Well, I just tried to repeat your steps:

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mkdir /tmp/zsh
cd /tmp/zsh
git pull git://git.code.sf.net/p/zsh/code
./.preconfig
CPPFLAGS=-I/usr/include LDFLAGS='-L/usr/lib64 -static' \
./configure --prefix=/tmp/zsh/uzsh  --enable-etcdir=/etc --with-tcsetpgrp \
--enable-function-subdirs --enable-maildir-support --enable-multibyte \
--enable-zsh-mem --enable-zsh-secure-free  --sysconfdir=/usr \
--disable-dynamic --with-term-lib="tinfow tinfo" --enable-pcre \
--disable-dynamic

# yeah, even with double `disable-dynamic like in yours)

sed -i -e '/name=zsh\/(pcre|regex)/s/link=no/link=static/' config.modules
make

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Then I called ./Src/zsh -f, and...

note%  setopt rematchpcre
note%  [[ 'foo→bar' =~ .([^[:ascii:]]). ]]; print $MATCH
zsh: module `zsh/pcre' has no such feature: `C:pcre-match'
zsh: -pcre-match not available for regex

So, it seems, it is either somehow related to linux only, or to libpcre 
version, maybe...