* ldlang.c (entry_symbol_default): New file-scope global.
(lang_finish): Use it, not a hardwired "start".
(lang_default_entry): Set it.
* ldlang.h: Declare lang_default_entry.
* emultempl/beos.em, emultempl/pe.em: Use lang_default_entry,
not lang_add_entry, to override default entry point symbol.
ld/testsuite:
* ld-scripts/align.exp: Mark align1 XFAIL on PECOFF targets.
* ld-scripts/data.exp: Mark data UNSUPPORTED on a.out targets.
* ld-scripts/provide.exp, ld-scripts/size.exp: Mark all tests
UNSUPPORTED on a.out targets. Tidy.
* ld-scripts/assert.s: Remove comment.
* ld-scripts/data.s: Likewise.
* ld-scripts/data.t: Set start address to allow for aout headers.
Make first LONG pc-relative.
* ld-scripts/data.d: Update.
* ld-scripts/defined2.d: Allow other random syms.
* ld-scripts/defined3.d: Likewise.
* ld-scripts/provide-1.s: Pad section.
* ld-scripts/provide-1.t: Set .data address and align.
* ld-scripts/provide-1.d: Update.
* ld-scripts/provide-2.s: Pad section.
* ld-scripts/provide-2.d: Allow random trailing syms.
* ld-scripts/provide-3.s: Pad section.
* ld-scripts/provide-3.d: Fix typos.
* ld-scripts/provide.exp: Don't run on aix.
* ld-scripts/size-1.s: Simplify test.
* ld-scripts/size-1.t: Rewrite.
* ld-scripts/size-1.d: Update.
* ld-scripts/size-2.s: Simplify.
* ld-scripts/size-2.t: Set start address. Set exe flag on image.
* ld-scripts/size-2.d: Update.
* ld-scripts/size.exp: Don't run on aix. Run size-2 on all elf
targets except mips.