Support GCC14

[AlejandroCabeza]

Description

Compiling the test binary with gcc14 doesn't work because there's a type issue.

Context

Nim doesn't do C const pointers, and now gcc cares because the BearSSL library (properly, correctly) declares its argument to be a const pointer
Nim compiles through C, so this does matter
addr (of some var Foo) becomes Foo** not const Foo**
and BearSSL wants const Foo**
-- @tersec

see https://github.com/status-im/nim-bearssl/pull/58/files and https://github.com/status-im/nim-bearssl/pull/61/files for how part was already fixed.

There's already a PrngClassPointerConst* {.importc: "const br_prng_class**", header: "bearssl_rand.h", bycopy.} = pointer which is defined manually and then
proc ecKeygen*(rngCtx: PrngClassPointerConst; impl: ptr EcImpl; sk: ptr EcPrivateKey;

is defined in those terms
that's for another keygen. And, yeah, it's arguably a nim-bearssl issue still, just not one anyone else has run across yet
the gimmick here is that it steps outside the Nim type system proper and simply inserts the C const Foo** directly
-- @tersec

Logs

When calling nimble --mm:refc test

~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c: In function ‘random__testrsa_u138’:
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:1703:31: error: passing argument 1 of ‘keygen’ from incompatible pointer type [-Wincompatible-pointer-types]
 1703 |                 T7_ = keygen(((br_prng_class**) (&(*rng_p1).vtable)), ((br_rsa_private_key*) ((&(*res).seck))), ((void*) ((&(*res).buffer->data[sko]))), ((br_rsa_public_key*) ((&(*res).pubk))), ((void*) ((&(*res).buffer->data[pko]))), ((unsigned int) (bits_p2)), pubexp_p3);
      |                              ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                               |
      |                               br_prng_class ** {aka struct br_prng_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:1703:31: note: expected ‘const br_prng_class **’ {aka ‘const struct br_prng_class_ **’} but argument is of type ‘br_prng_class **’ {aka ‘struct br_prng_class_ **’}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c: In function ‘sign__testrsa_u2751’:
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:4270:37: error: passing argument 1 of ‘kv->init’ from incompatible pointer type [-Wincompatible-pointer-types]
 4270 |         nimln_(757);    (*kv).init(((br_hash_class**) (&hc.vtable)));
      |                                    ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                     |
      |                                     br_hash_class ** {aka struct br_hash_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:4270:37: note: expected ‘const br_hash_class **’ {aka ‘const struct br_hash_class_ **’} but argument is of type ‘br_hash_class **’ {aka ‘struct br_hash_class_ **’}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:4274:31: error: passing argument 1 of ‘kv->update’ from incompatible pointer type [-Wincompatible-pointer-types]
 4274 |                 (*kv).update(((br_hash_class**) (&hc.vtable)), ((void*) ((&message_p1[((NI)0)]))), ((NU) (message_p1Len_0)));
      |                              ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                               |
      |                               br_hash_class ** {aka struct br_hash_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c:4274:31: note: expected ‘const br_hash_class **’ {aka ‘const struct br_hash_class_ **’} but argument is of type ‘br_hash_class **’ {aka ‘struct br_hash_class_ **’}
compilation terminated due to -fmax-errors=3.
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c: In function ‘sign__testecnist_u2611’:
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2967:53: error: passing argument 1 of ‘kv->init’ from incompatible pointer type [-Wincompatible-pointer-types]
 2967 |                 nimln_(943);            (*kv).init(((br_hash_class**) (&hc.vtable)));
      |                                                    ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                     |
      |                                                     br_hash_class ** {aka struct br_hash_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2967:53: note: expected ‘const br_hash_class **’ {aka ‘const struct br_hash_class_ **’} but argument is of type ‘br_hash_class **’ {aka ‘struct br_hash_class_ **’}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2971:39: error: passing argument 1 of ‘kv->update’ from incompatible pointer type [-Wincompatible-pointer-types]
 2971 |                         (*kv).update(((br_hash_class**) (&hc.vtable)), ((void*) ((&message_p1[((NI)0)]))), ((NU) (message_p1Len_0)));
      |                                      ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                       |
      |                                       br_hash_class ** {aka struct br_hash_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2971:39: note: expected ‘const br_hash_class **’ {aka ‘const struct br_hash_class_ **’} but argument is of type ‘br_hash_class **’ {aka ‘struct br_hash_class_ **’}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2976:71: error: passing argument 1 of ‘kv->update’ from incompatible pointer type [-Wincompatible-pointer-types]
 2976 |                         nimln_(947);                    (*kv).update(((br_hash_class**) (&hc.vtable)), NIM_NIL, ((NU)0));
      |                                                                      ~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                                                       |
      |                                                                       br_hash_class ** {aka struct br_hash_class_ **}
~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@secnist.nim.c:2976:71: note: expected ‘const br_hash_class **’ {aka ‘const struct br_hash_class_ **’} but argument is of type ‘br_hash_class **’ {aka ‘struct br_hash_class_ **’}
compilation terminated due to -fmax-errors=3.
Error: execution of an external compiler program 'gcc -c  -w -fmax-errors=3 -pthread -I~/.nimble/pkgs2/bearssl-0.2.4-f350e073a33be84afd879416279a4679c227c6d4/bearssl/abi -I~/.nimble/pkgs2/bearssl-0.2.4-f350e073a33be84afd879416279a4679c227c6d4/bearssl/abi/../csources/src/ -I~/.nimble/pkgs2/bearssl-0.2.4-f350e073a33be84afd879416279a4679c227c6d4/bearssl/abi/../csources/inc/ -I~/.nimble/pkgs2/bearssl-0.2.4-f350e073a33be84afd879416279a4679c227c6d4/bearssl/abi/../csources/tools/ -DBR_USE_UNIX_TIME=1 -DBR_USE_URANDOM=1 -DBR_LE_UNALIGNED=1 -DBR_64=1  -DBR_amd64=1 -DBR_INT128=1 -O3 -fno-strict-aliasing -fno-ident -fno-math-errno   -I~/.choosenim/toolchains/nim-2.0.8/lib -I~/Projects/nim-libp2p-2/tests -o ~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c.o ~/.cache/nim/testnative_d/@m..@slibp2p@scrypto@srsa.nim.c' failed with exit code: 1


