- add future hint for x32 build requirements

Author: janekr

rust.spec

@@ -82,12 +82,12 @@ BuildRequires:	zlib-devel
 # building x86_64-hosted crosscompiler on x32 host
 BuildRequires:	gcc-multilib-64
 BuildRequires:	libstdc++-multilib-64-devel
-# how to specify?
-#BuildRequires:	curl-devel.x86_64
-#BuildRequires:	libgit2-devel.x86_64
-#BuildRequires:	llvm-devel.x86_64 >= 7.0
-#BuildRequires:	openssl-devel.x86_64
-#BuildRequires:	zlib-devel.x86_64
+# how to specify? - rpm.org adds arch provides on packages (__isa), uncomment once we switch
+#BuildRequires:	curl-devel(x86-64)
+#BuildRequires:	libgit2-devel(x86-64)
+#BuildRequires:	llvm-devel(x86-64)>= 7.0
+#BuildRequires:	openssl-devel(x86-64)
+#BuildRequires:	zlib-devel(x86-64)
 %endif
 %endif
 # The C compiler is needed at runtime just for linking.  Someday rustc might