It is not possible to build Postfix on a Linux 6 system!

Build-Error: 
ATTENTION: Unknown system type: Linux 6.0.5-200.fc36.x86_64

I tried to build a patch but it returns a different error:

/usr/bin/strip: /home/builduser/rpmbuild/BUILDROOT/postfix-3.7.3-1.0.fc36.20221114.dk.sandybridge.x86_64/usr/libexec/postfix/lmtp[.interp]: file truncated

Patch1:
--- postfix-3.7.3/makedefs-orig 2022-01-23 21:53:41.000000000 +0100
+++ postfix-3.7.3/makedefs      2022-11-14 16:37:44.188079241 +0100
@@ -627,7 +627,7 @@
                : ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
                : ${PLUGIN_LD="${CC-gcc} -shared"}
                ;;
- Linux.[345].*)        SYSTYPE=LINUX$RELEASE_MAJOR
+ Linux.[3456].*)       SYSTYPE=LINUX$RELEASE_MAJOR
                case "$CCARGS" in
                 *-DNO_DB*) ;;
                 *-DHAS_DB*) ;;

Patch2:
--- postfix-3.7.3/src/util/sys_defs-original.h  2021-12-05 19:59:27.000000000 +0100
+++ postfix-3.7.3/src/util/sys_defs.h   2022-11-14 16:52:11.199899453 +0100
@@ -751,7 +751,7 @@
  /*
   * LINUX.
   */
-#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5)
+#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5) || defined(LINUX6)
 #define SUPPORTED
 #define UINT32_TYPE    unsigned int
 #define UINT16_TYPE    unsigned short

SPEC-File:
Version:                    3.7.3
# command 'rpmbuild -bb postfix.spec --with production' will tune for current hardware while default stays 'sandybridge'
%if %{?_with_production:1}%{!?_with_production:0}
%global rpmsuffix native
%global build_native_release 1
%global optflags $(sed "s/sandybridge/native/g" <<< "%{optflags}")
%else
%global rpmsuffix sandybridge
%global build_native_release 0
%endif

%define postfix_uid         89
%define postfix_user        postfix
%define postfix_gid         89
%define postfix_group       postfix
%define maildrop_group      postdrop
%define maildrop_gid        90
%define postfix_config_dir  %{_sysconfdir}/postfix
%define postfix_daemon_dir  %{_libexecdir}/postfix
%define postfix_command_dir %{_sbindir}
%define postfix_queue_dir   %{_var}/spool/postfix
%define postfix_data_dir    %{_var}/lib/postfix
%define postfix_doc_dir     %{_docdir}/%{name}-%{version}
%define postfix_sample_dir  %{postfix_doc_dir}/samples
%define postfix_readme_dir  %{postfix_doc_dir}/README_FILES
%define pflogsumm_ver       1.1.5

Name:              postfix
Summary:           Postfix Mail Transport Agent
Release:           1.%{build_native_release}%{?dist}.%{rpmsuffix}
Epoch:             2
Group:             System Environment/Daemons
URL:               http://www.postfix.org
License:           IBM
Requires:          shadow-utils, systemd-units
Requires(post):    shadow-utils, systemd-units
Requires(pre):     shadow-utils, systemd-units
Requires(preun):   shadow-utils, systemd-units
Requires(postun):  shadow-utils, systemd-units
Provides:          MTA smtpd smtpdaemon server(smtp)
Source0:           ftp://ftp.porcupine.org/mirrors/postfix-release/official/%{name}-%{version}.tar.gz
Source53:          http://jimsun.linxnet.com/downloads/pflogsumm-%{pflogsumm_ver}.tar.gz
Source101:         postfix-pam.conf
Source500:         postfix.service
Patch0:            postfix-linux-6.patch
Patch1:            postfix-linux-sys-6.patch
BuildRequires:     pkgconfig, zlib-devel, mysql-devel, cyrus-sasl-devel, pcre-devel, openssl-devel, systemd-units, libdb-devel, perl-generators, pkgconfig, libicu-devel, libnsl2-devel, gcc, m4
Provides:          postfix-perl-scripts
Provides:          postfix-pflogsumm = %{epoch}:%{version}-%{release}

