From: Tobias Brunner <tobias@strongswan.org>
Date: Thu, 5 Dec 2019 14:46:15 +0000 (+0100)
Subject: configure: Abort if gperf is not found but generated files don't exist
X-Git-Tag: 5.8.2rc1~2
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=72373d940a7ff615346d5b03cff116f421c47638;p=thirdparty%2Fstrongswan.git

configure: Abort if gperf is not found but generated files don't exist

When building from a tarball gperf is not required as the generated
files already exist, however, when building from the repository that's
not the case, so warn the user if gperf is not found.
---

diff --git a/configure.ac b/configure.ac
index 329739d8d8..83918ad3e0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -378,7 +378,7 @@ AC_ARG_VAR([PERL], [the Perl interpreter])
 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 just report it but do not abort on failure
+# 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])
 if test -x "$GPERF"; then
 	if test "`$GPERF --version | $AWK -F' ' '/^GNU gperf/ { print $3 }' | $AWK -F. '{ print $1 }'`" -ge "3"; then
@@ -403,6 +403,10 @@ if test -x "$GPERF"; then
 	fi
 else
 	AC_MSG_RESULT([not found])
+	GPERF_TEST_FILE="$srcdir/src/libstrongswan/crypto/proposal/proposal_keywords_static.c"
+	if test ! -f "$GPERF_TEST_FILE"; then
+		AC_MSG_ERROR([GNU gperf required to generate e.g. $GPERF_TEST_FILE])
+	fi
 fi
 
 # ========================