First check in

Makefile

@@ -0,0 +1,83 @@
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 2 as 
+# published by the Free Software Foundation here:
+# (http://www.gnu.org/licenses/gpl-2.0.html)
+# 
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+DEPENDS = ncurses,readline
+ARCH = x86_64
+URL = http://www.gnu.org/software/bc/
+DESC = bc is an arbitrary precision numeric processing language.
+SNAPVER = sr0
+
+ARCHIVE := $(PWD)/SRC/$(shell ls SRC|egrep '(bz2|gz|tar|xz)$$'|tail -1)
+TYPE := $(shell file -ib $(ARCHIVE)|cut -d';' -f1|tr -d '\n')
+SRCDIR := $(shell tar -tf $(ARCHIVE)|head -1|sed 's/\/.*//')
+PATCHDIR := $(PWD)/SRC/patches
+VERSION := $(shell echo $(SRCDIR)|egrep -o '\-[0-9].*'|sed 's/^-//')$(SNAPVER)
+
+MAKE = make
+MAKEINST = make install
+SNAPHACKS =
+
+include /usr/share/snap/Makefile.snaplinux
+
+$(SRCDIR): $(ARCHIVE)
+	@if [ '$(TYPE)' == 'application/x-bzip2' ]; then \
+		tar -jxf $(ARCHIVE); \
+	elif [ '$(TYPE)' == 'application/x-gzip' ]; then \
+		tar -zxf $(ARCHIVE); \
+	elif [ '$(TYPE)' == 'application/x-tar' ]; then \
+		tar -xf $(ARCHIVE); \
+	elif [ '$(TYPE)' == 'application/x-xz' ]; then \
+		tar -xf $(ARCHIVE); \
+	else \
+		echo 'Unable to determine archive type'; \
+		exit 1; \
+	fi
+
+$(SRCDIR)/config.log: $(SRCDIR)
+	@cd $(SRCDIR) && for patch in $(PATCHDIR)/*.patch; do \
+		patch --verbose -Np1 -i $$patch; \
+	done
+	@cd $(SRCDIR); \
+	./configure \
+		--prefix=/usr \
+		--mandir=/usr/share/man \
+		--infodir=/usr/share/info \
+		--with-readline \
+		--build=x86_64-snap-linux-gnu \
+		--host=x86_64-snap-linux-gnu \
+		--target=x86_64-snap-linux-gnu
+
+$(SRCDIR)/bc/bc: $(SRCDIR)/config.log
+	@cd $(SRCDIR); \
+	$(MAKE)
+
+$(ROOT): $(SRCDIR)/bc/bc
+	@if [ -d $(ROOT) ]; then \
+		touch $(ROOT); \
+	else \
+		mkdir -v $(ROOT); \
+	fi
+
+	@cd $(SRCDIR); \
+	$(MAKEINST) DESTDIR=$(ROOT)
+
+	@$(SNAPHACKS)
+
+test: $(ROOT)
+	@cd $(SRCDIR); \
+	echo "quit" | ./bc/bc -l Test/checklib.b
+
+clean:
+	@rm -rvf $(ROOT) \
+		$(SNAPINFO) \
+		$(MANIFEST) \
+		$(FILES) \
+		$(SRCDIR)
+

SNAP/README

@@ -0,0 +1,3 @@
+This is the directory where the manifest, snapinfo, and files.tar.gz
+files will be created. It is also where the usher file should be
+placed if it is required by the package.

SRC/patches/01_fix-segfault-jumping-to-label.patch

@@ -0,0 +1,16 @@
+diff -purN a/bc/execute.c b/bc/execute.c
+--- a/bc/execute.c	2006-09-04 21:39:31.000000000 -0500
++++ b/bc/execute.c	2016-09-09 12:57:14.756000000 -0500
+@@ -133,7 +133,11 @@ execute ()
+ 	  gp = functions[pc.pc_func].f_label;
+ 	  l_gp  = label_num >> BC_LABEL_LOG;
+ 	  l_off = label_num % BC_LABEL_GROUP;
+-	  while (l_gp-- > 0) gp = gp->l_next;
++	  while (gp && l_gp-- > 0) gp = gp->l_next;
++	  if (!gp) {
++	    rt_error ("No label group for label %d.", label_num);
++	    break;
++	  }
+ 	  pc.pc_addr = gp->l_adrs[l_off];
+ 	}
+ 	break;

SRC/patches/02_fix-memory-leak.patch

@@ -0,0 +1,24 @@
+diff -purN a/bc/bc.y b/bc/bc.y
+--- a/bc/bc.y	2006-09-04 21:39:31.000000000 -0500
++++ b/bc/bc.y	2016-09-09 13:02:41.476000000 -0500
+@@ -569,6 +569,7 @@ expression		:  named_expression ASSIGN_O
+ 				    generate (">");
+ 				  break;
+ 				}
++			        free($2);	
+ 			    }
+ 			| expression '+' expression
+ 			    {
+diff -purN a/bc/util.c b/bc/util.c
+--- a/bc/util.c	2006-09-04 21:39:31.000000000 -0500
++++ b/bc/util.c	2016-09-09 13:02:41.476000000 -0500
+@@ -602,8 +602,7 @@ lookup (name, namekind)
+     case FUNCTDEF:
+       if (id->f_name != 0)
+ 	{
+-	  if (namekind != FUNCT)
+-	    free(name);
++	  free(name);
+ 	  /* Check to see if we are redefining a math lib function. */ 
+ 	  if (use_math && namekind == FUNCTDEF && id->f_name <= 6)
+ 	    id->f_name = next_func++;

SRC/patches/03_fix-uninitialized-variable.patch

@@ -0,0 +1,11 @@
+diff -purN a/bc/storage.c b/bc/storage.c
+--- a/bc/storage.c	2006-09-04 21:39:31.000000000 -0500
++++ b/bc/storage.c	2016-09-09 13:05:09.720000000 -0500
+@@ -99,6 +99,7 @@ more_functions (VOID)
+     {
+       f = &functions[indx];
+       f->f_defined = FALSE;
++      f->f_void = FALSE;
+       f->f_body = (char *) bc_malloc (BC_START_SIZE);
+       f->f_body_size = BC_START_SIZE;
+       f->f_code_size = 0;

SRC/patches/README

@@ -0,0 +1,2 @@
+Place any patch files here and preface each with a number indicating
+the order of execution. Patch files are expected to use a .patch extension.