%description
Postfix is a Mail Transport Agent, supporting SMTP AUTH and TLS

%package           manpages
Summary:           Postfix manuals
Group:             Applications/System
%description       manpages

%prep
%setup -q  -n %{name}-%{version}
%patch0 -p1
%patch1 -p1

gzip -dc %{SOURCE53} | tar xf -
pushd pflogsumm-%{pflogsumm_ver}
popd

for f in README_FILES/TLS_{LEGACY_,}README TLS_ACKNOWLEDGEMENTS; do
 iconv -f iso8859-1 -t utf8 -o ${f}{_,} &&
 touch -r ${f}{,_} && mv -f ${f}{_,}
done

%build
CCARGS=-fPIC
AUXLIBS=

CCARGS="${CCARGS} -DHAS_PCRE -I%{_includedir}/pcre"
AUXLIBS="${AUXLIBS} -lpcre"

CCARGS="${CCARGS} -DHAS_MYSQL -I%{_includedir}/mysql"
AUXLIBS="${AUXLIBS} -L%{_libdir}/mysql -lmysqlclient -lm"

CCARGS="${CCARGS} -DUSE_SASL_AUTH -DUSE_CYRUS_SASL -I%{_includedir}/sasl"
AUXLIBS="${AUXLIBS} -L%{_libdir}/sasl2 -lsasl2"

CCARGS="${CCARGS} -DUSE_TLS -I/usr/include/openssl"
AUXLIBS="${AUXLIBS} -lssl -lcrypto"

CCARGS="${CCARGS} -DDEF_CONFIG_DIR=\\\"%{postfix_config_dir}\\\""
CCARGS="${CCARGS} $(getconf LFS_CFLAGS)"

AUXLIBS="${AUXLIBS} -pie -Wl,-z,relro"

%{__make} %{?_smp_mflags} -f Makefile.init makefiles CCARGS="${CCARGS}" AUXLIBS="${AUXLIBS}" DEBUG=""
OPT="%{optflags} -Wno-comment"
%{__make} %{?_smp_mflags} CCARGS="${CCARGS}" AUXLIBS="${AUXLIBS}" DEBUG="" OPT="%{optflags} -Wno-comment"

%install
sh postfix-install -non-interactive install_root=%{buildroot} config_directory=%{postfix_config_dir}
daemon_directory=%{postfix_daemon_dir} command_directory=%{postfix_command_dir}
queue_directory=%{postfix_queue_dir} data_directory=%{postfix_data_dir}
sendmail_path=%{postfix_command_dir}/sendmail newaliases_path=%{_bindir}/newaliases mailq_path=%{_bindir}/mailq
mail_owner=%{postfix_user} setgid_group=%{maildrop_group} 
sample_directory=%{postfix_sample_dir} readme_directory=%{postfix_readme_dir} || exit 1
install -c auxiliary/rmail/rmail %{buildroot}%{_bindir}/rmail

for i in active bounce corrupt defer deferred flush incoming private saved maildrop public pid saved trace; do
 mkdir -p %{buildroot}%{postfix_queue_dir}/$i
done

mkdir -p %{buildroot}%{_sysconfdir}/pam.d
install -m 644 %{SOURCE101} %{buildroot}%{_sysconfdir}/pam.d/smtp.postfix

mkdir -p %{buildroot}%{postfix_doc_dir}
mkdir -p %{buildroot}%{postfix_doc_dir}/examples{,/chroot-setup}
cp -pr examples/{qmail-local,smtpd-policy} %{buildroot}%{postfix_doc_dir}/examples
cp -p examples/chroot-setup/LINUX2 %{buildroot}%{postfix_doc_dir}/examples/chroot-setup

mv %{buildroot}/etc/postfix/bounce.cf.default %{buildroot}%{postfix_doc_dir}
mv %{buildroot}/etc/postfix/main.cf.default %{buildroot}%{postfix_doc_dir}
mv %{buildroot}/etc/postfix/makedefs.out %{buildroot}%{postfix_doc_dir}
rm -f %{buildroot}%{postfix_config_dir}/{TLS_,}LICENSE

find %{buildroot}%{postfix_doc_dir} -type f | xargs chmod 644
find %{buildroot}%{postfix_doc_dir} -type d | xargs chmod 755