stack trace: (most recent call last)
/tmp/nimblecache-1634003104/nimscriptapi_1746015816.nim(212, 16)
~/Projects/nim-libp2p-2/libp2p.nimble(53, 10) testnativeTask
~/Projects/nim-libp2p-2/libp2p.nimble(36, 3) runTest
~/.choosenim/toolchains/nim-2.0.8/lib/system/nimscript.nim(265, 7) exec
~/.choosenim/toolchains/nim-2.0.8/lib/system/nimscript.nim(265, 7) Error: unhandled exception: FAILED: nim c -d:debug  --styleCheck:usages --styleCheck:error --verbosity:0 --hints:off --skipParentCfg --skipUserCfg -f --threads:on --opt:speed  -d:libp2p_pubsub_sign=true -d:libp2p_pubsub_verify=true   -r  tests/testnative [OSError]
       Tip: 223 messages have been suppressed, use --verbose to show them.
nimscriptwrapper.nim(161) execScript

    Error:  Exception raised during nimble script execution
stack trace: (most recent call last)
/tmp/nimblecache-1634003104/nimscriptapi_1746015816.nim(212, 16)
~/Projects/nim-libp2p-2/libp2p.nimble(95, 3) testTask
~/.choosenim/toolchains/nim-2.0.8/lib/system/nimscript.nim(265, 7) exec
~/.choosenim/toolchains/nim-2.0.8/lib/system/nimscript.nim(265, 7) Error: unhandled exception: FAILED: nimble testnative [OSError]
       Tip: 223 messages have been suppressed, use --verbose to show them.
nimscriptwrapper.nim(161) execScript

    Error:  Exception raised during nimble script execution

[fryorcraken]

Looks like fix is wip: status-im/nim-bearssl#62