bug#51129: Check for gperf if running from git: this avoids breaking at runtime.

[Dr. Arne Babenhauserheide]

From 0b70a54dd7df0075c392067a7ce17d0f05a59adf Mon Sep 17 00:00:00 2001
From: Arne Babenhauserheide <arne_bab@web.de>
Date: Mon, 11 Oct 2021 07:33:23 +0200
Subject: [PATCH] autoconf: Check for gperf if running from git

this avoids breaking at runtime.
---
 configure.ac | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/configure.ac b/configure.ac
index a3cdaff78..5e1231a6e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -80,6 +80,15 @@ else
   fi
 fi
 
+# Check for gperf if running from git
+AC_MSG_CHECKING([Checking for gperf if built from git])
+if ! test -f ".tarball-version" && false; then
+  AC_CHECK_TOOL([GPERF], [gperf], [no])
+  if test x"$GPERF" = x"no"; then
+    AC_MSG_ERROR([Building from git requires gperf, but it could not be found. 
Please install gperf.])
+  fi
+fi
+
 gl_EARLY
 AC_PROG_CPP
 AC_PROG_SED
-- 
2.33.0

-- 
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