From f823ef250462f40356e973c131d4f10b1323a43a Mon Sep 17 00:00:00 2001
From: Stefan `Sec` Zehl <sec@42.org>
Date: Tue, 24 Jan 2012 00:18:36 +0100
Subject: [PATCH] Add "fake memcpy" lib so broken gcc can compile this

---
 firmware/l0dable/Makefile      | 11 +++++++++--
 firmware/l0dable/help/memcpy.c | 10 ++++++++++
 firmware/l0dable/mktable.pl    |  7 +++++++
 3 files changed, 26 insertions(+), 2 deletions(-)
 create mode 100644 firmware/l0dable/help/memcpy.c

diff --git a/firmware/l0dable/Makefile b/firmware/l0dable/Makefile
index 873523b..ddf10f1 100644
--- a/firmware/l0dable/Makefile
+++ b/firmware/l0dable/Makefile
@@ -43,8 +43,8 @@ $(LDFILE):
 %.o : %.c
 	$(CC) $(CFLAGS) -o $@ $<
 
-%.elf: %.o $(FIRMWARE) $(LDFILE)
-	$(LD) $(LDFLAGS) -T $(LDFILE) -o $@ $<
+%.elf: %.o $(FIRMWARE) $(LDFILE) libmemcpy.a
+	$(LD) $(LDFLAGS) -T $(LDFILE) -o $@ $< -L. -lmemcpy
 	$(SIZE) $@
 
 %.bin: %.elf
@@ -85,6 +85,13 @@ $(OBJS): usetable.h
 usetable.h:
 	./mktable.pl
 
+help/memcpy.o: help/memcpy.c
+
+libmemcpy.a: help/memcpy.o
+	$(AR) rcs $@ $<
+	$(RANLIB) $(RANLIBFLAGS) $@
+
+
 .SUFFIXES:
 
 .PHONY: $(LDFILE)
diff --git a/firmware/l0dable/help/memcpy.c b/firmware/l0dable/help/memcpy.c
new file mode 100644
index 0000000..42e900d
--- /dev/null
+++ b/firmware/l0dable/help/memcpy.c
@@ -0,0 +1,10 @@
+#include <string.h>
+#include "../usetable.h"
+
+#undef memcpy
+
+void * memcpy(void *dst, const void *src, size_t len){
+	return
+		(*(void * (*)(void *, const void *, size_t ))(*(TheTable+_memcpy_nr)))
+		(dst, src, len);
+};
diff --git a/firmware/l0dable/mktable.pl b/firmware/l0dable/mktable.pl
index cceebe7..f55b9ee 100755
--- a/firmware/l0dable/mktable.pl
+++ b/firmware/l0dable/mktable.pl
@@ -5,6 +5,7 @@
 use strict;
 
 my $DIR="l0dable";
+my $memcpy;
 
 if( -d "../$DIR"){
     chdir("..");
@@ -105,10 +106,16 @@ for my $idx (0..$#symb){
         print C "$_,";
     };
     print I "#define $_ ($types{$_}(TheTable[$idx]))";
+	if($_ eq "memcpy" || $_ eq "memmove"){
+		$memcpy=$idx
+	};
 };
 
 print C "};";
 
+if (defined($memcpy)){
+	print I "#define _memcpy_nr $memcpy";
+};
 close(I);
 close(H);
 close(C);