Binutils: ARC: Fix build failures if makeinfo is missing

Build failed when "makeinfo" was missing on the build host.
This was happening because "makeinfo" is required to build .info targets
and make exited with error. The issue hadn't appeared before as there was
prebuilt documentation in ARC binutils tarballs, so no attempts had been
made to build docs.

Missing "makeinfo" only stops us from building docs
("missing" script already throws a warning on that regard).
Let's continue to build other targets.

Now exit code of the script called "missing" is checked.
The value 127 means that "makeinfo" is not available on the build host.

So when such value occurs, 0 is returned to the top level makefile.
Documentation is not being built but further build of binutils continues.

Fixes http://autobuild.buildroot.net/results/55c/55cd09a559016f4f252f0e4c27313b9806135cf4//

Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/binutils/arc-2016.03/0800-Docs-Prevent-build-failures-when-makeinfo-is-missing.patch

@@ -0,0 +1,159 @@
+From 5bd39e24e4903e49a0c301de4013c6b720862da1 Mon Sep 17 00:00:00 2001
+From: Zakharov Vlad <vzakhar@synopsys.com>
+Date: Fri, 3 Jun 2016 21:33:43 +0300
+Subject: [PATCH] Docs: Prevent build failures when "makeinfo" is missing
+
+Build failed when "makeinfo" was missing on the build host.
+This was happenning because "makeinfo" is required to build .info targets
+and make exited with error. But missing "makeinfo" only stops us from
+building docs ("missing" script already throws a warning on that regard).
+Let's continue to build other targets.
+
+Now exit code of the script called "missing" is checked.
+The value 127 means that "makeinfo" is not available on the build host.
+
+So when such value occurs 0 is returned to the top level makefile.
+Documentation is not being built but further build of binutils continues.
+
+Signed-off-by: Zakharov Vlad <vzakhar@synopsys.com>
+---
+ bfd/doc/Makefile.in      | 8 +++++++-
+ binutils/doc/Makefile.in | 8 +++++++-
+ gas/doc/Makefile.in      | 8 +++++++-
+ gprof/Makefile.in        | 8 +++++++-
+ ld/Makefile.in           | 8 +++++++-
+ 5 files changed, 35 insertions(+), 5 deletions(-)
+
+diff --git a/bfd/doc/Makefile.in b/bfd/doc/Makefile.in
+index be737f6..6c1eaf7 100644
+--- a/bfd/doc/Makefile.in
++++ b/bfd/doc/Makefile.in
+@@ -468,6 +468,8 @@ mostlyclean-libtool:
+ clean-libtool:
+ 	-rm -rf .libs _libs
+ 
++# Exit code 127 means that "makeinfo" is missing. So let's skip .info target
++# but return 0 to top level Makefile to build all other targets.
+ bfd.info: bfd.texinfo $(bfd_TEXINFOS)
+ 	restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+ 	rm -rf $$backupdir && mkdir $$backupdir && \
+@@ -481,7 +483,11 @@ bfd.info: bfd.texinfo $(bfd_TEXINFOS)
+ 	then \
+ 	  rc=0; \
+ 	else \
+-	  rc=$$?; \
++	  if test $$? -eq 127; then \
++		rc=0; \
++	  else \
++	  	rc=$$?; \
++	  fi; \
+ 	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+ 	fi; \
+ 	rm -rf $$backupdir; exit $$rc
+diff --git a/binutils/doc/Makefile.in b/binutils/doc/Makefile.in
+index ea3f938..8ed7884 100644
+--- a/binutils/doc/Makefile.in
