gnumake: fix build on cygwin (#476284)

pkgs/development/tools/build-managers/gnumake/default.nix

@@ -3,6 +3,7 @@
   stdenv,
   fetchurl,
   autoreconfHook,
+  gettext,
   guileSupport ? false,
   guile,
   # avoid guile depend on bootstrap to prevent dependency cycles
@@ -43,9 +44,17 @@ stdenv.mkDerivation (finalAttrs: {
     autoreconfHook
     pkg-config
   ];
-  buildInputs = lib.optionals guileEnabled [ guile ];
+  buildInputs =
+    lib.optionals guileEnabled [ guile ]
+    # gettext gets pulled in via autoreconfHook because strictDeps is not set,
+    # and is linked against. Without this, it doesn't end up in HOST_PATH.
+    # TODO: enable strictDeps, and either make this dependency explicit, or remove it
+    ++ lib.optional stdenv.isCygwin gettext;
 
-  configureFlags = lib.optional guileEnabled "--with-guile";
+  configureFlags =
+    lib.optional guileEnabled "--with-guile"
+    # fnmatch.c:124:14: error: conflicting types for 'getenv'; have 'char *(void)'
+    ++ lib.optional stdenv.hostPlatform.isCygwin "CFLAGS=-std=gnu17";
 
   outputs = [
     "out"