#move man folder to the correct folder 
mv %{buildroot}/usr/local/man/ %{buildroot}/usr/share/man/

#install plogsumm
install -c -m 644 pflogsumm-%{pflogsumm_ver}/pflogsumm-faq.txt %{buildroot}%{postfix_doc_dir}/pflogsumm-faq.txt
install -c -m 644 pflogsumm-%{pflogsumm_ver}/pflogsumm.1 %{buildroot}%{_mandir}/man1/pflogsumm.1
install -c pflogsumm-%{pflogsumm_ver}/pflogsumm.pl %{buildroot}%{postfix_command_dir}/pflogsumm

mantools/srctoman - auxiliary/qshape/qshape.pl > qshape.1
install -c qshape.1 %{buildroot}%{_mandir}/man1/qshape.1
install -c auxiliary/qshape/qshape.pl %{buildroot}%{postfix_command_dir}/qshape

mkdir -p %{buildroot}/%{_unitdir}/
install -m 0644 %{SOURCE500} %{buildroot}/%{_unitdir}/
rm -f %{buildroot}%{postfix_config_dir}/aliases
rm -f %{buildroot}%{_sysconfdir}/pam.d/smtp
rm -f %{buildroot}%{_sysconfdir}/postfix/main.cf.proto
rm -f %{buildroot}%{_sysconfdir}/postfix/master.cf.proto

#move files to the correct folder
mv %{buildroot}%{_sysconfdir}/postfix/main.cf %{buildroot}%{postfix_daemon_dir}/main.cf
mv %{buildroot}%{_sysconfdir}/postfix/master.cf %{buildroot}%{postfix_daemon_dir}/master.cf
mv %{buildroot}%{_sysconfdir}/postfix/postfix-files %{buildroot}%{postfix_daemon_dir}/postfix-files

cat %{buildroot}%{postfix_daemon_dir}/postfix-files

%post
/usr/bin/systemctl --system daemon-reload 2> /dev/null > /dev/null
%{_sbindir}/postfix set-permissions upgrade-configuration daemon_directory=%{postfix_daemon_dir}
command_directory=%{postfix_command_dir} mail_owner=%{postfix_user} setgid_group=%{maildrop_group}
manpage_directory=%{_mandir} sample_directory=%{postfix_sample_dir} readme_directory=%{postfix_readme_dir} &> /dev/null
%{_bindir}/unlink /etc/alternatives/mta 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-aliasesman 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-mailq 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-mailqman 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-newaliases 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-newaliasesman 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-pam 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-rmail 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-sendmail 2> /dev/null
%{_bindir}/unlink /etc/alternatives/mta-sendmailman 2> /dev/null
exit 0

%pre
%{_sbindir}/groupadd -g %{maildrop_gid} -r %{maildrop_group} 2>/dev/null
%{_sbindir}/groupadd -g %{postfix_gid} -r %{postfix_group} 2>/dev/null
%{_sbindir}/groupadd -g 12 -r mail 2>/dev/null
%{_sbindir}/useradd -d %{postfix_queue_dir} -s /sbin/nologin -g %{postfix_group} -G mail -M -r -u %{postfix_uid} %{postfix_user} 2>/dev/null
%{postfix_user} 2> /dev/null
exit 0

%preun
if [ "$1" == 0 ]; then
 /usr/bin/systemctl --no-reload disable postfix.service 2> /dev/null > /dev/null
 /usr/bin/systemctl stop postfix.service 2> /dev/null > /dev/null
fi
exit 0

