Bug#842600: double-conversion FTCBFS: uses build architecture compiler

[Helmut Grohne]

Source: double-conversion
Version: 2.0.1-3
Tags: patch
User: helmutg at debian.org
Usertags: rebootstrap

double-conversion fails to cross build from source, because it uses the
build architecture compiler. The attached patch replaces the default of
CXX with a triplet-prefixed compiler such that both native and cross
builds just work. Please consider applying it.

Helmut
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diff --minimal -Nru double-conversion-2.0.1/debian/changelog double-conversion-2.0.1/debian/changelog
--- double-conversion-2.0.1/debian/changelog
+++ double-conversion-2.0.1/debian/changelog
@@ -1,3 +1,10 @@
+double-conversion (2.0.1-3.1) UNRELEASED; urgency=medium
+
+  * Non-maintainer upload.
+  * Fix FTCBFS: Use triplet-prefixed compiler. (Closes: #-1)
+
+ -- Helmut Grohne <helmut at subdivi.de>  Sun, 30 Oct 2016 18:19:44 +0200
+
 double-conversion (2.0.1-3) unstable; urgency=medium
 
   * libdouble-conversion1.symbols: replace "any-amd64" by
diff --minimal -Nru double-conversion-2.0.1/debian/rules double-conversion-2.0.1/debian/rules
--- double-conversion-2.0.1/debian/rules
+++ double-conversion-2.0.1/debian/rules
@@ -3,6 +3,10 @@
 # Get compilation flags from dpkg-buildflags
 include /usr/share/dpkg/default.mk
 
+ifeq ($(origin CXX),default)
+	CXX = $(DEB_HOST_GNU_TYPE)-g++
+endif
+
 ifneq (,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
 	NUMJOBS = $(patsubst parallel=%,%,$(filter parallel=%,$(DEB_BUILD_OPTIONS)))
 	MAKEFLAGS += -j$(NUMJOBS)