README: add note about compiler portability for RISC-V 64 and other architectures

HeliC829 · HeliC829 · commit 06b42de741cb · 2025-08-20T17:58:38.000+08:00
Signed-off-by: Julian Zhu &lt;julian.oerv@isrc.iscas.ac.cn&gt;
diff --git a/README.md b/README.md
@@ -49,6 +49,9 @@ aarch64:
     * ./configure --disable-sve2
     * make -f Makefile.unx DEFINES+=-DNO_SVE2=1
 
+RISC-V 64 and other:
+* Compiler: Portable base functions are available that build with most C compilers.
+
 ### Autotools
 To build and install the library with autotools it is usually sufficient to run:
 
