[PATCH] bash: fix mkbuiltins build failure

[Christopher Larson <kergoth@gmail.com>]

From: Christopher Larson <chris_larson@mentor.com>

On hosts with FORTIFY_SOURCES, stringize support is required, as it's used by
the macros to wrap functions (e.g. read and open in unistd.h). Those wrappers
use the STRING() macro from unistd.h. A header in the bash sources overrides
the unistd.h macro to 'x' when HAVE_STRINGIZE is not defined, causing the
wrappers to generate calls to 'xread' and 'xopen', which do not exist,
resulting in a failure to link.

Assume we have stringize support when cross-compiling, which works around the
issue.

It may be best for upstream to either give up on supporting compilers without
stringize support, or to not define STRING() at all when FORTIFY_SOURCES is
defined, letting the unistd.h one be used, instead.

Signed-off-by: Christopher Larson <chris_larson@mentor.com>
---
 .../bash/bash-4.2/mkbuiltins_have_stringize.patch  | 26 ++++++++++++++++++++++
 meta/recipes-extended/bash/bash_4.2.bb             |  3 ++-
 2 files changed, 28 insertions(+), 1 deletion(-)
 create mode 100644 meta/recipes-extended/bash/bash-4.2/mkbuiltins_have_stringize.patch

diff --git a/meta/recipes-extended/bash/bash-4.2/mkbuiltins_have_stringize.patch b/meta/recipes-extended/bash/bash-4.2/mkbuiltins_have_stringize.patch
new file mode 100644
index 0000000..a9391d6
--- /dev/null
+++ b/meta/recipes-extended/bash/bash-4.2/mkbuiltins_have_stringize.patch
@@ -0,0 +1,26 @@
+On hosts with FORTIFY_SOURCES, stringize support is required, as it's used by
+the macros to wrap functions (e.g. read and open in unistd.h). Those wrappers
+use the STRING() macro from unistd.h. A header in the bash sources overrides
+the unistd.h macro to 'x' when HAVE_STRINGIZE is not defined, causing the
+wrappers to generate calls to 'xread' and 'xopen', which do not exist,
+resulting in a failure to link.
+
+Assume we have stringize support when cross-compiling, which works around the
+issue.
+
+It may be best for upstream to either give up on supporting compilers without
+stringize support, or to not define STRING() at all when FORTIFY_SOURCES is
+defined, letting the unistd.h one be used, instead.
+
+Upstream-Status: Pending
+
+--- bash-4.2.orig/builtins/mkbuiltins.c
++++ bash-4.2/builtins/mkbuiltins.c
+@@ -28,6 +28,7 @@
+ #  define HAVE_STDLIB_H
+
+ #  define HAVE_RENAME
++#  define HAVE_STRINGIZE
+ #endif /* CROSS_COMPILING */
+
+ #if defined (HAVE_UNISTD_H)
diff --git a/meta/recipes-extended/bash/bash_4.2.bb b/meta/recipes-extended/bash/bash_4.2.bb
index 5a0f015..07dda09 100644
--- a/meta/recipes-extended/bash/bash_4.2.bb
+++ b/meta/recipes-extended/bash/bash_4.2.bb
@@ -4,7 +4,7 @@ require bash.inc
 LICENSE = "GPLv3+"
 LIC_FILES_CHKSUM = "file://COPYING;md5=d32239bcb673463ab874e80d47fae504"
 
-PR = "r5"
+PR = "r6"
 
 SRC_URI = "${GNU_MIRROR}/bash/${BPN}-${PV}.tar.gz;name=tarball \
            ${GNU_MIRROR}/bash/bash-4.2-patches/bash42-001;apply=yes;striplevel=0;name=patch001 \
@@ -18,6 +18,7 @@ SRC_URI = "${GNU_MIRROR}/bash/${BPN}-${PV}.tar.gz;name=tarball \
            ${GNU_MIRROR}/bash/bash-4.2-patches/bash42-009;apply=yes;striplevel=0;name=patch009 \
            ${GNU_MIRROR}/bash/bash-4.2-patches/bash42-010;apply=yes;striplevel=0;name=patch010 \
            file://execute_cmd.patch;striplevel=0 \
+           file://mkbuiltins_have_stringize.patch \
            "
 
 SRC_URI[tarball.md5sum] = "3fb927c7c33022f1c327f14a81c0d4b0"
-- 
1.7.12.4