installation error - gcc ISO C90 Forbids mixed declarations and code in libev.h:25 · Issue #448 · gevent/gevent · GitHub
lib/libspl/zone.c error: ISO C90 forbids mixed declarations and code · Issue #3588 · openzfs/zfs · GitHub
compilation warnings: ISO C90 forbids mixing declarations and code · Issue #3131 · libuv/libuv · GitHub
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