[PR PATCH] php: fix cross build

[newbluemoon <newbluemoon@users.noreply.github.com>]

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There is a new pull request by newbluemoon against master on the void-packages repository

https://github.com/newbluemoon/void-packages php
https://github.com/void-linux/void-packages/pull/22019

php: fix cross build
Dynamic loading of extensions was disabled,
because configure cannot determine if dlopen
is available (executes test program).
Override this test by using values taken
from a native build.

closes #21982 and #21852 

Did a short test run on armv7l, extensions are now found.
The short test one-liner from #21852
 `php -r 'new SQLite3("db");'` 
works, too.

A patch file from https://github.com/void-linux/void-packages/pull/22019.patch is attached

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From ed2585780340df55e312faa3bae7235c02b7f8c7 Mon Sep 17 00:00:00 2001
From: newbluemoon <blaumolch@mailbox.org>
Date: Sat, 16 May 2020 21:38:01 +0200
Subject: [PATCH] php: fix cross build

Dynamic loading of extensions was disabled,
because configure cannot determine if dlopen
is available (executes test program).
Override this test by using values taken
from a native build.
---
 srcpkgs/php/template | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/srcpkgs/php/template b/srcpkgs/php/template
index 4aea307bdb6..40cd5593b5b 100644
--- a/srcpkgs/php/template
+++ b/srcpkgs/php/template
@@ -1,7 +1,7 @@
 # Template file for 'php'
 pkgname=php
 version=7.4.6
-revision=1
+revision=2
 hostmakedepends="bison pkg-config apache-devel"
 makedepends="apache-devel enchant-devel freetds-devel freetype-devel gdbm-devel
  gmp-devel libcurl-devel libjpeg-turbo-devel libmysqlclient-devel
@@ -23,6 +23,7 @@ replaces="php-mcrypt<7.2.0"
 if [ -n "$CROSS_BUILD" ]; then
 	# php-pear needs php to build
 	hostmakedepends+=" php"
+	CFLAGS+=" -DHAVE_LIBDL -DHAVE_DLOPEN -DHAVE_DLSYM"
 fi
 
 do_build() {