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bug#18075: AM_INIT_AUTOMAKE followed by comment
From: |
Scott Pakin |
Subject: |
bug#18075: AM_INIT_AUTOMAKE followed by comment |
Date: |
Mon, 21 Jul 2014 15:39:13 -0600 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0 |
The definition of AM_INIT_AUTOMAKE does not end in a newline
character, which can cause tricky-to-track errors if the call is
followed by an M4 comment. I believe this is new behavior because an
old set of Autotools configuration files that used to work failed when
I recently re-ran automake.
I'm running Ubuntu Trusty Tahr (14.04 LTS) with the following Automake
and Autoconf versions:
$ automake --version | head -1
automake (GNU automake) 1.14.1
$ autoconf --version | head -1
autoconf (GNU Autoconf) 2.69
I've attached a minimal reproducer, a configure.ac file with only the
following contents:
AC_INIT([badness], [1.0], address@hidden, [badness])
AM_INIT_AUTOMAKE([1.14])dnl This comment causes configure to break.
AC_CONFIG_FILES([Makefile])
AC_OUTPUT
Here's how to produce the error:
$ touch Makefile.am
$ aclocal
$ automake --add-missing --foreign
configure.ac:2: installing './install-sh'
configure.ac:2: installing './missing'
$ autoconf
$ ./configure
checking for a BSD-compatible install... /usr/bin/install -c
checking whether build environment is sane... yes
checking for a thread-safe mkdir -p... /bin/mkdir -p
checking for gawk... gawk
checking whether make sets $(MAKE)... yes
checking whether make supports nested variables... yes
./configure: line 3493: syntax error: unexpected end of file
The error is caused by line 2313, which contains
fiac_config_files="$ac_config_files Makefile"
instead of
fi
ac_config_files="$ac_config_files Makefile"
That is, bash is in fact complaining about a missing "fi".
Removing the comment from configure.ac or moving it onto a line of its
own works around the problem, but I think it would be nicer if init.m4
replaced the final "fi])" (right after the "Your 'rm' program is bad"
message) with
fi
])
Hopefully, that'll save someone else the effort of associating an "end
of file" error with a comment appearing in the wrong place.
Thanks for your time,
-- Scott
configure.ac
Description: Text document
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