binutils: Fix relocation of ld.so.conf in nativesdk builds

We need binutils to look at our ld.so.conf file within the SDK to ensure
we search the SDK's libdirs as well as those from the host system.

There add a patch which passes in the directory to the code using a define,
then add it to a section we relocate in a similar way to the way we relocate
the gcc internal paths. This ensures that ld works correctly in our buildtools
tarball.

Standard sysroot relocation doesn't work since we're not in a sysroot,
we want to use both the host system and SDK libs.

(From OE-Core rev: f6c1089642934ad93056ef19a0888965486ee030)

(From OE-Core rev: 09a2b16ac2bd1e3e415131e46315c851373aa7e0)

(From OE-Core rev: d0b7811b0e8654cf83d1b0f8256c7941fc3d9c41)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

2 files changed, 82 insertions, 0 deletions

diff --git a/meta/recipes-devtools/binutils/binutils/nativesdk-relocation.patch b/meta/recipes-devtools/binutils/binutils/nativesdk-relocation.patch
new file mode 100644
index 0000000000..408f7d18b7
--- /dev/null
+++ b/meta/recipes-devtools/binutils/binutils/nativesdk-relocation.patch
@@ -0,0 +1,80 @@
+We need binutils to look at our ld.so.conf file within the SDK to ensure 
+we search the SDK's libdirs as well as those from the host system.
+
+We therefore pass in the directory to the code using a define, then add
+it to a section we relocate in a similar way to the way we relocate the
+gcc internal paths. This ensures that ld works correctly in our buildtools
+tarball.
+
+Standard sysroot relocation doesn't work since we're not in a sysroot, 
+we want to use both the host system and SDK libs.
+
+Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
+2020/1/17
+Upstream-Status: Inappropriate [OE specific tweak]
+
+Index: git/ld/Makefile.am
+===================================================================
+--- git.orig/ld/Makefile.am
++++ git/ld/Makefile.am
+@@ -36,7 +36,8 @@ am__skipyacc =
+ 
+ ELF_CLFAGS=-DELF_LIST_OPTIONS=@elf_list_options@ \
+           -DELF_SHLIB_LIST_OPTIONS=@elf_shlib_list_options@ \
+-          -DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@
++          -DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@ \
++           -DSYSCONFDIR="\"$(sysconfdir)\""
+ WARN_CFLAGS = @WARN_CFLAGS@
+ NO_WERROR = @NO_WERROR@
+ AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS)
+Index: git/ld/Makefile.in
+===================================================================
+--- git.orig/ld/Makefile.in
++++ git/ld/Makefile.in
+@@ -546,7 +546,8 @@ am__skiplex =
+ am__skipyacc = 
+ ELF_CLFAGS = -DELF_LIST_OPTIONS=@elf_list_options@ \
+           -DELF_SHLIB_LIST_OPTIONS=@elf_shlib_list_options@ \
+-          -DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@
++          -DELF_PLT_UNWIND_LIST_OPTIONS=@elf_plt_unwind_list_options@ \
++           -DSYSCONFDIR="\"$(sysconfdir)\""
+ 
+ AM_CFLAGS = $(WARN_CFLAGS) $(ELF_CLFAGS)
+ @ENABLE_PLUGINS_FALSE@PLUGIN_C = 
+Index: git/ld/emultempl/elf32.em
+===================================================================
+--- git.orig/ld/emultempl/elf32.em
++++ git/ld/emultempl/elf32.em
+@@ -1024,7 +1024,7 @@ gld${EMULATION_NAME}_check_ld_so_conf (c
+ 
+       info.path = NULL;
+       info.len = info.alloc = 0;
+-      tmppath = concat (ld_sysroot, "${prefix}/etc/ld.so.conf",
++      tmppath = concat (ld_sysconfdir, "/ld.so.conf",
+                        (const char *) NULL);
+       if (!gld${EMULATION_NAME}_parse_ld_so_conf (&info, tmppath))
+        {
+Index: git/ld/ldmain.c
+===================================================================
+--- git.orig/ld/ldmain.c
++++ git/ld/ldmain.c
+@@ -68,6 +68,7 @@ char *program_name;
+ 
+ /* The prefix for system library directories.  */
+ const char *ld_sysroot;
++char ld_sysconfdir[4096] __attribute__ ((section (".gccrelocprefix"))) = SYSCONFDIR;
+ 
+ /* The canonical representation of ld_sysroot.  */
+ char *ld_canon_sysroot;
+Index: git/ld/ldmain.h
+===================================================================
+--- git.orig/ld/ldmain.h
++++ git/ld/ldmain.h
+@@ -23,6 +23,7 @@
+ 
+ extern char *program_name;
+ extern const char *ld_sysroot;
++extern char ld_sysconfdir[4096];
+ extern char *ld_canon_sysroot;
+ extern int ld_canon_sysroot_len;
+ extern FILE *saved_script_handle;
diff --git a/meta/recipes-devtools/binutils/binutils_2.32.bb b/meta/recipes-devtools/binutils/binutils_2.32.bb
index 51a9748906..3dcc837c78 100644
--- a/meta/recipes-devtools/binutils/binutils_2.32.bb
+++ b/meta/recipes-devtools/binutils/binutils_2.32.bb
@@ -46,4 +46,6 @@ do_install_class-native () {
 PACKAGE_BEFORE_PN += "libbfd"
 FILES_libbfd = "${libdir}/libbfd-*.so"
 
+SRC_URI_append_class-nativesdk =  "file://nativesdk-relocation.patch"
+
 BBCLASSEXTEND = "native nativesdk"