Add BUILD_DATE patch

- Add upstream patch:
  rrdtool-1.8.0-BUILD_DATE-fix.patch
- Fixes null in the output of the build time:
  rrdtool
  RRDtool 1.8.0  Copyright by Tobias Oetiker <tobi@oetiker.ch>
                 Compiled 22 Mar 2022 00:00:00 (null)

rrdtool-1.8.0-BUILD_DATE-fix.patch

@@ -0,0 +1,53 @@
+From e59f703bbcc0af949ee365206426b6394c340c6f Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Wolfgang=20St=C3=B6ggl?= <c72578@yahoo.de>
+Date: Wed, 23 Mar 2022 17:58:45 +0100
+Subject: [PATCH] Fix BUILD_DATE in rrdtool help output
+
+- This is a followup to #1102
+- Fixes segfault when running "rrdtool --help"
+- Change DATE_FMT to the same date format as the __DATE__ macro [1]:
+  mmm dd yyyy
+
+[1] https://gcc.gnu.org/onlinedocs/cpp/Standard-Predefined-Macros.html
+---
+ configure.ac   | 2 +-
+ src/rrd_tool.c | 8 ++++++++
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/configure.ac b/configure.ac
+index 4d234585..5169b0d4 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -695,7 +695,7 @@ AC_MSG_RESULT(${COMP_PERL:-No Perl Modules will be built})
+ 
+ # Use reproducible build date and time
+ if test "$SOURCE_DATE_EPOCH"; then
+-	DATE_FMT="%d %b %Y %H:%M:%S"
++	DATE_FMT="%b %d %Y %H:%M:%S"
+ 	BUILD_DATE=$(LC_ALL=C date -u -d "@$SOURCE_DATE_EPOCH" "+$DATE_FMT")
+ 	AC_DEFINE_UNQUOTED([BUILD_DATE], ["$BUILD_DATE"], [Use reproducible build date])
+ fi
+diff --git a/src/rrd_tool.c b/src/rrd_tool.c
+index 930d0827..cc6119d9 100644
+--- a/src/rrd_tool.c
++++ b/src/rrd_tool.c
+@@ -45,11 +45,19 @@ static void PrintUsage(
+     char *cmd)
+ {
+ 
++#ifdef BUILD_DATE
++    const char *help_main =
++        N_("RRDtool %s"
++           "  Copyright by Tobias Oetiker <tobi@oetiker.ch>\n"
++           "               Compiled %s\n\n"
++           "Usage: rrdtool [options] command command_options\n");
++#else
+     const char *help_main =
+         N_("RRDtool %s"
+            "  Copyright by Tobias Oetiker <tobi@oetiker.ch>\n"
+            "               Compiled %s %s\n\n"
+            "Usage: rrdtool [options] command command_options\n");
++#endif
+ 
+     const char *help_list =
+         N_

rrdtool.spec

@@ -18,7 +18,7 @@
 Summary: Round Robin Database Tool to store and display time-series data
 Name: rrdtool
 Version: 1.8.0
-Release: 5%{?dist}
+Release: 6%{?dist}
 License: GPLv2+ with exceptions
 URL: https://oss.oetiker.ch/rrdtool/
 Source0: https://github.com/oetiker/rrdtool-1.x/releases/download/v%{version}/%{name}-%{version}.tar.gz
@@ -29,6 +29,9 @@ Patch2: rrdtool-1.4.7-php55.patch
 Patch3: rrdtool-1.6.0-ruby-2-fix.patch
 # enable php bindings on ppc
 Patch4: rrdtool-1.4.8-php-ppc-fix.patch
+# Fix BUILD_DATE in rrdtool help output
+# https://github.com/oetiker/rrdtool-1.x/commit/e59f703
+Patch5: rrdtool-1.8.0-BUILD_DATE-fix.patch
 
 BuildRequires: make
 BuildRequires: gcc-c++
@@ -177,6 +180,7 @@ The %{name}-lua package includes RRDtool bindings for Lua.
 %patch3 -p1 -b .ruby-2-fix
 %endif
 %patch4 -p1 -b .php-ppc-fix
+%patch5 -p1 -b .BUILD_DATE-fix
 
 # Fix to find correct python dir on lib64
 perl -pi -e 's|get_python_lib\(0,0,prefix|get_python_lib\(1,0,prefix|g' \
@@ -405,6 +409,10 @@ LD_LIBRARY_PATH=%{buildroot}%{_libdir} php -n \
 %endif
 
 %changelog
+* Fri Dec 02 2022 Wolfgang Stöggl <c72578@yahoo.de> - 1.8.0-6
+- Fix BUILD_DATE
+  Add patch: rrdtool-1.8.0-BUILD_DATE-fix.patch
+
 * Thu Nov 24 2022 FeRD (Frank Dana) <ferdnyc@gmail.com> - 1.8.0-5
 - Remove excludes for nonexistent .la files
 - Fix Ruby directory lookup