Update README.md

README.md

@@ -18,12 +18,14 @@ We provide precompiled CUTEst libraries and executables in the [releases tab](ht
 CUTEst can be installed using the [Meson build system](https://mesonbuild.com) (all commands below are to be run from the top of the source tree):
 
 ```shell
-meson setup builddir
+meson setup builddir -Dtests=true
 meson compile -C builddir
 meson install -C builddir
 meson test -C builddir
 ```
 
+For more comprehensive Meson options (`-Doption=value`), including how to compile CUTEst in **quaduple** precision, please see [meson_options.txt](https://raw.githubusercontent.com/ralna/CUTEst/refs/heads/master/meson_options.txt).
+
 CUTEst can also be installed via the "make" build system based on [ARCHDefs](https://github.com/ralna/ARCHDefs).
 To use this variant, follow the instructions in the CUTEst [wiki](https://github.com/ralna/CUTEst/wiki).
 
@@ -35,6 +37,8 @@ To use this variant, follow the instructions in the CUTEst [wiki](https://github
 
 - [MatCUTEst](https://github.com/matcutest/matcutest) is the MATLAB interface of CUTEst.
 
+- CUTEst also provides a C interface; details can be found in the [README.C](https://raw.githubusercontent.com/ralna/CUTEst/refs/heads/master/doc/README.C).
+
 ## Note
 
 The latest features added in the release `v2.3.0` of CUTEst require at least the version `v2.6.1` of [SIFDecode](https://github.com/ralna/SIFDecode).