1 files changed, 78 insertions, 0 deletions
diff --git a/scripts/mk/buildtools.mk b/scripts/mk/buildtools.mk
new file mode 100644
index 0000000..dc28017
--- /dev/null
+++ b/scripts/mk/buildtools.mk
@@ -0,0 +1,78 @@
+# This Makefile fragment (since dpkg 1.19.0) defines the following variables
+# for host tools:
+#
+#   AS: assembler (since dpkg 1.19.1).
+#   CPP: C preprocessor.
+#   CC: C compiler.
+#   CXX: C++ compiler.
+#   OBJC: Objective C compiler.
+#   OBJCXX: Objective C++ compiler.
+#   GCJ: GNU Java compiler.
+#   F77: Fortran 77 compiler.
+#   FC: Fortran 9x compiler.
+#   LD: linker.
+#   STRIP: strip objects (since dpkg 1.19.1).
+#   OBJCOPY: copy objects (since dpkg 1.19.1).
+#   OBJDUMP: dump objects (since dpkg 1.19.1).
+#   NM: names lister (since dpkg 1.19.1).
+#   AR: archiver (since dpkg 1.19.1).
+#   RANLIB: archive index generator (since dpkg 1.19.1).
+#   PKG_CONFIG: pkg-config tool.
+#   QMAKE: Qt build system generator (since dpkg 1.20.0).
+#
+# All the above variables have a counterpart variable for the build tool,
+# as in CC → CC_FOR_BUILD.
+#
+# The variables are not exported by default. This can be changed by
+# defining DPKG_EXPORT_BUILDTOOLS.
+
+dpkg_datadir = $(srcdir)/mk
+include $(dpkg_datadir)/architecture.mk
+
+# We set the TOOL_FOR_BUILD variables to the specified value, and the TOOL
+# variables (for the host) to their triplet-prefixed form iff they are
+# not defined or contain the make built-in defaults. On native builds if
+# TOOL is defined and TOOL_FOR_BUILD is not, we fallback to use TOOL.
+define dpkg_buildtool_setvar
+  ifeq (,$(findstring $(3),$(DEB_BUILD_OPTIONS)))
+    ifeq ($(origin $(1)),default)
+      $(1) = $(DEB_HOST_GNU_TYPE)-$(2)
+    else
+      $(1) ?= $(DEB_HOST_GNU_TYPE)-$(2)
+    endif
+
+    # On native build fallback to use TOOL if that's defined.
+    ifeq ($(DEB_BUILD_GNU_TYPE),$(DEB_HOST_GNU_TYPE))
+      $(1)_FOR_BUILD ?= $$($(1))
+    else
+      $(1)_FOR_BUILD ?= $(DEB_BUILD_GNU_TYPE)-$(2)
+    endif
+  else
+    $(1) = :
+    $(1)_FOR_BUILD = :
+  endif
+
+  ifdef DPKG_EXPORT_BUILDTOOLS
+    export $(1)
+    export $(1)_FOR_BUILD
+  endif
+endef
+
+$(eval $(call dpkg_buildtool_setvar,AS,as))
+$(eval $(call dpkg_buildtool_setvar,CPP,gcc -E))
+$(eval $(call dpkg_buildtool_setvar,CC,gcc))
+$(eval $(call dpkg_buildtool_setvar,CXX,g++))
+$(eval $(call dpkg_buildtool_setvar,OBJC,gcc))
+$(eval $(call dpkg_buildtool_setvar,OBJCXX,g++))
+$(eval $(call dpkg_buildtool_setvar,GCJ,gcj))
+$(eval $(call dpkg_buildtool_setvar,F77,gfortran))
+$(eval $(call dpkg_buildtool_setvar,FC,gfortran))
+$(eval $(call dpkg_buildtool_setvar,LD,ld))
+$(eval $(call dpkg_buildtool_setvar,STRIP,strip,nostrip))
+$(eval $(call dpkg_buildtool_setvar,OBJCOPY,objcopy))
+$(eval $(call dpkg_buildtool_setvar,OBJDUMP,objdump))
+$(eval $(call dpkg_buildtool_setvar,NM,nm))
+$(eval $(call dpkg_buildtool_setvar,AR,ar))
+$(eval $(call dpkg_buildtool_setvar,RANLIB,ranlib))
+$(eval $(call dpkg_buildtool_setvar,PKG_CONFIG,pkg-config))
+$(eval $(call dpkg_buildtool_setvar,QMAKE,qmake))