diff --git a/examples/core/makefile b/examples/core/makefile
index aa782d9..48b1706 100644
--- a/examples/core/makefile
+++ b/examples/core/makefile
@@ -23,6 +23,7 @@ DEPS=$(SQUIGGLE) $(MATH)
 
 ## Flags
 DEBUG= #'-g'
+WARN=-Wall -Wextra -Wno-unused-parameter
 STANDARD=-std=c99
 WARNINGS=-Wall
 OPTIMIZED=-O3  #-Ofast
@@ -33,12 +34,12 @@ FORMATTER=clang-format -i -style=$(STYLE_BLUEPRINT)
 
 ## make all
 all:
-	$(CC) $(OPTIMIZED) $(DEBUG) 00_example_template/$(SRC)    $(DEPS) -o 00_example_template/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 01_one_sample/$(SRC)          $(DEPS) -o 01_one_sample/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 02_time_to_botec/$(SRC)       $(DEPS) -o 02_time_to_botec/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 03_gcc_nested_function/$(SRC) $(DEPS) -o 03_gcc_nested_function/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 04_gamma_beta/$(SRC)          $(DEPS) -o 04_gamma_beta/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 05_hundred_lognormals/$(SRC)  $(DEPS) -o 05_hundred_lognormals/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 00_example_template/$(SRC)    $(DEPS) -o 00_example_template/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 01_one_sample/$(SRC)          $(DEPS) -o 01_one_sample/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 02_time_to_botec/$(SRC)       $(DEPS) -o 02_time_to_botec/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 03_gcc_nested_function/$(SRC) $(DEPS) -o 03_gcc_nested_function/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 04_gamma_beta/$(SRC)          $(DEPS) -o 04_gamma_beta/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 05_hundred_lognormals/$(SRC)  $(DEPS) -o 05_hundred_lognormals/$(OUTPUT)
 
 format-all:
 	$(FORMATTER) 00_example_template/$(SRC)
@@ -58,7 +59,7 @@ run-all:
 	
 ## make one DIR=01_one_sample
 one: $(DIR)/$(SRC)
-	$(CC) $(OPTIMIZED) $(DEBUG) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
 
 ## make format-one DIR=01_one_sample
 format-one: $(DIR)/$(SRC)
@@ -78,7 +79,7 @@ time-linux-one: $(DIR)/$(OUTPUT)
 profile-linux-one: 
 	echo "Requires perf, which depends on the kernel version, and might be in linux-tools package or similar"
 	echo "Must be run as sudo"
-	$(CC) $(OPTIMIZED) $(DEBUG) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
 	# $(CC) $(SRC) $(DEPS) -o $(OUTPUT)
 	sudo perf record $(DIR)/$(OUTPUT)
 	sudo perf report
diff --git a/examples/more/00_example_template/example b/examples/more/00_example_template/example
index 01a31ff..13faf0b 100755
Binary files a/examples/more/00_example_template/example and b/examples/more/00_example_template/example differ
diff --git a/examples/more/01_sample_from_cdf/example b/examples/more/01_sample_from_cdf/example
index 2a13776..fa30618 100755
Binary files a/examples/more/01_sample_from_cdf/example and b/examples/more/01_sample_from_cdf/example differ
diff --git a/examples/more/02_sample_from_cdf_beta/example b/examples/more/02_sample_from_cdf_beta/example
index 3fb45c1..09a872d 100755
Binary files a/examples/more/02_sample_from_cdf_beta/example and b/examples/more/02_sample_from_cdf_beta/example differ
diff --git a/examples/more/03_ci_beta/example b/examples/more/03_ci_beta/example
index 43c4735..dd0554a 100755
Binary files a/examples/more/03_ci_beta/example and b/examples/more/03_ci_beta/example differ
diff --git a/examples/more/04_nuclear_war/example b/examples/more/04_nuclear_war/example
index 8049f77..162faa5 100755
Binary files a/examples/more/04_nuclear_war/example and b/examples/more/04_nuclear_war/example differ
diff --git a/examples/more/05_burn_10kg_fat/example b/examples/more/05_burn_10kg_fat/example
index 5ce3858..78ce7aa 100755
Binary files a/examples/more/05_burn_10kg_fat/example and b/examples/more/05_burn_10kg_fat/example differ
diff --git a/examples/more/06_nuclear_recovery/example b/examples/more/06_nuclear_recovery/example
index 1c9db11..99590aa 100755
Binary files a/examples/more/06_nuclear_recovery/example and b/examples/more/06_nuclear_recovery/example differ
diff --git a/examples/more/07_algebra/example b/examples/more/07_algebra/example
index b7b4b7a..1ec780a 100755
Binary files a/examples/more/07_algebra/example and b/examples/more/07_algebra/example differ
diff --git a/examples/more/08_algebra_and_conversion/example b/examples/more/08_algebra_and_conversion/example
index 77a65dd..4b206e5 100755
Binary files a/examples/more/08_algebra_and_conversion/example and b/examples/more/08_algebra_and_conversion/example differ
diff --git a/examples/more/09_ergonomic_algebra/example b/examples/more/09_ergonomic_algebra/example
index 4fdd5e3..47723d9 100755
Binary files a/examples/more/09_ergonomic_algebra/example and b/examples/more/09_ergonomic_algebra/example differ
diff --git a/examples/more/10_twitter_thread_example/example b/examples/more/10_twitter_thread_example/example
index 35a2a73..5a93e07 100755
Binary files a/examples/more/10_twitter_thread_example/example and b/examples/more/10_twitter_thread_example/example differ
diff --git a/examples/more/11_billion_lognormals_paralell/example b/examples/more/11_billion_lognormals_paralell/example
index 8caec3e..7289d0a 100755
Binary files a/examples/more/11_billion_lognormals_paralell/example and b/examples/more/11_billion_lognormals_paralell/example differ
diff --git a/examples/more/12_time_to_botec_parallel/example b/examples/more/12_time_to_botec_parallel/example
index 3e9f501..756ea5c 100755
Binary files a/examples/more/12_time_to_botec_parallel/example and b/examples/more/12_time_to_botec_parallel/example differ
diff --git a/examples/more/13_parallelize_min/example b/examples/more/13_parallelize_min/example
index d482fb9..f44dd39 100755
Binary files a/examples/more/13_parallelize_min/example and b/examples/more/13_parallelize_min/example differ
diff --git a/examples/more/14_check_confidence_interval/example b/examples/more/14_check_confidence_interval/example
index 6d6c56c..633ea0b 100755
Binary files a/examples/more/14_check_confidence_interval/example and b/examples/more/14_check_confidence_interval/example differ
diff --git a/examples/more/makefile b/examples/more/makefile
index 0ad04a8..b9a6108 100644
--- a/examples/more/makefile
+++ b/examples/more/makefile
@@ -25,6 +25,7 @@ DEPS=$(SQUIGGLE) $(SQUIGGLE_MORE) $(MATH) $(OPENMP)
 
