Allow target to override gnu-user.h crti and crtn

Allow target to override gnu-user.h crti and crtn

[Alan Modra]

Also give target access to the gnu-user.h LINK_GCC_C_SEQUENCE_SPEC.
In preparation for using gnu-user.h in rs6000/.

Bootstrapped etc. powerpc64le-linux.  OK?

	* config/gnu-user.h (GNU_USER_TARGET_CRTI): Define.
	(GNU_USER_TARGET_STARTFILE_SPEC): Use it here.
	(GNU_USER_TARGET_CRTN): Define.
	(GNU_USER_TARGET_ENDFILE_SPEC): Use it here.
	(GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC): Define.

diff --git a/gcc/config/gnu-user.h b/gcc/config/gnu-user.h
index 75f6a6f0a7d..09170d416b8 100644
--- a/gcc/config/gnu-user.h
+++ b/gcc/config/gnu-user.h
@@ -40,6 +40,9 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define CRTOFFLOADEND ""
 #endif
 
+#define GNU_USER_TARGET_CRTI "crti.o%s"
+#define GNU_USER_TARGET_CRTN "crtn.o%s"
+
 /* Provide a STARTFILE_SPEC appropriate for GNU userspace.  Here we add
    the GNU userspace magical crtbegin.o file (see crtstuff.c) which
    provides part of the support for getting C++ file-scope static
@@ -51,8 +54,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      static:crt1.o%s; \
      static-pie:rcrt1.o%s; \
      " PIE_SPEC ":Scrt1.o%s; \
-     :crt1.o%s} \
-   crti.o%s \
+     :crt1.o%s} " \
+   GNU_USER_TARGET_CRTI " \
    %{static:crtbeginT.o%s; \
      shared|static-pie|" PIE_SPEC ":crtbeginS.o%s; \
      :crtbegin.o%s} \
@@ -75,8 +78,8 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
      fvtable-verify=std:vtv_end.o%s} \
    %{static:crtend.o%s; \
      shared|static-pie|" PIE_SPEC ":crtendS.o%s; \
-     :crtend.o%s} \
-   crtn.o%s " \
+     :crtend.o%s} " \
+   GNU_USER_TARGET_CRTN " " \
    CRTOFFLOADEND
 #undef  ENDFILE_SPEC
 #define ENDFILE_SPEC GNU_USER_TARGET_ENDFILE_SPEC
@@ -106,11 +109,13 @@ see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
 #define LINK_EH_SPEC "%{!static|static-pie:--eh-frame-hdr} "
 #endif
 
-#undef LINK_GCC_C_SEQUENCE_SPEC
-#define LINK_GCC_C_SEQUENCE_SPEC \
+#define GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC \
   "%{static|static-pie:--start-group} %G %{!nolibc:%L} \
    %{static|static-pie:--end-group}%{!static:%{!static-pie:%G}}"
 
+#undef LINK_GCC_C_SEQUENCE_SPEC
+#define LINK_GCC_C_SEQUENCE_SPEC GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC
+
 /* Use --as-needed -lgcc_s for eh support.  */
 #ifdef HAVE_LD_AS_NEEDED
 #define USE_LD_AS_NEEDED 1

-- 
Alan Modra
Australia Development Lab, IBM

Re: Allow target to override gnu-user.h crti and crtn

[Jeff Law]

On 11/12/18 4:31 AM, Alan Modra wrote:
> Also give target access to the gnu-user.h LINK_GCC_C_SEQUENCE_SPEC.
> In preparation for using gnu-user.h in rs6000/.
> 
> Bootstrapped etc. powerpc64le-linux.  OK?
> 
> 	* config/gnu-user.h (GNU_USER_TARGET_CRTI): Define.
> 	(GNU_USER_TARGET_STARTFILE_SPEC): Use it here.
> 	(GNU_USER_TARGET_CRTN): Define.
> 	(GNU_USER_TARGET_ENDFILE_SPEC): Use it here.
> 	(GNU_USER_TARGET_LINK_GCC_C_SEQUENCE_SPEC): Define.
OK
jeff