I've placed binaries objc-3.4.11-1.i586.rpm and objc-3.4.10-1.x86_64.rpm for openSUSE Tumbleweed with Linux kernel 6.17.6-1 and gcc 15.2.1 using automake 1.18, autoconf 2.72 and byacc 20241231 in the openSUSE folder at https://sourceforge.net/projects/objc/files/opensuse/. The amd64 64bit rpm also installs on openSUSE Leap 16, it seems.
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I've placed binaries objc-3.4.11-1.i586.rpm and objc-3.4.10-1.x86_64.rpm for openSUSE Tumbleweed with Linux kernel 6.17.6-1 and gcc 15.2.1 using automake 1.18, autoconf 2.72 and byacc 20241231 in the openSUSE folder at https://sourceforge.net/projects/objc/files/opensuse/. The amd64 64bit rpm also installs on openSUSE Leap 16, it seems.