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+## am/recurse.am: Makefile fragment to configure and build subdirs.
+##
+## Copyright (C) 2013 Peter Breitenlohner <tex-live@tug.org>
+## You may freely use, modify and/or distribute this file.
+##
+## requires $(recurse_this) and $(recurse_top).
+##
+# We must configure all subdirs since 'make dist' needs the Makefile.
+# For those not required for the current set of configure options
+# we append '--disable-build' so they can skip tests that would
+# fail because, e.g., some required libraries were not built.
+# Code inspired by automake's way to handle recursive targets.
+##
+CONFIG_AUX = $(recurse_top)subsubdir-conf.cmd
+
+all-local: recurse
+
+.PHONY: recurse
+recurse: $(CONFIG_AUX)
+ @fail= failcom='exit 1'; \
+ for f in x $$MAKEFLAGS; do \
+ case $$f in \
+ *=* | --[!k]*);; \
+ *k*) failcom='fail=yes';; \
+ esac; \
+ done; \
+ list='$(CONF_SUBDIRS)'; for one_dir in $$list; do \
+ if test ! -f $$one_dir/Makefile; then \
+ test -d $$one_dir || $(MKDIR_P) $$one_dir; \
+ cmd=`cat $(CONFIG_AUX) | sed "s,auxdir/auxsub,$(recurse_this)$$one_dir,g"`; \
+ case " $(MAKE_SUBDIRS) " in \
+ *" $$one_dir "*) skip=;; \
+ *) skip=' --disable-build';; \
+ esac; \
+ (cd $$one_dir && echo "=== configuring in $$one_dir (`pwd`)" && \
+ if $(AM_V_P); then echo "make: running $(SHELL) $$cmd$$skip"; fi && \
+ CONFIG_SHELL=$(SHELL) && export CONFIG_SHELL && \
+ eval $(SHELL) $$cmd$$skip $(cf_silent) || \
+ { echo "=== configuring in $$one_dir failed"; exit 1; }) && \
+ if test "x$$skip" = x; then \
+ echo "Making all in $$one_dir" && \
+ (cd $$one_dir && $(MAKE) $(AM_MAKEFLAGS) all); \
+ fi || eval $$failcom; \
+ fi; \
+ done; test -z "$$fail"
+
+$(CONFIG_AUX):
+ @echo "configure in $(recurse_top)auxdir/auxsub failed to create the file $@"
+ exit 1
+