diff --git a/Makefile b/Makefile
index 0be89ea..27041c7 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 SRCS = $(wildcard src/*.c)
 PROGS = $(patsubst src/%.c,%,$(SRCS))
 
-CFLAGS += -g -Wall -O0
+CFLAGS += -g -Wall -O0 -ansi -static
 VPATH = src/
 
 all: $(PROGS)
diff --git a/bin/1_n_a_factorial b/bin/1_n_a_factorial
index eb1874f..9fe91bb 100755
Binary files a/bin/1_n_a_factorial and b/bin/1_n_a_factorial differ
diff --git a/bin/1_n_b_ascii b/bin/1_n_b_ascii
index 59d2b26..7bd455f 100755
Binary files a/bin/1_n_b_ascii and b/bin/1_n_b_ascii differ
diff --git a/bin/1_p_a_kanten b/bin/1_p_a_kanten
index 6e8e3de..fb62352 100755
Binary files a/bin/1_p_a_kanten and b/bin/1_p_a_kanten differ
diff --git a/bin/1_v_a_square b/bin/1_v_a_square
index 6a89bf6..f97d3ca 100755
Binary files a/bin/1_v_a_square and b/bin/1_v_a_square differ
diff --git a/bin/2_p_b_raten b/bin/2_p_b_raten
index 6c1a73b..a7a223a 100755
Binary files a/bin/2_p_b_raten and b/bin/2_p_b_raten differ
diff --git a/bin/2_p_c_tree b/bin/2_p_c_tree
index 8848ea9..8f8d156 100755
Binary files a/bin/2_p_c_tree and b/bin/2_p_c_tree differ
diff --git a/bin/2_p_d_einXeins b/bin/2_p_d_einXeins
index ff7b12b..3d3cb0a 100755
Binary files a/bin/2_p_d_einXeins and b/bin/2_p_d_einXeins differ
diff --git a/bin/2_v_b_logic b/bin/2_v_b_logic
index a63434b..d5ef36d 100755
Binary files a/bin/2_v_b_logic and b/bin/2_v_b_logic differ
diff --git a/bin/README b/bin/README
new file mode 100644
index 0000000..4e55e36
--- /dev/null
+++ b/bin/README
@@ -0,0 +1,9 @@
+This directory contains builds of the following type:
+
+- ELF 64-bit LSB executable
+- x86-64
+- statically linked
+- for GNU/Linux 2.6.15
+- not stripped
+- not optimized
+- debugging enabled (use GDB)