diff --git a/src/pyoptinterface/_src/codegen_c.py b/src/pyoptinterface/_src/codegen_c.py
index 8d61256..a62ca05 100644
--- a/src/pyoptinterface/_src/codegen_c.py
+++ b/src/pyoptinterface/_src/codegen_c.py
@@ -38,12 +38,30 @@
 def generate_csrc_prelude(io: IO[str]):
     io.write(
         """// includes
-#include "stddef.h"
-#include "math.h"
+#include <stddef.h>
 
 // typedefs
 typedef double float_point_t;
 
+// declare mathematical functions
+#define UNARY(f) float_point_t f(float_point_t x)
+#define BINARY(f) float_point_t f(float_point_t x, float_point_t y)
+
+// unary functions
+UNARY(fabs);
+UNARY(acos);
+UNARY(asin);
+UNARY(atan);
+UNARY(cos);
+UNARY(exp);
+UNARY(log);
+UNARY(sin);
+UNARY(sqrt);
+UNARY(tan);
+
+// binary functions
+BINARY(pow);
+
 // externals
 // azmul
 float_point_t azmul(float_point_t x, float_point_t y)
diff --git a/src/pyoptinterface/_src/jit_c.py b/src/pyoptinterface/_src/jit_c.py
index 7c9c391..e6a6251 100644
--- a/src/pyoptinterface/_src/jit_c.py
+++ b/src/pyoptinterface/_src/jit_c.py
@@ -20,11 +20,11 @@
 # On Linux/Mac, tcc has lib/tcc/include/ and lib/tcc/libtcc1.a which must be included in compilation
 libtcc_extra_include_path = None
 libtcc_extra_lib_path = None
-libtcc_extra_lib_name = None
+libtcc_extra_lib_names = None
 if system in ["Linux", "Darwin"]:
     libtcc_extra_include_path = os.path.join(libtcc_dir, "tcc", "include")
     libtcc_extra_lib_path = os.path.join(libtcc_dir, "tcc")
-    libtcc_extra_lib_name = "libtcc1.a"
+    libtcc_extra_lib_names = []
 
 # Define types
 TCCState = ctypes.c_void_p
@@ -82,9 +82,10 @@ def create_state(self):
                 == -1
             ):
                 raise Exception("Failed to add extra library path")
-        if libtcc_extra_lib_name:
-            if self.libtcc.tcc_add_library(state, libtcc_extra_lib_name.encode()) == -1:
-                raise Exception("Failed to add extra library")
+        if libtcc_extra_lib_names:
+            for name in libtcc_extra_lib_names:
+                if self.libtcc.tcc_add_library(state, name.encode()) == -1:
+                    raise Exception("Failed to add extra library")
 
         self.states.append(state)
 
diff --git a/tests/test_nlp.py b/tests/test_nlp.py
index 83effed..c8e8e8b 100644
--- a/tests/test_nlp.py
+++ b/tests/test_nlp.py
@@ -157,6 +157,8 @@ def con(vars):
 
 
 if __name__ == "__main__":
-    test_ipopt(ipopt.Model)
-    test_nlp_param(ipopt.Model)
-    test_nlfunc_ifelse(ipopt.Model)
+    def c():
+        return ipopt.Model(jit="C")
+    test_ipopt(c)
+    test_nlp_param(c)
+    test_nlfunc_ifelse(c)