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A different set of hacks to make the crossref tests pass on powerpc64
and powerpc64le.
* testsuite/ld-scripts/crossref.exp: Remove -mcall-aixdesc hack.
* testsuite/ld-scripts/cross2.t: Tweak .opd and .toc placement.
* testsuite/ld-scripts/cross3.t: Likewise.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
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Fixes failures on hppa-linux and alpha-linux due to not merging
.data.* and .sdata into .data. cross3.t modified too since it is the
template for the NOCROSSREFS_TO scripts.
* testsuite/ld-scripts/cross3.t: Add commonly used data
and text section names to output section statements.
* testsuite/ld-scripts/cross4.t: Likewise.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
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NOCROSSREFS_TO is similar to the existing NOCROSSREFS command but only
checks one direction of cross referencing.
ld/ChangeLog
* ld.texinfo: Document NOCROSSREFS_TO script command.
* ldlang.h (struct lang_nocrossrefs): Add onlyfirst field.
(lang_add_nocrossref_to): New prototype.
* ldcref.c (check_local_sym_xref): Use onlyfirst to only look for
symbols defined in the first section.
(check_nocrossref): Likewise.
* ldgram.y (NOCROSSREFS_TO): New script command.
* ldlang.c (lang_add_nocrossref): Set onlyfirst to FALSE.
(lang_add_nocrossref_to): New function.
* ldlex.l (NOCROSSREFS_TO): New token.
* NEWS: Mention NOCROSSREFS_TO.
* testsuite/ld-scripts/cross4.t: New file.
* testsuite/ld-scripts/cross5.t: Likewise.
* testsuite/ld-scripts/cross6.t: Likewise.
* testsuite/ld-scripts/cross7.t: Likewise.
* testsuite/ld-scripts/crossref.exp: Run 4 new NOCROSSREFS_TO
tests.
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