gnulib: Drop no-abort.patch

Originally added in commit db7337a3d (grub-core/lib/posix_wrap/stdlib.h
(abort): Removed), this patched out all relevant invocations of abort()
in gnulib. While it was not documented why at the time, testing suggests
that there's no abort() implementation available for gnulib to use.

gnulib's position is that the use of abort() is correct here, since it
happens when input violates a "shall" from POSIX. Additionally, the
code in question is probably not reachable. Since abort() is more
friendly to user-space, they prefer to make no change, so we can just
carry a define instead (suggested by Paul Eggert).

Signed-off-by: Robbie Harwood <rharwood@redhat.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>

4 files changed, 11 insertions, 28 deletions

diff --git a/bootstrap.conf b/bootstrap.conf
index 21a8cf15d..71acbeeb1 100644
--- a/bootstrap.conf
+++ b/bootstrap.conf
@@ -82,7 +82,7 @@ cp -a INSTALL INSTALL.grub
 bootstrap_post_import_hook () {
   set -e
   for patchname in fix-null-deref fix-null-state-deref fix-regcomp-uninit-token \
-      fix-regexec-null-deref fix-uninit-structure fix-unused-value fix-width no-abort; do
+      fix-regexec-null-deref fix-uninit-structure fix-unused-value fix-width; do
     patch -d grub-core/lib/gnulib -p2 \
       < "grub-core/lib/gnulib-patches/$patchname.patch"
   done
diff --git a/conf/Makefile.extra-dist b/conf/Makefile.extra-dist
index 15a9b74e9..4ddc3c8f7 100644
--- a/conf/Makefile.extra-dist
+++ b/conf/Makefile.extra-dist
@@ -35,7 +35,6 @@ EXTRA_DIST += grub-core/lib/gnulib-patches/fix-regexec-null-deref.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-uninit-structure.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-unused-value.patch
 EXTRA_DIST += grub-core/lib/gnulib-patches/fix-width.patch
-EXTRA_DIST += grub-core/lib/gnulib-patches/no-abort.patch
 
 EXTRA_DIST += grub-core/lib/libgcrypt
 EXTRA_DIST += grub-core/lib/libgcrypt-grub/mpi/generic
diff --git a/config.h.in b/config.h.in
index 8808d7272..6418cf9ff 100644
--- a/config.h.in
+++ b/config.h.in
@@ -70,6 +70,16 @@
 
 #  ifndef _GL_INLINE_HEADER_BEGIN
 #    define _GL_ATTRIBUTE_CONST __attribute__ ((const))
+
+/*
+ * We don't have an abort() for gnulib to call in regexp.  Because gnulib is
+ * built as a separate object that is then linked with, it doesn't have any
+ * of our headers or functions around to use - so we unfortunately can't
+ * print anything.  Builds of emu include the system's stdlib, which includes
+ * a prototype for abort(), so leave this as a macro that doesn't take
+ * arguments.
+ */
+#    define abort __builtin_trap
 #  endif /* !_GL_INLINE_HEADER_BEGIN */
 
 #endif
diff --git a/grub-core/lib/gnulib-patches/no-abort.patch b/grub-core/lib/gnulib-patches/no-abort.patch
deleted file mode 100644
index e469c4762..000000000
--- a/grub-core/lib/gnulib-patches/no-abort.patch
+++ /dev/null
@@ -1,26 +0,0 @@
-diff --git a/lib/regcomp.c b/lib/regcomp.c
-index cc85f35ac..de45ebb5c 100644
---- a/lib/regcomp.c
-+++ b/lib/regcomp.c
-@@ -528,9 +528,9 @@ regerror (int errcode, const regex_t *__restrict preg, char *__restrict errbuf,
-        to this routine.  If we are given anything else, or if other regex
-        code generates an invalid error code, then the program has a bug.
-        Dump core so we can fix it.  */
--    abort ();
--
--  msg = gettext (__re_error_msgid + __re_error_msgid_idx[errcode]);
-+    msg = gettext ("unknown regexp error");
-+  else
-+    msg = gettext (__re_error_msgid + __re_error_msgid_idx[errcode]);
- 
-   msg_size = strlen (msg) + 1; /* Includes the null.  */
- 
-@@ -1136,7 +1136,7 @@ optimize_utf8 (re_dfa_t *dfa)
- 	}
- 	break;
-       default:
--	abort ();
-+	break;
-       }
- 
-   if (mb_chars || has_period)