 ## Flags
 DEBUG= #'-g'
+WARN=-Wall -Wextra -Wno-unused-parameter
 STANDARD=-std=c99
 WARNINGS=-Wall
 OPTIMIZED=-O3  #-Ofast
@@ -35,21 +36,21 @@ FORMATTER=clang-format -i -style=$(STYLE_BLUEPRINT)
 
 ## make all
 all:
-	$(CC) $(OPTIMIZED) $(DEBUG) 00_example_template/$(SRC)             $(DEPS) -o 00_example_template/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 01_sample_from_cdf/$(SRC)              $(DEPS) -o 01_sample_from_cdf/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 02_sample_from_cdf_beta/$(SRC)         $(DEPS) -o 02_sample_from_cdf_beta/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 03_ci_beta/$(SRC)                      $(DEPS) -o 03_ci_beta/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 04_nuclear_war/$(SRC)                  $(DEPS) -o 04_nuclear_war/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 05_burn_10kg_fat/$(SRC)                $(DEPS) -o 05_burn_10kg_fat/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 06_nuclear_recovery/$(SRC)             $(DEPS) -o 06_nuclear_recovery/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 07_algebra/$(SRC)                      $(DEPS) -o 07_algebra/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 08_algebra_and_conversion/$(SRC)       $(DEPS) -o 08_algebra_and_conversion/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 09_ergonomic_algebra/$(SRC)            $(DEPS) -o 09_ergonomic_algebra/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 10_twitter_thread_example/$(SRC)       $(DEPS) -o 10_twitter_thread_example/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 11_billion_lognormals_paralell/$(SRC)  $(DEPS) -o 11_billion_lognormals_paralell/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 12_time_to_botec_parallel/$(SRC)       $(DEPS) -o 12_time_to_botec_parallel/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 13_parallelize_min/$(SRC)              $(DEPS) -o 13_parallelize_min/$(OUTPUT)
-	$(CC) $(OPTIMIZED) $(DEBUG) 14_check_confidence_interval/$(SRC)    $(DEPS) -o 14_check_confidence_interval/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 00_example_template/$(SRC)             $(DEPS) -o 00_example_template/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 01_sample_from_cdf/$(SRC)              $(DEPS) -o 01_sample_from_cdf/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 02_sample_from_cdf_beta/$(SRC)         $(DEPS) -o 02_sample_from_cdf_beta/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 03_ci_beta/$(SRC)                      $(DEPS) -o 03_ci_beta/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 04_nuclear_war/$(SRC)                  $(DEPS) -o 04_nuclear_war/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 05_burn_10kg_fat/$(SRC)                $(DEPS) -o 05_burn_10kg_fat/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 06_nuclear_recovery/$(SRC)             $(DEPS) -o 06_nuclear_recovery/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 07_algebra/$(SRC)                      $(DEPS) -o 07_algebra/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 08_algebra_and_conversion/$(SRC)       $(DEPS) -o 08_algebra_and_conversion/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 09_ergonomic_algebra/$(SRC)            $(DEPS) -o 09_ergonomic_algebra/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 10_twitter_thread_example/$(SRC)       $(DEPS) -o 10_twitter_thread_example/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 11_billion_lognormals_paralell/$(SRC)  $(DEPS) -o 11_billion_lognormals_paralell/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 12_time_to_botec_parallel/$(SRC)       $(DEPS) -o 12_time_to_botec_parallel/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 13_parallelize_min/$(SRC)              $(DEPS) -o 13_parallelize_min/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) 14_check_confidence_interval/$(SRC)    $(DEPS) -o 14_check_confidence_interval/$(OUTPUT)
 
