Add a section for the 32-bit version.
For reference, the tests were done using a system installed from
`haiku-r1beta4-x86_64-anyboot.iso`.
+
+## 32-bit x86 R1/beta4
+
+* Both system and local libpcap are suitable.
+* Autoconf 2.71 works.
+* CMake 3.24.2 works.
+* GCC 11.2.0 works.
+* Clang does not work.
+
+The following command will install respective non-default packages:
+```
+pkgman install libpcap_x86_devel cmake_x86
+```
+
+For reference, the tests were done using a system installed from
+`haiku-r1beta4-x86_gcc2h-anyboot.iso`.