diff --git a/twlog-configure-c99.patch b/twlog-configure-c99.patch
new file mode 100644
index 0000000..4873749
--- /dev/null
+++ b/twlog-configure-c99.patch
@@ -0,0 +1,33 @@
+Avoid an undeclared exit function calls in configure checks.
+This improves compatibility with strict(er) C99 compilers, which may
+not support implicit function declarations because they were removed
+from the C language in 1999.
+
+One issues would be fixed by regeneration of configure with new autotools.
+Other requires change to acinclude.m4 and then regeneration. Now response
+from upstream maintainer.
+
+Issue tracked here: https://bugzilla.redhat.com/show_bug.cgi?id=2151046
+
+diff --git a/configure b/configure
+index 772cb27..a356ee6 100755
+--- a/configure
++++ b/configure
+@@ -5442,7 +5442,7 @@ Display *display=NULL;
+ short   major_version, minor_version;
+ Status rc;
+ rc=XpQueryVersion(display, &major_version, &minor_version);
+-exit(0);
++return 0;
+ }
+ 
+   ;
+@@ -5690,7 +5690,7 @@ Display *display=NULL;
+ short   major_version, minor_version;
+ Status rc;
+ rc=XpQueryVersion(display, &major_version, &minor_version);
+-exit(0);
++return 0;
+ }
+ 
+   ;
diff --git a/twlog.spec b/twlog.spec
index fa714db..306dfcd 100644
--- a/twlog.spec
+++ b/twlog.spec
@@ -3,9 +3,10 @@
 
 Name:		twlog
 Version:	3.4
-Release:	2%{?dist}
+Release:	14%{?dist}
 Summary:	Records basic ham radio log information
-License:	GPLv2+
+# Automatically converted from old format: GPLv2+ - review is highly recommended.
+License:	GPL-2.0-or-later
 
 URL:		http://wa0eir.bcts.info/twlog.html
 
@@ -15,10 +16,12 @@ Source1:	%{name}.sh.in
 
 # .desktop patch
 Patch0:		%{name}-%{version}.desktop.patch
+Patch1:		twlog-configure-c99.patch
 
-BuildRequires:  gcc
-BuildRequires:	xbae-devel
 BuildRequires:	desktop-file-utils
+BuildRequires:  gcc
+BuildRequires:  make
+BuildRequires:	xbae-devel
 
 %description
 Twlog records basic Ham log information. It was written
@@ -71,6 +74,42 @@ install -p -D -m 0644 ./src/Twlog %{buildroot}/%{_datadir}/X11/app-defaults/Twlo
 %{_mandir}/man1/%{name}.1*
 
 %changelog
+* Fri Jul 25 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-14
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_43_Mass_Rebuild
+
+* Sun Jan 19 2025 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-13
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_42_Mass_Rebuild
+
+* Fri Jul 26 2024 Miroslav Suchý <msuchy@redhat.com> - 3.4-12
+- convert license to SPDX
+
+* Sat Jul 20 2024 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-11
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild
+
+* Sat Jan 27 2024 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-10
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild
+
+* Sat Jul 22 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-9
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild
+
+* Sat Jan 21 2023 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-8
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_38_Mass_Rebuild
+
+* Tue Dec 06 2022 Peter Fordham <peter.fordham@gmail.com> - 3.4-7
+- Port configure script to C99
+
+* Sat Jul 23 2022 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-6
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_37_Mass_Rebuild
+
+* Sat Jan 22 2022 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-5
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_36_Mass_Rebuild
+
+* Fri Jul 23 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-4
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_35_Mass_Rebuild
+
+* Wed Jan 27 2021 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-3
+- Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass_Rebuild
+
 * Wed Jul 29 2020 Fedora Release Engineering <releng@fedoraproject.org> - 3.4-2
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass_Rebuild