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From: Luotao Fu <l.fu@pengutronix.de>
Date: Thu, 23 Apr 2009 15:15:21 +0200
Subject: [PATCH] Fix autotool bug
Original by Richard Hansen:
Autoconf has a longstanding bug in AC_REQUIRE that causes out-of-order
macro expansion problems. This patch works around the Autoconf bug.
lfu:
This one fixes the configure script fails if run with --disable-python.
Some macro needed by dependency tracker is errorneously expanded inside the
python check condition, which cause that these will be failed to be set if
python is not enabled.
Signed-off-by: FIXME
---
# 20110222 wsa: fixed in master meanwhile
configure.ac | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/configure.ac b/configure.ac
index 7db2a6c..67e9253 100644
--- a/configure.ac
+++ b/configure.ac
@@ -5,6 +5,27 @@ dnl AC_PREFIX_PROGRAM(gcc)
AM_CONFIG_HEADER(gpsd_config.h)
AC_LANG([C])
+# ACREQUIRE_BUGFIX
+# ----------------
+# Due to a longstanding Autoconf bug (Autoconf 2.50 to at least 2.63),
+# any macro that is AC_REQUIREd at any point must be AC_REQUIREd
+# *before* it is directly expanded. The macros below were being
+# directly expanded before being AC_REQUIREd, so we AC_REQUIRE them
+# early to prevent out-of-order expansion problems. See the threads
+# at:
+# http://lists.gnu.org/archive/html/bug-autoconf/2008-12/msg00039.html
+# http://lists.gnu.org/archive/html/autoconf-patches/2008-12/msg00058.html
+# http://lists.gnu.org/archive/html/bug-autoconf/2009-01/msg00019.html
+# http://lists.gnu.org/archive/html/bug-gnulib/2009-01/msg00247.html
+AC_DEFUN_ONCE([ACREQUIRE_BUGFIX],
+[
+ AC_REQUIRE([AC_PROG_CPP])
+ AC_REQUIRE([AC_PROG_EGREP])
+ AC_REQUIRE([AC_PROG_CC])
+])
+ACREQUIRE_BUGFIX
+# ACREQUIRE_BUGFIX done
+
AC_ARG_ENABLE(python,
AC_HELP_STRING([--disable-python],
[disable python scripts and library bindings]),
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