diff --git a/Programming/cctools/build b/Programming/cctools/build
new file mode 100755
index 0000000..b280e4b
--- /dev/null
+++ b/Programming/cctools/build
@@ -0,0 +1,26 @@
+#!/usr/bin/env modbuild
+#
+# :FIXME: this is work in progress!
+#
+pbuild::add_to_group 'Programming'
+pbuild::set_download_url "https://opensource.apple.com/tarballs/cctools/$P-$V.tar.gz"
+pbuild::compile_in_sourcetree
+
+pbuild::set_default_patch_strip 0
+pbuild::add_patch 'files/PR-12400897.patch'
+pbuild::add_patch 'files/PR-37520.patch'
+pbuild::add_patch 'files/cctools-829-lto.patch'
+pbuild::add_patch 'files/cctools-839-static-dis_info.patch'
+pbuild::add_patch 'files/cctools-862-prunetrie.patch'
+pbuild::add_patch 'files/cctools-895-OFILE_LLVM_BITCODE.patch'
+pbuild::add_patch 'files/cctools-895-big_endian.patch'
+pbuild::add_patch 'files/not-clang.patch'
+
+#pbuild::set_docfiles 'COPYING' 'COPYING.LIB' 'COPYING.RUNTIME' 'COPYING3' 'COPYING3.LIB' 'NEWS' 'README'
+
+pbuild::configure() {
+	:
+}
+
+pbuild::make_all
+
diff --git a/Programming/cctools/files/PR-12400897.patch b/Programming/cctools/files/PR-12400897.patch
new file mode 100644
index 0000000..8a2ac50
--- /dev/null
+++ b/Programming/cctools/files/PR-12400897.patch
@@ -0,0 +1,35 @@
+--- misc/nm.c	1969-12-31 16:00:00.000000000 -0800
++++ misc/nm.c	2012-09-29 12:36:22.000000000 -0700
+@@ -496,7 +496,7 @@ void *cookie)
+     uint32_t nsymbols;
+     struct value_diff *value_diffs;
+ 
+-    char *short_name, *has_suffix;
++    char *short_name, *suffix;
+     enum bool is_framework;
+ 
+ 	cmd_flags = (struct cmd_flags *)cookie;
+@@ -650,9 +650,20 @@ void *cookie)
+ 		    process_flags.lib_names[j] =
+ 			(char *)dl + dl->dylib.name.offset;
+ 		    short_name = guess_short_name(process_flags.lib_names[j],
+-						  &is_framework, &has_suffix);
+-		    if(short_name != NULL)
+-			process_flags.lib_names[j] = short_name;
++						  &is_framework, &suffix);
++		    if(short_name != NULL) {
++			if (suffix) {
++			    char *combined_name;
++			    asprintf(&combined_name, "%s%s", short_name, suffix);
++			    if (combined_name) {
++				process_flags.lib_names[j] = combined_name;
++				free(short_name);
++				free(suffix);
++			    }
++			} else {
++			    process_flags.lib_names[j] = short_name;
++			}
++		    }
+ 		    j++;
+ 		}
+ 		lc = (struct load_command *)
diff --git a/Programming/cctools/files/PR-37520.patch b/Programming/cctools/files/PR-37520.patch
new file mode 100644
index 0000000..fcac838
--- /dev/null
+++ b/Programming/cctools/files/PR-37520.patch
@@ -0,0 +1,55 @@
+--- as/ppc.c.orig	2013-01-04 10:39:49.000000000 +0100
++++ as/ppc.c	2013-01-04 10:40:02.000000000 +0100
+@@ -1019,6 +1019,8 @@ char *op)
+ 
+ 	/* if this instruction requires labels mark it for later */
+ 	switch(insn.reloc){
++	case NO_RELOC:
++	    break;
+ 	case PPC_RELOC_HI16:
+ 	case PPC_RELOC_LO16:
+ 	case PPC_RELOC_HA16:
+@@ -1033,6 +1035,7 @@ char *op)
+ 		    insn.reloc);
+ 	    break;
+ 	case PPC_RELOC_BR14:
++	case PPC_RELOC_BR14_predicted:
+ 	    fix_new(frag_now,
+ 		    thisfrag - frag_now->fr_literal,
+ 		    4,
+--- as/m88k.c.orig	1969-12-31 16:00:00.000000000 -0800
++++ as/m88k.c	2013-07-05 10:32:19.000000000 -0700
+@@ -600,6 +600,10 @@ char *op)
+ 
+ 	/* if this instruction requires labels mark it for later */
+ 	switch (insn.reloc) {
++
++		case NO_RELOC:
++				break;
++
+ 		case M88K_RELOC_LO16:
+ 		case M88K_RELOC_HI16:
+ 				fix_new(
