[glibc] ia64: Always define IA64_USE_NEW_STUB as a flag macro

[glibc] ia64: Always define IA64_USE_NEW_STUB as a flag macro

[Florian Weimer]

https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=18bd9c3d3b1b6a9182698c85354578d1d58e9d64

commit 18bd9c3d3b1b6a9182698c85354578d1d58e9d64
Author: Florian Weimer <fweimer@redhat.com>
Date:   Mon May 9 18:15:16 2022 +0200

    ia64: Always define IA64_USE_NEW_STUB as a flag macro
    
    And keep the previous definition if it exists.  This allows
    disabling IA64_USE_NEW_STUB while keeping USE_DL_SYSINFO defined.
    
    Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

Diff:
---
 sysdeps/unix/sysv/linux/ia64/brk.c    |  5 ++---
 sysdeps/unix/sysv/linux/ia64/sysdep.h | 23 +++++++++++++----------
 2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/sysdeps/unix/sysv/linux/ia64/brk.c b/sysdeps/unix/sysv/linux/ia64/brk.c
index 65142aeae9..d2135b74fc 100644
--- a/sysdeps/unix/sysv/linux/ia64/brk.c
+++ b/sysdeps/unix/sysv/linux/ia64/brk.c
@@ -16,7 +16,6 @@
    License along with the GNU C Library; if not, see
    <https://www.gnu.org/licenses/>.  */
 
-#include <dl-sysdep.h>
-/* brk is used by statup before TCB is properly set.  */
-#undef USE_DL_SYSINFO
+/* brk is used by startup before TCB is properly set up.  */
+#define IA64_USE_NEW_STUB 0
 #include <sysdeps/unix/sysv/linux/brk.c>
diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h
index 193ecee023..14adbdf4ff 100644
--- a/sysdeps/unix/sysv/linux/ia64/sysdep.h
+++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h
@@ -44,12 +44,15 @@
 #undef SYS_ify
 #define SYS_ify(syscall_name)	__NR_##syscall_name
 
-#if defined USE_DL_SYSINFO \
-	&& (IS_IN (libc) \
-	    || IS_IN (libpthread) || IS_IN (librt))
-# define IA64_USE_NEW_STUB
-#else
-# undef IA64_USE_NEW_STUB
+#ifndef IA64_USE_NEW_STUB
+# if defined USE_DL_SYSINFO && IS_IN (libc)
+#  define IA64_USE_NEW_STUB 1
+# else
+#  define IA64_USE_NEW_STUB 0
+# endif
+#endif
+#if IA64_USE_NEW_STUB && !USE_DL_SYSINFO
+# error IA64_USE_NEW_STUB needs USE_DL_SYSINFO
 #endif
 
 #ifdef __ASSEMBLER__
@@ -101,7 +104,7 @@
 	mov r15=num;				\
 	break __IA64_BREAK_SYSCALL
 
-#ifdef IA64_USE_NEW_STUB
+#if IA64_USE_NEW_STUB
 # ifdef SHARED
 #  define DO_CALL(num)				\
 	.prologue;				\
@@ -185,7 +188,7 @@
    (non-negative) errno on error or the return value on success.
  */
 
-#ifdef IA64_USE_NEW_STUB
+#if IA64_USE_NEW_STUB
 
 # define INTERNAL_SYSCALL_NCS(name, nr, args...)			      \
 ({									      \
@@ -277,7 +280,7 @@
 #define ASM_OUTARGS_5	ASM_OUTARGS_4, "=r" (_out4)
 #define ASM_OUTARGS_6	ASM_OUTARGS_5, "=r" (_out5)
 
-#ifdef IA64_USE_NEW_STUB
+#if IA64_USE_NEW_STUB
 #define ASM_ARGS_0
 #define ASM_ARGS_1	ASM_ARGS_0, "4" (_out0)
 #define ASM_ARGS_2	ASM_ARGS_1, "5" (_out1)
@@ -313,7 +316,7 @@
   /* Branch registers.  */						\
   "b6"
 
-#ifdef IA64_USE_NEW_STUB
+#if IA64_USE_NEW_STUB
 # define ASM_CLOBBERS_6	ASM_CLOBBERS_6_COMMON
 #else
 # define ASM_CLOBBERS_6	ASM_CLOBBERS_6_COMMON , "b7"