%files
%defattr(-, root, root)
%attr(0644, root, root) %{_unitdir}/postfix.service
%dir %attr(0755, root, root) %{postfix_config_dir}
%dir %attr(0755, root, root) %{postfix_daemon_dir}
%dir %attr(0755, root, root) %{postfix_queue_dir}
%dir %attr(0755, root, root) %{postfix_queue_dir}/pid
%dir %attr(0700, %{postfix_user}, root) %{postfix_data_dir}
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/active
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/bounce
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/corrupt
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/defer
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/deferred
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/flush
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/hold
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/incoming
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/saved
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/trace
%dir %attr(0730, %{postfix_user}, %{maildrop_group}) %{postfix_queue_dir}/maildrop
%dir %attr(0710, %{postfix_user}, %{maildrop_group}) %{postfix_queue_dir}/public
%dir %attr(0700, %{postfix_user}, root) %{postfix_queue_dir}/private
%attr(2755, root, %{maildrop_group}) %{postfix_command_dir}/postdrop
%attr(2755, root, %{maildrop_group}) %{postfix_command_dir}/postqueue
%attr(0755, root, root) %{postfix_command_dir}/sendmail
%attr(0755, root, root) %{postfix_command_dir}/postalias
%attr(0755, root, root) %{postfix_command_dir}/postcat
%attr(0755, root, root) %{postfix_command_dir}/postconf
%attr(0755, root, root) %{postfix_command_dir}/postfix
%attr(0755, root, root) %{postfix_command_dir}/postkick
%attr(0755, root, root) %{postfix_command_dir}/postlock
%attr(0755, root, root) %{postfix_command_dir}/postlog
%attr(0755, root, root) %{postfix_command_dir}/postmap
%attr(0755, root, root) %{postfix_command_dir}/postmulti
%attr(0755, root, root) %{postfix_command_dir}/postsuper
%attr(0755, root, root) %{postfix_command_dir}/qshape
%attr(0755, root, root) %{postfix_command_dir}/pflogsumm
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/access
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/canonical
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/generic
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/header_checks
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/relocated
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/transport
%attr(0644, root, root) %config(noreplace) %{postfix_config_dir}/virtual
%attr(0755, root, root) %{postfix_daemon_dir}/[^mp]*
%attr(0644, root, root) %{postfix_daemon_dir}/main.cf
%attr(0644, root, root) %{postfix_daemon_dir}/master.cf
%attr(0755, root, root) %{postfix_daemon_dir}/master
%attr(0755, root, root) %{postfix_daemon_dir}/pickup
%attr(0755, root, root) %{postfix_daemon_dir}/pipe
%attr(0755, root, root) %{postfix_daemon_dir}/post-install
%attr(0644, root, root) %{postfix_daemon_dir}/postfix-files
%attr(0755, root, root) %{postfix_daemon_dir}/postfix-script
%attr(0755, root, root) %{postfix_daemon_dir}/postfix-wrapper
%attr(0755, root, root) %{postfix_daemon_dir}/postmulti-script
%attr(0755, root, root) %{postfix_daemon_dir}/postscreen
%attr(0755, root, root) %{postfix_daemon_dir}/proxymap
%attr(0755, root, root) %{postfix_daemon_dir}/postfix-tls-script
%attr(0755, root, root) %{_bindir}/mailq
%attr(0755, root, root) %{_bindir}/newaliases
%attr(0755, root, root) %{_bindir}/rmail
%config(noreplace) %{_sysconfdir}/pam.d/smtp.postfix
/usr/libexec/postfix/postlogd

%files manpages
%defattr(-, root, root)
%{postfix_doc_dir}
%attr(0644, root, root) %{_mandir}/man1/*
%attr(0644, root, root) %{_mandir}/man5/*
%attr(0644, root, root) %{_mandir}/man8/*