Description: fix circular dependency in makefile

 The upstream makefile is unhelpfully relying on make to allow it to break

 target dependency loops in a particular manner.  Instead, be explicit about

 the relationship between the targets.

Author: Steve Langasek <steve.langasek@ubuntu.com>

Last-Modified: 2018-03-21

Bug-Debian: https://bugs.debian.org/889176

Index: bc-1.07.1/bc/Makefile.am

===================================================================

--- bc-1.07.1.orig/bc/Makefile.am

+++ bc-1.07.1/bc/Makefile.am

@@ -8,7 +8,7 @@

              sbc.y

 noinst_HEADERS = libmath.h

-DISTCLEANFILES = sbc sbc.c sbc.h libmath.h

+DISTCLEANFILES = sbc sbc.c sbc.h libmath.h global_foo.c

 MAINTAINERCLEANFILES = Makefile.in bc.c bc.h scan.c \

 	bc.y bcdefs.h const.h execute.c fix-libmath_h \

@@ -28,16 +28,18 @@

 scan.o: bc.h

 global.o: libmath.h

+global_foo.c: global.c

+	cp -a global.c global_foo.c

 fbcOBJ = main.o bc.o scan.o execute.o load.o storage.o util.o warranty.o

 libmath.h: libmath.b $(fbcOBJ) $(LIBBC)

 	echo '{0}' > libmath.h

-	$(MAKE) global.o

-	$(LINK) -o fbc $(fbcOBJ) global.o $(LIBBC) $(LIBL) $(READLINELIB) $(LIBS)

+	$(MAKE) global_foo.o

+	$(LINK) -o fbc $(fbcOBJ) global_foo.o $(LIBBC) $(LIBL) $(READLINELIB) $(LIBS)

 	./fbc -c $(srcdir)/libmath.b </dev/null >libmath.h

 	$(srcdir)/fix-libmath_h

-	rm -f ./fbc ./global.o

+	rm -f ./fbc ./global_foo.o

 sbcOBJ = main.o sbc.o scan.o execute.o global.o load.o storage.o util.o \

          warranty.o