 format-all:
 	$(FORMATTER) 00_example_template/$(SRC)
@@ -87,7 +88,7 @@ run-all:
 
 ## make one DIR=06_nuclear_recovery
 one: $(DIR)/$(SRC)
-	$(CC) $(OPTIMIZED) $(DEBUG) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
 
 ## make format-one DIR=06_nuclear_recovery
 format-one: $(DIR)/$(SRC)
@@ -107,7 +108,7 @@ time-linux-one: $(DIR)/$(OUTPUT)
 profile-linux-one: 
 	echo "Requires perf, which depends on the kernel version, and might be in linux-tools package or similar"
 	echo "Must be run as sudo"
-	$(CC) $(OPTIMIZED) $(DEBUG) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
+	$(CC) $(OPTIMIZED) $(DEBUG) $(WARN) $(DIR)/$(SRC) $(DEPS) -o $(DIR)/$(OUTPUT)
 	# $(CC) $(SRC) $(DEPS) -o $(OUTPUT)
 	sudo perf record $(DIR)/$(OUTPUT)
 	sudo perf report
diff --git a/squiggle.c b/squiggle.c
index 1d0224c..0e5950f 100644
--- a/squiggle.c
+++ b/squiggle.c
@@ -7,8 +7,9 @@
 #define PI 3.14159265358979323846 // M_PI in gcc gnu99
 #define NORMAL90CONFIDENCE 1.6448536269514727
 
-// Pseudo Random number generator
-static uint64_t xorshift32(uint32_t* seed)
+// Pseudo Random number generators
+
+static uint64_t xorshift64(uint64_t* seed)
 {
     // Algorithm "xor" from p. 4 of Marsaglia, "Xorshift RNGs"
     // See:
@@ -19,19 +20,20 @@ static uint64_t xorshift32(uint32_t* seed)
     //   <https://prng.di.unimi.it/>
     uint64_t x = *seed;
     x ^= x << 13;
-    x ^= x >> 17;
-    x ^= x << 5;
-    return *seed = x;
-}
-
-static uint64_t xorshift64(uint64_t* seed)
-{
-    // same as above, but for generating doubles instead of floats
-    uint64_t x = *seed;
-    x ^= x << 13;
     x ^= x >> 7;
     x ^= x << 17;
     return *seed = x;
+
+    /* 
+    // if one wanted to generate 32 bit ints, 
+    // from which to generate floats,
+    // one could do the following: 
+    uint32_t x = *seed;
+    x ^= x << 13;
+    x ^= x >> 17;
+    x ^= x << 5;
+    return *seed = x;
+    */
 }
 
 // Distribution & sampling functions
diff --git a/squiggle_more.c b/squiggle_more.c
index e4d7ca0..de3494f 100644
--- a/squiggle_more.c
+++ b/squiggle_more.c
@@ -30,7 +30,7 @@ void sampler_parallel(double (*sampler)(uint64_t* seed), double* results, int n_
 
     uint64_t** seeds = malloc(n_threads * sizeof(uint64_t*));
     srand(1);
-    for (uint64_t i = 0; i < n_threads; i++) {
+    for (int i = 0; i < n_threads; i++) {
         seeds[i] = malloc(sizeof(uint64_t));
         // Constraints:
         // - xorshift can't start with 0
@@ -61,7 +61,7 @@ void sampler_parallel(double (*sampler)(uint64_t* seed), double* results, int n_
         // we can just reuse a seed, this isn't problematic because we are not doing multithreading
     }
 
-    for (uint64_t i = 0; i < n_threads; i++) {
+    for (int i = 0; i < n_threads; i++) {
         free(seeds[i]);
     }
     free(seeds);