+--- as/sparc.c.orig	1969-12-31 16:00:00.000000000 -0800
++++ as/sparc.c	2013-07-05 10:32:14.000000000 -0700
+@@ -851,6 +851,20 @@ sparc_ip (str)
+  		  /* plug absolutes directly into opcode */
+ 
+ 		  switch(the_insn.reloc) {
++		  case SPARC_RELOC_13:
++		    if (the_insn.exp.X_seg == SEG_BIG)
++		      opcode |= (*(int *) generic_bignum) & 0x1fff;
++		    else
++		      opcode |= the_insn.exp.X_add_number & 0x1fff;
++		    the_insn.reloc = SPARC_RELOC_NONE;
++		    break;
++		  case SPARC_RELOC_22:
++		    if (the_insn.exp.X_seg == SEG_BIG)
++		      opcode |= (*(int *) generic_bignum) & 0x3fffff;
++		    else
++		      opcode |= the_insn.exp.X_add_number & 0x3fffff;
++		    the_insn.reloc = SPARC_RELOC_NONE;
++		    break;
+ 		  case SPARC_RELOC_HI22:
+ 		    /* extract upper 22 bits from constant */
+ 		    opcode |= (the_insn.exp.X_add_number >> 10) & 0x3fffff;
diff --git a/Programming/cctools/files/cctools-829-lto.patch b/Programming/cctools/files/cctools-829-lto.patch
new file mode 100644
index 0000000..79c811a
--- /dev/null
+++ b/Programming/cctools/files/cctools-829-lto.patch
@@ -0,0 +1,39 @@
+--- libstuff/lto.c.orig	1969-12-31 16:00:00.000000000 -0800
++++ libstuff/lto.c	2012-09-04 14:59:31.000000000 -0700
+@@ -112,13 +112,21 @@ void **pmod) /* maybe NULL */
+ 	    lto_path = makestr(prefix, "../lib/libLTO.dylib", NULL);
+ 
+ 	    lto_handle = dlopen(lto_path, RTLD_NOW);
++	    free(lto_path);
++	    lto_path = NULL;
+ 	    if(lto_handle == NULL){
+-		free(lto_path);
+-		lto_path = NULL;
+-		lto_handle = dlopen("/Applications/Xcode.app/Contents/"
+-				    "Developer/Toolchains/XcodeDefault."
+-				    "xctoolchain/usr/lib/libLTO.dylib",
+-				    RTLD_NOW);
++		const char *lto_paths[] = {
++		    "@@LLVM_LIBDIR@@/libLTO.dylib",
++		    "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib",
++		    "/usr/lib/libLTO.dylib",
++		    "/Applications/Xcode.app/usr/lib/libLTO.dylib",
++		    "/Developer/usr/lib/libLTO.dylib",
++		    NULL
++                };
++                const char **p;
++		for(p = lto_paths; *p && !lto_handle ; p++) {
++		    lto_handle = dlopen(*p, RTLD_NOW);
++		}
+ 	    }
+ 	    if(lto_handle == NULL)
+ 		return(0);
+@@ -142,8 +150,6 @@ void **pmod) /* maybe NULL */
+ 	       lto_get_sym_attr == NULL ||
+ 	       lto_get_sym_name == NULL){
+ 		dlclose(lto_handle);
+-		if(lto_path != NULL)
+-		    free(lto_path);
+ 		return(0);
+ 	    }
+ 	}
diff --git a/Programming/cctools/files/cctools-839-static-dis_info.patch b/Programming/cctools/files/cctools-839-static-dis_info.patch
new file mode 100644
index 0000000..3a490ce
--- /dev/null
+++ b/Programming/cctools/files/cctools-839-static-dis_info.patch
@@ -0,0 +1,22 @@
+--- otool/arm_disasm.c.orig	2013-08-29 14:23:24.000000000 -0700
++++ otool/arm_disasm.c	2013-08-29 14:23:51.000000000 -0700
+@@ -62,7 +62,7 @@ typedef char bfd_byte;
+ 
+ /* HACKS to avoid pulling in all of FSF binutils include/dis-asm.h */
+ typedef int (*fprintf_ftype) (void *, const char*, ...);
+-struct disassemble_info { /* HACK'ed up for just what we need here */
++static struct disassemble_info { /* HACK'ed up for just what we need here */
+   fprintf_ftype fprintf_func;
+   void *stream;
+ 
+--- otool/i386_disasm.c.orig	2013-08-29 14:23:19.000000000 -0700
++++ otool/i386_disasm.c	2013-08-29 14:24:00.000000000 -0700
+@@ -1600,7 +1600,7 @@ static unsigned int xmm_rm(int r_m, int 
+ /*
+  * This is passed to the llvm disassembler.
