librandombytes: init at 20240318

Co-authored-by: Abdullah Imad <me@imad.nyc>
Co-authored-by: Alberto Merino <amerinor01@gmail.com>
Co-authored-by: Enric Morales <me@enric.me>
Co-authored-by: Jack Leightcap <jack@leightcap.com>
Co-authored-by: Roland Coeurjoly <rolandcoeurjoly@gmail.com>
Signed-off-by: Jack Leightcap <jack@leightcap.com>

updated the patch for cross compilin

fixed patch

Apply suggestions from code review

Co-authored-by: Weijia Wang <9713184+wegank@users.noreply.github.com>

pkgs/by-name/li/librandombytes/environment-variable-tools.patch

@@ -0,0 +1,34 @@
+diff --git a/configure b/configure
+index 36fcf67..39612f3 100755
+--- a/configure
++++ b/configure
+@@ -143,6 +143,16 @@ firstcompiler = None
+ with open('compilers/default') as f:
+   for c in f.readlines():
+     c = c.strip()
++    if env_cc := os.getenv('CC'):
++      c_as_list= c.split()
++      # check if the compiler we're testing has the name inside the last
++      # part of the CC env var
++      # i.e. gcc == x86_64-linux-unknown-gnu-gcc
++      # or gcc == gcc
++      if c_as_list[0] == env_cc.split("-")[-1]:
++        c_as_list[0] = env_cc
++      c = ' '.join(c_as_list)
++      log('patched command as %s' % c)   
+     cv = compilerversion(c)
+     if cv == None:
+       log('skipping default compiler %s' % c)
+diff --git a/scripts-build/staticlib b/scripts-build/staticlib
+index 7b2fc92..a6bbe41 100755
+--- a/scripts-build/staticlib
++++ b/scripts-build/staticlib
+@@ -4,6 +4,6 @@ lib="$1"
+ shift
+ 
+ rm -f package/lib/"$lib".a
+-ar cr package/lib/"$lib".a "$@"
+-ranlib package/lib/"$lib".a || :
++${AR:-ar} cr package/lib/"$lib".a "$@"
++${RANLIB:-ranlib} package/lib/"$lib".a || :
+ chmod 644 package/lib/"$lib".a

pkgs/by-name/li/librandombytes/package.nix

@@ -0,0 +1,81 @@
+{
+  stdenv,
+  lib,
+  python3,
+  openssl,
+  fetchzip,
+}:
+stdenv.mkDerivation (finalAttrs: {
+  pname = "librandombytes";
+  version = "20240318";
+
+  src = fetchzip {
+    url = "https://randombytes.cr.yp.to/librandombytes-${finalAttrs.version}.tar.gz";
+    hash = "sha256-LE8iWw7FxckPREyqefgKtslD6CPDsL7VsfHScQ6JmLs=";
+  };
+
+  patches = [ ./environment-variable-tools.patch ];
+
+  postPatch = ''
+    patchShebangs configure
+    patchShebangs scripts-build
+  '';
+
+  # NOTE: librandombytes uses a custom Python `./configure`: it does not expect standard
+  # autoconfig --build --host etc. arguments: disable
+  configurePlatforms = [ ];
+
+  # NOTE: the librandombytes library has required specific CFLAGS defined:
+  # https://randombytes.cr.yp.to/librandombytes-20240318/compilers/default.html
+  # - `-O` (alias `-O1`) safe optimization
+  # - `-Qunused-arguments` suppress clang warning
+  # the default "fortify" hardening sets -O2, -D_FORTIFY_SOURCE=2:
+  # since librandombytes uses -O1, we disable the fortify hardening, and then manually re-enable -D_FORTIFY_SOURCE.
+  hardeningDisable = [ "fortify" ];
+  env.NIX_CFLAGS_COMPILE = toString (
+    lib.optionals stdenv.cc.isClang [ "-Qunused-arguments" ]
+    ++ [
+      "-D_FORTIFY_SOURCE=2"
+      "-O1"
+    ]
+  );
+
+  nativeBuildInputs = [ python3 ];
+
+  buildInputs = [ openssl ];
+
+  meta = {
+    homepage = "https://randombytes.cr.yp.to/";
+    description = "A simple API for applications generating fresh randomness";
+    changelog = "https://randombytes.cr.yp.to/download.html";
+    license = with lib.licenses; [
+      # Upstream specifies the public domain licenses with the terms here https://cr.yp.to/spdx.html
+      publicDomain
+      cc0
+      bsd0
+      mit
+      mit0
+    ];
+    maintainers = with lib.maintainers; [
+      kiike
+      imadnyc
+      jleightcap
+    ];
+    platforms = [
+      "i686-linux"
+      "x86_64-linux"
+      "armv7a-linux"
+      "aarch64-linux"
+      # Cannot support 32 bit MIPS because options in libcpucycles only supports mips64: https://cpucycles.cr.yp.to/libcpucycles-20240318/cpucycles/options.html
+      "mips64-linux"
+      "mips64el-linux"
+      # powerpc-linux (32 bits) is supported by upstream project but not by nix
+      "powerpc64-linux"
+      "powerpc64le-linux"
+      "riscv32-linux"
+      "riscv64-linux"
+      "s390x-linux"
+      # Upstream package supports sparc, but nix does not
+    ] ++ lib.platforms.darwin; # Work on MacOS X mentioned: https://randombytes.cr.yp.to/download.html
+  };
+})