[Bug build/28128] New: declare_symbol_alias doesn't work for assembly codes

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=28128

            Bug ID: 28128
           Summary: declare_symbol_alias doesn't work for assembly codes
           Product: glibc
           Version: 2.34
            Status: NEW
          Severity: normal
          Priority: P2
         Component: build
          Assignee: unassigned at sourceware dot org
          Reporter: hjl.tools at gmail dot com
                CC: carlos at redhat dot com
  Target Milestone: ---

#define declare_symbol_alias(symbol, original, type, size) \
  declare_symbol_alias_1 (symbol, original, type, size)
#ifdef __ASSEMBLER__
# define declare_symbol_alias_1(symbol, original, type, size) \
   strong_alias (original, symbol); \
   .type C_SYMBOL_NAME (symbol), %##type; \
   .size C_SYMBOL_NAME (symbol), size

There are 2 problems:

1. .type and .size are substituted by arguments.
2. %##type generates "% type" since % isn't valid char for symbol.
But assembler doesn't support "% type":

[hjl@gnu-cfl-2 tmp]$ cat x.s
        .data
_r_gnu_debug:
        .zero 56

.globl _r_debug
.set _r_debug,_r_gnu_debug
.type _r_debug, % object
.size _r_debug, 40;
[hjl@gnu-cfl-2 tmp]$ gcc -c x.s
x.s: Assembler messages:
x.s:7: Error: unrecognized symbol type ""
x.s:7: Error: junk at end of line, first unrecognized character is `o'

[hjl@gnu-cfl-2 tmp]$ cat x.s 
        .data
_r_gnu_debug:
        .zero 56

.globl _r_debug
.set _r_debug,_r_gnu_debug
.type _r_debug, %object
.size _r_debug, 40;
[hjl@gnu-cfl-2 tmp]$ gcc -c x.s
[hjl@gnu-cfl-2 tmp]$

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