+  */
+-struct disassemble_info {
++static struct disassemble_info {
+   enum bool verbose;
+   /* Relocation information.  */
+   struct relocation_info *sorted_relocs;
diff --git a/Programming/cctools/files/cctools-862-prunetrie.patch b/Programming/cctools/files/cctools-862-prunetrie.patch
new file mode 100644
index 0000000..ebe7d9a
--- /dev/null
+++ b/Programming/cctools/files/cctools-862-prunetrie.patch
@@ -0,0 +1,34 @@
+--- misc/Makefile.orig	2015-01-10 20:43:30.000000000 -0800
++++ misc/Makefile	2015-01-10 20:51:27.000000000 -0800
+@@ -201,14 +201,18 @@ indr.NEW: indr.o
+ 		$(OFILE_DIR)/indr.private.o
+ 	$(DSYMUTIL) $(SYMROOT)/indr.NEW
+ 
+-strip.NEW: strip.o
++strip.NEW: strip.o PruneTrie.o
+ 	$(CC) $(RC_CFLAGS) -nostdlib -r \
+ 		-o $(OBJROOT)/strip.private.o \
+ 		$(OFILE_DIR)/strip.o $(LIBSTUFF)
+ 	$(CXX) $(RC_CFLAGS) $(SDK) -o $(SYMROOT)/strip.NEW \
+-		$(OFILE_DIR)/strip.private.o $(LIB_PRUNETRIE) $(CXXLIB)
++		$(OFILE_DIR)/strip.private.o $(OFILE_DIR)/PruneTrie.o $(CXXLIB)
+ 	$(DSYMUTIL) $(SYMROOT)/strip.NEW
+ 
++PruneTrie.o: PruneTrie.cpp
++	$(CXX) $(CXXFLAGS) $(RC_CFLAGS) $(SDK) $(CXXLIB) -c -o \
++		$(OBJROOT)/PruneTrie.o $(SRCROOT)/PruneTrie.cpp
++
+ nmedit.NEW: nmedit.o
+ 	$(CC) $(RC_CFLAGS) -nostdlib -r \
+ 		-o $(OBJROOT)/nmedit.private.o \
+--- misc/strip.c.orig	2015-01-10 21:25:17.000000000 -0800
++++ misc/strip.c	2015-01-10 21:25:40.000000000 -0800
+@@ -47,7 +47,7 @@
+ #include "stuff/unix_standard_mode.h"
+ #include "stuff/execute.h"
+ #ifdef TRIE_SUPPORT
+-#include <mach-o/prune_trie.h>
++#include "prune_trie.h"
+ #endif /* TRIE_SUPPORT */
+ 
+ /* These are set from the command line arguments */
diff --git a/Programming/cctools/files/cctools-895-OFILE_LLVM_BITCODE.patch b/Programming/cctools/files/cctools-895-OFILE_LLVM_BITCODE.patch
new file mode 100644
index 0000000..c137e4c
--- /dev/null
+++ b/Programming/cctools/files/cctools-895-OFILE_LLVM_BITCODE.patch
@@ -0,0 +1,18 @@
+--- misc/strings.c-orig	2016-12-09 19:03:02.000000000 +0100
++++ misc/strings.c	2016-12-23 10:35:34.000000000 +0100
+@@ -335,8 +335,13 @@
+ 	 * If the ofile is not an object file then process it without reguard
+ 	 * to sections.
