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.

diff --git a/configure.ac b/configure.ac
index 83918ad3e0529db1a5bc60f64e2cee127c3cdbcc..813fcd923834964b367d8f0fa7e953a6b435c56a 100644 (file)
--- 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"