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Use automake 'subdir-objects' option

Newer automake versions complain if we use source files in subdirectories:

autoreconf: running: automake --add-missing --copy --force-missing
plugins/omelasticsearch/Makefile.am:4: warning: source file 'cJSON/cjson.c' is in a subdirectory,
plugins/omelasticsearch/Makefile.am:4: but option 'subdir-objects' is disabled
automake: warning: possible forward-incompatibility.
automake: At least a source file is in a subdirectory, but the 'subdir-objects'
automake: automake option hasn't been enabled.  For now, the corresponding output
automake: object file(s) will be placed in the top-level directory.  However,
automake: this behaviour will change in future Automake versions: they will
automake: unconditionally cause object files to be placed in the same subdirectory
automake: of the corresponding sources.
automake: You are advised to start using 'subdir-objects' option throughout your
automake: project, to avoid future incompatibilities.
runtime/Makefile.am:7: warning: source file '../action.c' is in a subdirectory,
runtime/Makefile.am:7: but option 'subdir-objects' is disabled
runtime/Makefile.am:7: warning: source file '../threads.c' is in a subdirectory,
runtime/Makefile.am:7: but option 'subdir-objects' is disabled
runtime/Makefile.am:7: warning: source file '../parse.c' is in a subdirectory,
runtime/Makefile.am:7: but option 'subdir-objects' is disabled
runtime/Makefile.am:7: warning: source file '../outchannel.c' is in a subdirectory,
runtime/Makefile.am:7: but option 'subdir-objects' is disabled
runtime/Makefile.am:7: warning: source file '../template.c' is in a subdirectory,
runtime/Makefile.am:7: but option 'subdir-objects' is disabled
autoreconf: Leaving directory `.'

Explicitly set the 'subdir-objects' option to avoid any future issues.

Fixes rsyslog#33
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mbiebl committed Feb 15, 2014
1 parent 9962081 commit ce56d81efdcfd65b8fb2e90e66c8dae0a05cc659
Showing with 1 addition and 1 deletion.
  1. +1 −1 configure.ac
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@@ -3,7 +3,7 @@
AC_PREREQ(2.61)
AC_INIT([rsyslog],[7.6.0],[rsyslog@lists.adiscon.com])
AM_INIT_AUTOMAKE
AM_INIT_AUTOMAKE([subdir-objects])
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])

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