.diff

commit 4805e7a2680ead3e72ed60dad3a58da999008ecf
Author: VincentDondain <vincent.dondain@xamarin.com>
Date:   Tue Mar 29 13:54:00 2016 +0100

    [makefile] Show error message if we're missing buildinfo
    
    This can happen if you forget to run make install.

diff --git a/Makefile b/Makefile
index 685d44c..d162b9e 100644
--- a/Makefile
+++ b/Makefile
@@ -146,12 +146,14 @@ install-system: install-system-ios install-system-mac
 	$(Q) $(MAKE) install-symlinks MAC_DESTDIR=/ MAC_INSTALL_VERSION=Current IOS_DESTDIR=/ IOS_INSTALL_VERSION=Current -C msbuild V=$(V)
 
 install-system-ios:
+	@if ! test -s "$(IOS_DESTDIR)/$(MONOTOUCH_PREFIX)/buildinfo"; then echo "The Xamarin.iOS build seems incomplete. Did you run \"make install\"?"; exit 1; fi
 	$(Q) rm -f /Library/Frameworks/Xamarin.iOS.framework/Versions/Current
 	$(Q) mkdir -p /Library/Frameworks/Xamarin.iOS.framework/Versions
 	$(Q) ln -s $(IOS_DESTDIR)$(MONOTOUCH_PREFIX) /Library/Frameworks/Xamarin.iOS.framework/Versions/Current
 	$(Q) echo Installed Xamarin.iOS into /Library/Frameworks/Xamarin.iOS.framework/Versions/Current
 
 install-system-mac:
+	@if ! test -s "$(MAC_DESTDIR)/$(MAC_FRAMEWORK_CURRENT_DIR)/buildinfo" ; then echo "The Xamarin.Mac build seems incomplete. Did you run \"make install\"?"; exit 1; fi
 	$(Q) rm -f $(MAC_FRAMEWORK_DIR)/Versions/Current
 	$(Q) mkdir -p $(MAC_FRAMEWORK_DIR)/Versions
 	$(Q) ln -s $(MAC_DESTDIR)$(MAC_FRAMEWORK_CURRENT_DIR) $(MAC_FRAMEWORK_DIR)/Versions/Current