrtemscpu -latomic -lc -lgcc --end-group} " \
-"%{!qnolinkcmds:-T linkcmds%s}}}"
+"%{qrtems:--start-group -lrtemsbsp -lrtemscpu -latomic -lc -lgcc --end-group}"
 
 #define TARGET_POSIX_IO