https://bugs.gentoo.org/934379
https://src.fedoraproject.org/rpms/libapreq2/blob/rawhide/f/libapreq2-2.12-install.patch

From: Lubomir Rintel <lkundrak@v3.sk>

APR shared objects were not properly linked when they were installed to a
specific DESTDIR. This was broken in r733406, which attempted to fix
rpaths for the obscure platforms that still use them.

With this applied, we call apreq2-config we just installed and add a library
path of libraries in DESTDIR to linker.

$ perl -MAPR::Request
Can't load '/usr/lib/perl5/auto/APR/Request/Request.so' for module APR::Request: /usr/lib/perl5/auto/APR/Request/Request.so: undefined symbol: apreq_hook_disable_uploads at /usr/lib/perl5/DynaLoader.pm line 200.
 at - line 0
Compilation failed in require.
BEGIN failed--compilation aborted.

--- a/glue/Makefile.am
+++ b/glue/Makefile.am
@@ -15,7 +15,9 @@ perl_test: perl/Makefile
 	cd perl; $(MAKE) test
 
 perl_install:
-	cd perl; INSTALL=1 @PERL@ @PERL_OPTS@ Makefile.PL -apxs @APACHE2_APXS@ @MM_OPTS@
+	cd perl; INSTALL=1 PKG_CONFIG_PATH=$(DESTDIR)$(libdir)/pkgconfig \
+		DESTDIR=$(DESTDIR) LIBDIR=$(libdir) \
+		@PERL@ @PERL_OPTS@ Makefile.PL -apxs @APACHE2_APXS@ @MM_OPTS@
 	cd perl; $(MAKE) install
 
 perl_clean:
--- a/glue/perl/Makefile.PL
+++ b/glue/perl/Makefile.PL
@@ -136,10 +136,15 @@ if (WIN32) {
     my $apreq2_config = "$base_dir/apreq2-config";
     my $bindir = qx{$apreq2_config --bindir};
     chomp $bindir;
-    $apreq2_config = "$bindir/apreq2-config" if $ENV{INSTALL};
+    $apreq2_config = "PKG_CONFIG_PATH=$ENV{PKG_CONFIG_PATH} ".
+                     $ENV{DESTDIR}."$bindir/apreq2-config"
+                     if $ENV{INSTALL};
     $apreq_libs = qx{$apreq2_config --link-ld --ldflags --libs};
+    die "Failed to run $apreq2_config" if $?;
     chomp $apreq_libs;
+    $apreq_libs = " -L".$ENV{DESTDIR}.$ENV{LIBDIR}." ".$apreq_libs
+                  if $ENV{INSTALL};
 }
 
 my $mp2_typemaps = Apache2::Build->new->typemaps;