Update, add --with gcc option to build with gcc for testing

.abf.yml

@@ -1,2 +1,2 @@
 sources:
-  systemd-245.20200601.tar.xz: 02e418814859bcf90e8be7e129f619758ea18428
+  systemd-245.20200616.tar.xz: b121e7cc98a772e0d2c3c5b7ac61c1233fbd3bd7

systemd-245-allow-compiling-with-gcc.patch

@@ -0,0 +1,18 @@
+diff -up systemd-245.20200614/src/libsystemd/disable-mempool.c.omv~ systemd-245.20200614/src/libsystemd/disable-mempool.c
+--- systemd-245.20200614/src/libsystemd/disable-mempool.c.omv~	2020-06-14 03:38:48.801773430 +0200
++++ systemd-245.20200614/src/libsystemd/disable-mempool.c	2020-06-14 03:38:55.831808656 +0200
+@@ -2,4 +2,4 @@
+
+ #include "mempool.h"
+
+-const bool mempool_use_allowed = false;
++__attribute__((used)) const bool mempool_use_allowed = false;
+diff -up systemd-245.20200614/src/shared/enable-mempool.c.omv~ systemd-245.20200614/src/shared/enable-mempool.c
+--- systemd-245.20200614/src/shared/enable-mempool.c.omv~	2020-06-14 03:38:33.224693203 +0200
++++ systemd-245.20200614/src/shared/enable-mempool.c	2020-06-14 03:38:42.750742622 +0200
+@@ -2,4 +2,4 @@
+
+ #include "mempool.h"
+
+-const bool mempool_use_allowed = true;
++__attribute__((used)) const bool mempool_use_allowed = true;

systemd-245-disable-audit-by-default.patch

@@ -7,3 +7,15 @@ diff -Naur systemd-245.20200601/src/journal/journald.conf systemd-245.20200601.t
  #ReadKMsg=yes
 -#Audit=yes
 +Audit=no
+diff -up systemd-245.20200614/src/journal/journald-server.c.omv~ systemd-245.20200614/src/journal/journald-server.c
+--- systemd-245.20200614/src/journal/journald-server.c.omv~	2020-06-14 01:38:23.830881443 +0200
++++ systemd-245.20200614/src/journal/journald-server.c	2020-06-14 01:38:33.674324363 +0200
+@@ -2214,7 +2214,7 @@ int server_init(Server *s, const char *n
+                 .compress.threshold_bytes = (uint64_t) -1,
+                 .seal = true,
+
+-                .set_audit = true,
++                .set_audit = false,
+
+                 .watchdog_usec = USEC_INFINITY,
+

systemd.spec

@@ -5,13 +5,24 @@
 %bcond_with compat32
 %endif
 
+%bcond_with gcc
+
 # (tpg) special options for systemd to keep it fast and secure
+%if %{with gcc}
 %ifnarch %{ix86}
-%global optflags %{optflags} -O2 -fexceptions -fstack-protector --param=ssp-buffer-size=32
+%global optflags %{optflags} -fexceptions -fstack-protector --param=ssp-buffer-size=32 -fPIC
+%else
+%global optflags %{optflags} -fexceptions -fstack-protector --param=ssp-buffer-size=32 -fPIC -fuse-ld=bfd
+%global ldflags %{ldflags} -fuse-ld=bfd -fPIC
+%endif
 %else
-%global optflags %{optflags} -O2 -fexceptions -fstack-protector --param=ssp-buffer-size=32 -fuse-ld=bfd
+%ifnarch %{ix86}
+%global optflags %{optflags} -fexceptions -fstack-protector --param=ssp-buffer-size=32
+%else
+%global optflags %{optflags} -fexceptions -fstack-protector --param=ssp-buffer-size=32 -fuse-ld=bfd
 %global ldflags %{ldflags} -fuse-ld=bfd
 %endif
+%endif
 
 %bcond_with bootstrap
 
@@ -50,7 +61,7 @@
 %define udev_user_rules_dir %{_sysconfdir}/udev/rules.d
 
 %define major 245
-%define stable 20200601
+%define stable 20200616
 
 Summary:	A System and Session Manager
 Name:		systemd
@@ -64,7 +75,7 @@ Source0:	systemd-%{version}.tar.xz
 Version:	%{major}
 Source0:	https://github.com/systemd/systemd/archive/v%{version}.tar.gz
 %endif
-Release:	4
+Release:	1
 License:	GPLv2+
 Group:		System/Configuration/Boot and Init
 Url:		http://www.freedesktop.org/wiki/Software/systemd
@@ -141,6 +152,7 @@ Patch126:	0036-Notify-systemd-earlier-that-resolved-is-ready.patch
 
 # (tpg) OMV patches
 Patch1000:	systemd-236-fix-build-with-LLVM.patch
+Patch1001:	systemd-245-allow-compiling-with-gcc.patch
 
 # (tpg) Fedora patches
 Patch1100:	0998-resolved-create-etc-resolv.conf-symlink-at-runtime.patch
@@ -709,6 +721,11 @@ PATH=$PWD/bin:$PATH
 %ninja_build -C build32
 %endif
 
+%if %{with gcc}
+export CC=gcc
+export CXX=g++
+export LD=gcc
+%endif
 %meson \
 	-Drootprefix="" \
 	-Drootlibdir=/%{_lib} \