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autoconf-2.68: no AC_LANG_SOURCE call detected in body
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From: |
Ralf Corsepius |
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Subject: |
autoconf-2.68: no AC_LANG_SOURCE call detected in body |
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Date: |
Thu, 23 Sep 2010 14:56:11 +0200 |
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User-agent: |
Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100907 Fedora/3.1.3-1.fc13 Thunderbird/3.1.3 |
Hi,
I am facing a new issue/regression with autoconf-2.68:
When running autoreconf on the follow configure.ac[1]
-- snip --
AC_INIT([foo],[0.1])
AC_CONFIG_SRCDIR([configure.ac])
AM_INIT_AUTOMAKE([foreign])
AC_COMPILE_IFELSE([
#ifndef FOO
choke me
#endif
])
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
-- snip --
autoconf-2.68 complains:
# autoreconf -fi
autoreconf -fi
configure.ac:6: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call
detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:6: the top level
configure.ac:6: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call
detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:6: the top level
configure.ac:6: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call
detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:6: the top level
configure.ac:6: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call
detected in body
../../lib/autoconf/lang.m4:194: AC_LANG_CONFTEST is expanded from...
../../lib/autoconf/general.m4:2591: _AC_COMPILE_IFELSE is expanded from...
../../lib/autoconf/general.m4:2607: AC_COMPILE_IFELSE is expanded from...
configure.ac:6: the top level
With older autoconfs, autoreconf remains entirely silent.
What is wrong with this configure.ac rsp. how to overcome these warnings?
Ralf
[1] I actually tripped this issue with a real world package.
The configure.ac above is a stripped version of a much more complex real
world configure script.