change local lib headers to be relative for those pointing at "include/" dir

added relative paths to header files imported from src directory

added include guards for contrib/ files when referring to secp256k1.h

src/modules/ecdh/main_impl.h

@@ -7,8 +7,8 @@
 #ifndef SECP256K1_MODULE_ECDH_MAIN_H
 #define SECP256K1_MODULE_ECDH_MAIN_H
 
-#include "include/secp256k1_ecdh.h"
-#include "ecmult_const_impl.h"
+#include "../../../include/secp256k1_ecdh.h"
+#include "../../ecmult_const_impl.h"
 
 static int ecdh_hash_function_sha256(unsigned char *output, const unsigned char *x32, const unsigned char *y32, void *data) {
     unsigned char version = (y32[31] & 0x01) | 0x02;

src/modules/extrakeys/main_impl.h

@@ -7,8 +7,8 @@
 #ifndef SECP256K1_MODULE_EXTRAKEYS_MAIN_H
 #define SECP256K1_MODULE_EXTRAKEYS_MAIN_H
 
-#include "include/secp256k1.h"
-#include "include/secp256k1_extrakeys.h"
+#include "../../../include/secp256k1.h"
+#include "../../../include/secp256k1_extrakeys.h"
 
 static SECP256K1_INLINE int secp256k1_xonly_pubkey_load(const secp256k1_context* ctx, secp256k1_ge *ge, const secp256k1_xonly_pubkey *pubkey) {
     return secp256k1_pubkey_load(ctx, ge, (const secp256k1_pubkey *) pubkey);

src/modules/extrakeys/tests_exhaustive_impl.h

@@ -8,7 +8,7 @@
 #define SECP256K1_MODULE_EXTRAKEYS_TESTS_EXHAUSTIVE_H
 
 #include "src/modules/extrakeys/main_impl.h"
-#include "include/secp256k1_extrakeys.h"
+#include "../../../include/secp256k1_extrakeys.h"
 
 static void test_exhaustive_extrakeys(const secp256k1_context *ctx, const secp256k1_ge* group) {
     secp256k1_keypair keypair[EXHAUSTIVE_TEST_ORDER - 1];

src/modules/extrakeys/tests_impl.h

@@ -7,7 +7,7 @@
 #ifndef SECP256K1_MODULE_EXTRAKEYS_TESTS_H
 #define SECP256K1_MODULE_EXTRAKEYS_TESTS_H
 
-#include "secp256k1_extrakeys.h"
+#include "../../../include/secp256k1_extrakeys.h"
 
 static secp256k1_context* api_test_context(int flags, int *ecount) {
     secp256k1_context *ctx0 = secp256k1_context_create(flags);

src/modules/recovery/main_impl.h

@@ -7,7 +7,7 @@
 #ifndef SECP256K1_MODULE_RECOVERY_MAIN_H
 #define SECP256K1_MODULE_RECOVERY_MAIN_H
 
-#include "include/secp256k1_recovery.h"
+#include "../../../include/secp256k1_recovery.h"
 
 static void secp256k1_ecdsa_recoverable_signature_load(const secp256k1_context* ctx, secp256k1_scalar* r, secp256k1_scalar* s, int* recid, const secp256k1_ecdsa_recoverable_signature* sig) {
     (void)ctx;

src/modules/recovery/tests_exhaustive_impl.h

@@ -8,7 +8,7 @@
 #define SECP256K1_MODULE_RECOVERY_EXHAUSTIVE_TESTS_H
 
 #include "src/modules/recovery/main_impl.h"
-#include "include/secp256k1_recovery.h"
+#include "../../../include/secp256k1_recovery.h"
 
 void test_exhaustive_recovery_sign(const secp256k1_context *ctx, const secp256k1_ge *group) {
     int i, j, k;

src/modules/schnorrsig/main_impl.h

@@ -7,9 +7,9 @@
 #ifndef SECP256K1_MODULE_SCHNORRSIG_MAIN_H
 #define SECP256K1_MODULE_SCHNORRSIG_MAIN_H
 
-#include "include/secp256k1.h"
-#include "include/secp256k1_schnorrsig.h"
-#include "hash.h"
+#include "../../../include/secp256k1.h"
+#include "../../../include/secp256k1_schnorrsig.h"
+#include "../../hash.h"
 
 /* Initializes SHA256 with fixed midstate. This midstate was computed by applying
  * SHA256 to SHA256("BIP0340/nonce")||SHA256("BIP0340/nonce"). */

src/modules/schnorrsig/tests_exhaustive_impl.h

@@ -7,7 +7,7 @@
 #ifndef SECP256K1_MODULE_SCHNORRSIG_TESTS_EXHAUSTIVE_H
 #define SECP256K1_MODULE_SCHNORRSIG_TESTS_EXHAUSTIVE_H
 
-#include "include/secp256k1_schnorrsig.h"
+#include "../../../include/secp256k1_schnorrsig.h"
 #include "src/modules/schnorrsig/main_impl.h"
 
 static const unsigned char invalid_pubkey_bytes[][32] = {

src/modules/schnorrsig/tests_impl.h

@@ -7,7 +7,7 @@
 #ifndef SECP256K1_MODULE_SCHNORRSIG_TESTS_H
 #define SECP256K1_MODULE_SCHNORRSIG_TESTS_H
 
-#include "secp256k1_schnorrsig.h"
+#include "../../../include/secp256k1_schnorrsig.h"
 
 /* Checks that a bit flip in the n_flip-th argument (that has n_bytes many
  * bytes) changes the hash function