+ 	 */
+-	if(ofile->object_addr == NULL || ofile->member_type == OFILE_LLVM_BITCODE){
+-	    if(ofile->file_type == OFILE_FAT && ofile->arch_flag.cputype != 0){
++	if(ofile->object_addr == NULL
++#ifdef LTO_SUPPORT
++	   || ofile->member_type == OFILE_LLVM_BITCODE){
++#else
++	  ){
++#endif /* LTO_SUPPORT */
++	  if(ofile->file_type == OFILE_FAT && ofile->arch_flag.cputype != 0){
+ 		if(ofile->fat_header->magic == FAT_MAGIC_64){
+ 		    addr = ofile->file_addr +
+ 			   ofile->fat_archs64[ofile->narch].offset;
diff --git a/Programming/cctools/files/cctools-895-big_endian.patch b/Programming/cctools/files/cctools-895-big_endian.patch
new file mode 100644
index 0000000..92aa091
--- /dev/null
+++ b/Programming/cctools/files/cctools-895-big_endian.patch
@@ -0,0 +1,12 @@
+--- libstuff/ofile.c-	2016-12-16 11:53:10.000000000 -0500
++++ libstuff/ofile.c	2016-12-16 11:53:41.000000000 -0500
+@@ -3423,7 +3423,7 @@
+ 	    if(size - offset > sizeof(uint32_t)){
+ 		memcpy(&magic, addr + offset, sizeof(uint32_t));
+ #ifdef __BIG_ENDIAN__
+-		if(magic == FAT_MAGIC || (magic == FAT_MAGIC_64)
++		if(magic == FAT_MAGIC || magic == FAT_MAGIC_64)
+ #endif /* __BIG_ENDIAN__ */
+ #ifdef __LITTLE_ENDIAN__
+ 		if(magic == SWAP_INT(FAT_MAGIC) ||
+
diff --git a/Programming/cctools/files/not-clang.patch b/Programming/cctools/files/not-clang.patch
new file mode 100644
index 0000000..6db44a2
--- /dev/null
+++ b/Programming/cctools/files/not-clang.patch
@@ -0,0 +1,12 @@
+--- as/driver.c.orig	2015-11-23 21:01:45.000000000 -0800
++++ as/driver.c	2015-11-23 21:09:24.000000000 -0800
+@@ -280,6 +280,9 @@ char **envp)
+ 	   arch_flag.cputype == CPU_TYPE_ARM)
+ 	    run_clang = 1;
+ 
++        /* MACPORTS: Don't use the clang assembler for now. */
++        run_clang = 0;
++
+ 	/*
+ 	 * Use the clang as the assembler if is the default or asked to with
+ 	 * the -q flag. But don't use it asked to use the system assembler
diff --git a/Programming/cctools/files/snowleopard-strnlen.patch b/Programming/cctools/files/snowleopard-strnlen.patch
new file mode 100644
index 0000000..80e3b82
--- /dev/null
+++ b/Programming/cctools/files/snowleopard-strnlen.patch
@@ -0,0 +1,21 @@
+--- otool/ofile_print.c.orig	2013-11-10 22:33:14.000000000 -0800
++++ otool/ofile_print.c	2013-11-10 22:34:19.000000000 -0800
+@@ -225,6 +225,18 @@
+ #include "stuff/guess_short_name.h"
+ #include "ofile_print.h"
+ 
++static size_t
++strnlen(const char *s, size_t maxlen)
++{
++	size_t len;
++
++	for (len = 0; len < maxlen; len++, s++) {
++		if (!*s)
++			break;
++	}
++	return (len);
++}
++
+ /* <mach/loader.h> */
+ /* The maximum section alignment allowed to be specified, as a power of two */
+ #define MAXSECTALIGN		15 /* 2**15 or 0x8000 */
diff --git a/Programming/cctools/files/variants b/Programming/cctools/files/variants
new file mode 100644
index 0000000..1bfef38
--- /dev/null
+++ b/Programming/cctools/files/variants
@@ -0,0 +1 @@
+ctools/895	unstable