++++ b/binutils/doc/Makefile.in
+@@ -397,6 +397,8 @@ mostlyclean-libtool:
+ clean-libtool:
+ 	-rm -rf .libs _libs
+ 
++# Exit code 127 means that "makeinfo" is missing. So let's skip .info target
++# but return 0 to top level Makefile to build all other targets.
+ binutils.info: binutils.texi 
+ 	restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+ 	rm -rf $$backupdir && mkdir $$backupdir && \
+@@ -410,7 +412,11 @@ binutils.info: binutils.texi
+ 	then \
+ 	  rc=0; \
+ 	else \
+-	  rc=$$?; \
++	  if test $$? -eq 127; then \
++		rc=0; \
++	  else \
++		rc=$$?; \
++	  fi; \
+ 	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+ 	fi; \
+ 	rm -rf $$backupdir; exit $$rc
+diff --git a/gas/doc/Makefile.in b/gas/doc/Makefile.in
+index 9ca5e8e..3159bc3 100644
+--- a/gas/doc/Makefile.in
++++ b/gas/doc/Makefile.in
+@@ -425,6 +425,8 @@ mostlyclean-libtool:
+ clean-libtool:
+ 	-rm -rf .libs _libs
+ 
++# Exit code 127 means that "makeinfo" is missing. So let's skip .info target
++# but return 0 to top level Makefile to build all other targets.
+ as.info: as.texinfo $(as_TEXINFOS)
+ 	restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+ 	rm -rf $$backupdir && mkdir $$backupdir && \
+@@ -438,7 +440,11 @@ as.info: as.texinfo $(as_TEXINFOS)
+ 	then \
+ 	  rc=0; \
+ 	else \
+-	  rc=$$?; \
++	  if test $$? -eq 127; then \
++		rc=0; \
++	  else \
++	    rc=$$?; \
++	  fi; \
+ 	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+ 	fi; \
+ 	rm -rf $$backupdir; exit $$rc
+diff --git a/gprof/Makefile.in b/gprof/Makefile.in
+index 67e85cd..c4040eb 100644
+--- a/gprof/Makefile.in
++++ b/gprof/Makefile.in
+@@ -538,6 +538,8 @@ clean-libtool:
+ distclean-libtool:
+ 	-rm -f libtool config.lt
+ 
++# Exit code 127 means that "makeinfo" is missing. So let's skip .info target
++# but return 0 to top level Makefile to build all other targets.
+ gprof.info: gprof.texi $(gprof_TEXINFOS)
+ 	restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+ 	rm -rf $$backupdir && mkdir $$backupdir && \
+@@ -551,7 +553,11 @@ gprof.info: gprof.texi $(gprof_TEXINFOS)
+ 	then \
+ 	  rc=0; \
+ 	else \
+-	  rc=$$?; \
++	  if test $$? -eq 127; then \
++		rc=0; \
++	  else \
++		rc=$$?; \
++	  fi; \
+ 	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+ 	fi; \
+ 	rm -rf $$backupdir; exit $$rc
+diff --git a/ld/Makefile.in b/ld/Makefile.in
+index 7c78198..08950a8 100644
+--- a/ld/Makefile.in
++++ b/ld/Makefile.in
+@@ -1591,6 +1591,8 @@ clean-libtool:
+ distclean-libtool:
+ 	-rm -f libtool config.lt
+ 
++# Exit code 127 means that "makeinfo" is missing. So let's skip .info target
++# but return 0 to top level Makefile to build all other targets.
+ ld.info: ld.texinfo $(ld_TEXINFOS)
+ 	restore=: && backupdir="$(am__leading_dot)am$$$$" && \
+ 	rm -rf $$backupdir && mkdir $$backupdir && \
+@@ -1604,7 +1606,11 @@ ld.info: ld.texinfo $(ld_TEXINFOS)
+ 	then \
+ 	  rc=0; \
+ 	else \
+-	  rc=$$?; \
++	  if test $$? -eq 127; then \
++		rc=0; \
++	  else \
++		rc=$$?; \
++	  fi; \
+ 	  $$restore $$backupdir/* `echo "./$@" | sed 's|[^/]*$$||'`; \
+ 	fi; \
+ 	rm -rf $$backupdir; exit $$rc
+-- 
+2.5.5
+