New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/31552#issuecomment-890326119

Comment:
Cross compilation works when keyanalyze is build separately:

```
post_patch() {
       vsed -i Makefile -e 's/keyanalyze//'
}
```

``` bash
# Template file for 'keyanalyze'
pkgname=keyanalyze
version=2.11
revision=1
wrksrc="signing-party-v${version}"
build_wrksrc="keyanalyze/pgpring"
build_style=gnu-configure
make_install_args="-C .."
hostmakedepends="autoconf automake"
makedepends="libmd-devel"
short_desc="Analyses the relationships between the keys in public key ring"
maintainer=" <@>"
license="GPL-2.0-only"
homepage="https://salsa.debian.org/signing-party-team/signing-party"
distfiles="https://salsa.debian.org/signing-party-team/signing-party/-/archive/v${version}/signing-party-v${version}.tar.gz"
checksum=e339cfea9af6f12bf09de8aa6c8972c168d2eb712cb72a8a7415e3f7ecb43cf2

pre_configure() {
	autoreconf -fi
}

post_build() {
	cd ..
	vsed -i Makefile -e '/all:/s:pgpring/pgpring::'
	make CFLAGS="$CFLAGS"
}
```