doc/bench: Added cmake build options to bench error messages

Author: kevkevinpal

src/bench.c

@@ -205,23 +205,23 @@ int main(int argc, char** argv) {
 #ifndef ENABLE_MODULE_ECDH
     if (have_flag(argc, argv, "ecdh")) {
         fprintf(stderr, "./bench: ECDH module not enabled.\n");
-        fprintf(stderr, "Use ./configure --enable-module-ecdh.\n\n");
+        fprintf(stderr, "Use ./configure --enable-module-ecdh, or compile with -DSECP256K1_ENABLE_MODULE_ECDH=ON.\n\n");
         return EXIT_FAILURE;
     }
 #endif
 
 #ifndef ENABLE_MODULE_RECOVERY
     if (have_flag(argc, argv, "recover") || have_flag(argc, argv, "ecdsa_recover")) {
         fprintf(stderr, "./bench: Public key recovery module not enabled.\n");
-        fprintf(stderr, "Use ./configure --enable-module-recovery.\n\n");
+        fprintf(stderr, "Use ./configure --enable-module-recovery, or compile with -DSECP256K1_ENABLE_MODULE_RECOVERY=ON.\n\n");
         return EXIT_FAILURE;
     }
 #endif
 
 #ifndef ENABLE_MODULE_SCHNORRSIG
     if (have_flag(argc, argv, "schnorrsig") || have_flag(argc, argv, "schnorrsig_sign") || have_flag(argc, argv, "schnorrsig_verify")) {
         fprintf(stderr, "./bench: Schnorr signatures module not enabled.\n");
-        fprintf(stderr, "Use ./configure --enable-module-schnorrsig.\n\n");
+        fprintf(stderr, "Use ./configure --enable-module-schnorrsig, or compile with -DSECP256K1_ENABLE_MODULE_SCHNORRSIG=ON.\n\n");
         return EXIT_FAILURE;
     }
 #endif
@@ -231,7 +231,7 @@ int main(int argc, char** argv) {
         have_flag(argc, argv, "encode") || have_flag(argc, argv, "decode") || have_flag(argc, argv, "ellswift_keygen") ||
         have_flag(argc, argv, "ellswift_ecdh")) {
         fprintf(stderr, "./bench: ElligatorSwift module not enabled.\n");
-        fprintf(stderr, "Use ./configure --enable-module-ellswift.\n\n");
+        fprintf(stderr, "Use ./configure --enable-module-ellswift, or compile with -DSECP256K1_ENABLE_MODULE_ELLSWIFT=ON.\n\n");
         return EXIT_FAILURE;
     }
 #endif