From 3d40bf64919f3e7b95bd0067b1fe8315a6847bce Mon Sep 17 00:00:00 2001
From: Tobias Brunner <tobias@strongswan.org>
Date: Thu, 5 Dec 2019 15:50:12 +0100
Subject: [PATCH] configure: Drop unnecessary gperf version check

While the check probably made sense when strongSwan 4.x was started, gperf
version 3.0.1 was released in 2003, so it's very unlikely that version 2.x
is still around anywhere.
---
 configure.ac | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/configure.ac b/configure.ac
index 83918ad3e..813fcd923 100644
--- a/configure.ac
+++ b/configure.ac
@@ -379,28 +379,24 @@ AC_PATH_PROG([GPERF], [gperf], [], [$PATH:/bin:/usr/bin:/usr/local/bin])
 AC_ARG_VAR([GPERF], [the GNU gperf program])
 
 # because gperf is not needed by end-users we only abort if generated files don't exist
-AC_MSG_CHECKING([gperf version >= 3.0.0])
+AC_MSG_CHECKING([gperf len type])
 if test -x "$GPERF"; then
-	if test "`$GPERF --version | $AWK -F' ' '/^GNU gperf/ { print $3 }' | $AWK -F. '{ print $1 }'`" -ge "3"; then
-		GPERF_OUTPUT="`echo foo | ${GPERF}`"
-		AC_COMPILE_IFELSE(
+	GPERF_OUTPUT="`echo foo | ${GPERF}`"
+	AC_COMPILE_IFELSE(
+		[AC_LANG_PROGRAM(
+			[[#include <string.h>
+			  const char *in_word_set(const char*, size_t); $GPERF_OUTPUT]])],
+		[GPERF_LEN_TYPE=size_t],
+		[AC_COMPILE_IFELSE(
 			[AC_LANG_PROGRAM(
 				[[#include <string.h>
-				  const char *in_word_set(const char*, size_t); $GPERF_OUTPUT]])],
-			[GPERF_LEN_TYPE=size_t],
-			[AC_COMPILE_IFELSE(
-				[AC_LANG_PROGRAM(
-					[[#include <string.h>
-					  const char *in_word_set(const char*, unsigned); $GPERF_OUTPUT]])],
-				[GPERF_LEN_TYPE=unsigned],
-				[AC_MSG_ERROR([unable to determine gperf len type])]
-			)]
-		)
-		AC_SUBST(GPERF_LEN_TYPE)
-		AC_MSG_RESULT([yes])
-	else
-		AC_MSG_RESULT([no])
-	fi
+				  const char *in_word_set(const char*, unsigned); $GPERF_OUTPUT]])],
+			[GPERF_LEN_TYPE=unsigned],
+			[AC_MSG_ERROR([unable to determine gperf len type])]
+		)]
+	)
+	AC_SUBST(GPERF_LEN_TYPE)
+	AC_MSG_RESULT([$GPERF_LEN_TYPE])
 else
 	AC_MSG_RESULT([not found])
 	GPERF_TEST_FILE="$srcdir/src/libstrongswan/crypto/proposal/proposal_keywords_static.c"