diff --git a/.travis.yml b/.travis.yml
index f5843a5..97182b8 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -31,6 +31,12 @@ script:
   - $CC -DCRON_USE_LOCAL_TIME ccronexpr.c ccronexpr_test.c -I. -Wall -Wextra -std=c89 -DCRON_TEST_MALLOC -o a.out && TZ="America/Toronto" ./a.out
   - $CXX -DCRON_USE_LOCAL_TIME ccronexpr.c ccronexpr_test.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -o a.out && TZ="America/Toronto" ./a.out
   - $CXX -DCRON_USE_LOCAL_TIME ccronexpr.c ccronexpr_test.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -DCRON_COMPILE_AS_CXX -o a.out && TZ="America/Toronto" ./a.out
+  - $CC ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c89 -DCRON_TEST_MALLOC -o a.out && ./a.out
+  - $CXX ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -o a.out && ./a.out
+  - $CXX ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -DCRON_COMPILE_AS_CXX -o a.out && ./a.out
+  - $CC -DCRON_USE_LOCAL_TIME ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c89 -DCRON_TEST_MALLOC -o a.out && TZ="America/Toronto" ./a.out
+  - $CXX -DCRON_USE_LOCAL_TIME ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -o a.out && TZ="America/Toronto" ./a.out
+  - $CXX -DCRON_USE_LOCAL_TIME ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -DCRON_COMPILE_AS_CXX -o a.out && TZ="America/Toronto" ./a.out
 
 notifications:
   email:
diff --git a/README.md b/README.md
index 3418f1c..102f937 100644
--- a/README.md
+++ b/README.md
@@ -165,6 +165,17 @@ Compilation and tests run examples
 
     cl ccronexpr.c ccronexpr_test.c /W4 /D_CRT_SECURE_NO_WARNINGS && ccronexpr.exe
 
+
+    gcc ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c89 -DCRON_TEST_MALLOC -o a.out && ./a.out
+    g++ ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -o a.out && ./a.out
+    g++ ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -DCRON_COMPILE_AS_CXX -o a.out && ./a.out
+
+    clang ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c89 -DCRON_TEST_MALLOC -o a.out && ./a.out
+    clang++ ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -o a.out && ./a.out
+    clang++ ccronexpr.c supertinycron.c -I. -Wall -Wextra -std=c++11 -DCRON_TEST_MALLOC -DCRON_COMPILE_AS_CXX -o a.out && ./a.out
+
+    cl ccronexpr.c supertinycron.c /W4 /D_CRT_SECURE_NO_WARNINGS && supertinycron.exe
+
 Examples of supported expressions
 ---------------------------------
 
diff --git a/ccronexpr.c b/ccronexpr.c
index 09abcbf..f42527e 100644
--- a/ccronexpr.c
+++ b/ccronexpr.c
@@ -1027,6 +1027,7 @@ static void set_days_of_week(char* field, uint8_t* days_of_week, int8_t* day_in_
         cron_del_bit(days_of_week, 7);
     }
     return_error:
+    return;
 }
 
 static int set_days_of_month(char* field, uint8_t* days_of_month, uint8_t* days_of_week, int8_t* day_in_month, uint8_t* flags, const char** error) {
@@ -1169,7 +1170,7 @@ void cron_parse_expr(const char* expression, cron_expr* target, const char** err
         if (*error) goto return_res;
     }
     if (len < 7) {
-        set_years("*", target->years, error);
+        set_years((char *)"*", target->years, error);
     } else {
         set_years(fields[pos], target->years, error);
     }
diff --git a/supertinycron.c b/supertinycron.c
index d7494c2..10dd2b5 100644
--- a/supertinycron.c
+++ b/supertinycron.c
@@ -13,6 +13,25 @@
     #define VERSION "dev-build"
 #endif
 
+#ifdef CRON_TEST_MALLOC
+static int cronAllocations = 0;
+static int cronTotalAllocations = 0;
+static int maxAlloc = 0;
+void* cron_malloc(size_t n) {
+    cronAllocations++;
+    cronTotalAllocations++;
+    if (cronAllocations > maxAlloc) {
+        maxAlloc = cronAllocations;
+    }
+    return malloc(n);
+}
+
+void cron_free(void* p) {
+    cronAllocations--;
+    free(p);
+}
+#endif
+
 typedef struct {
     char* shell;
     char* cmd;
@@ -103,13 +122,13 @@ int cron_system(const char *shell, const char *command) {
 }
 
 TinyCronJob optsFromEnv() {
-    TinyCronJob opts = {0};
+    TinyCronJob opts;
     if (getenv("TINYCRON_VERBOSE") != NULL) {
         opts.verbose = 1;
     }
     opts.shell = getenv("SHELL");
     if (!opts.shell) {
-        opts.shell = "/bin/sh"; 
+        opts.shell = (char *)"/bin/sh"; 
     }
     return opts;
 }
@@ -224,7 +243,7 @@ int main(int argc, char *argv[]) {
     line_len += argc - 3;
     line_len += 1;
 
-    char *line = malloc(line_len);
+    char *line = (char *)malloc(line_len);
     if (!line) {
         perror("malloc");
         return EXIT_FAILURE;