[Bug 3809] snprintf const char *fmt detection false negatives with Clang and _FORTIFY_SOURCE=2

[bugzilla-daemon at mindrot.org]

https://bugzilla.mindrot.org/show_bug.cgi?id=3809

--- Comment #3 from Darren Tucker <dtucker at dtucker.net> ---
Which version of FreeBSD are you seeing this on?  I can't reproduce the
problem on 14.2, either with the standalone test or configure:

$ uname -a
FreeBSD fbsd14 14.2-RELEASE-p1 FreeBSD 14.2-RELEASE-p1 GENERIC amd64

$ clang -D_FORTIFY_SOURCE=2 conftest.c

$ ./configure --with-cflags=-D_FORTIFY_SOURCE=2 2>&1 | grep snprintf
checking for snprintf... yes
checking for vsnprintf... yes
checking whether snprintf correctly terminates long strings... yes
checking whether snprintf understands %zu... yes
checking whether vsnprintf returns correct values on overflow... yes
checking whether snprintf can declare const char *fmt... yes

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