[binutils-gdb/gdb-16-branch] bfd/doc: use abs_srcdir when creating symlinks

[Andrew Burgess]

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=2461ea21c7f6043e2669b6fd56f951792b3520ed

commit 2461ea21c7f6043e2669b6fd56f951792b3520ed
Author: Andrew Burgess <aburgess@redhat.com>
Date:   Tue Jan 21 13:06:18 2025 +0000

    bfd/doc: use abs_srcdir when creating symlinks
    
    After commit:
    
      commit bd32be01c997f686ab0b53f0640eaa0aeb61fbd3
      Date:   Fri Dec 3 00:23:20 2021 -0500
    
          bfd: merge doc subdir up a level
    
    And the follow-up commit:
    
      commit 98b1464bdf6306a8ab4614b5e9f76cdb2dd00b33
      Date:   Wed Oct 2 22:58:08 2024 +0300
    
          bfd: fix unnecessary bfd.info regen
    
    There is still a problem building the bfd docs from a release tar
    file.
    
    As the release tar file contains the pre-generated .texi files we
    expect the bfd/doc build stage to symlink to the pre-existing .texi
    files in the source tree.
    
    However, this is still not working as expected if $(srcdir) is
    relative.  The problem is this line in REGEN_TEXI:
    
        test -e $$texi || test ! -f $(srcdir)/$$texi || $(LN_S) $(srcdir)/$$texi $$texi; \
    
    This is executed from the build/bfd/ directory, so if $(srcdir) is
    relative, then this will get you from the bfd/ directory in the build
    tree to the corresponding bfd/ directory in the src tree.  However,
    the symlink is created in the bfd/doc/ build directory.  The relative
    path will then fail to take you to the bfd/ directory in the src
    tree.
    
    Fix this by using $(abs_srcdir) when creating the symlink.
    
    Approved-By: Nick Clifton <nickc@redhat.com>

Diff:
---
 bfd/Makefile.in  | 2 +-
 bfd/doc/local.mk | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/bfd/Makefile.in b/bfd/Makefile.in
index a781e2b8959..15931461694 100644
--- a/bfd/Makefile.in
+++ b/bfd/Makefile.in
@@ -1318,7 +1318,7 @@ REGEN_TEXI = \
 	$(MKDOC) -f $(srcdir)/doc/doc.str < $< > $@.tmp; \
 	texi=$@; \
 	texi=$${texi%.stamp}.texi; \
-	test -e $$texi || test ! -f $(srcdir)/$$texi || $(LN_S) $(srcdir)/$$texi $$texi; \
+	test -e $$texi || test ! -f $(srcdir)/$$texi || $(LN_S) $(abs_srcdir)/$$texi $$texi; \
 	$(SHELL) $(srcdir)/../move-if-change $@.tmp $$texi; \
 	touch $@; \
 	)
diff --git a/bfd/doc/local.mk b/bfd/doc/local.mk
index 346dba36b03..d8950d1b0d6 100644
--- a/bfd/doc/local.mk
+++ b/bfd/doc/local.mk
@@ -101,7 +101,7 @@ REGEN_TEXI = \
 	$(MKDOC) -f $(srcdir)/%D%/doc.str < $< > $@.tmp; \
 	texi=$@; \
 	texi=$${texi%.stamp}.texi; \
-	test -e $$texi || test ! -f $(srcdir)/$$texi || $(LN_S) $(srcdir)/$$texi $$texi; \
+	test -e $$texi || test ! -f $(srcdir)/$$texi || $(LN_S) $(abs_srcdir)/$$texi $$texi; \
 	$(SHELL) $(srcdir)/../move-if-change $@.tmp $$texi; \
 	touch $@; \
 	)