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POAutomake not including object files in built static library
 

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  1. POAutomake not including object files in built static library
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    <p>I currently have a largish project including multiple applications and am trying to build a static library along with one of my applications for inclusion in several of the other applications. </p> <p>I followed the tutorial provided at <a href="http://www.gnu.org/software/automake/manual/html_node/A-Library.html" rel="nofollow">http://www.gnu.org/software/automake/manual/html_node/A-Library.html</a> and have set up the appropriate Makefile.am as follows:</p> <pre><code>include Makefile.shared noinst_LIBRARIES = libas2transition.a bin_PROGRAMS = as2transition BUILT_SOURCES = \ TransitionFormatter.cpp libas2transition_a_SOURCES = TransitionFormatter.re2c \ TransitionPath.cpp \ Timestep.cpp \ Predicate.cpp \ StringUtils.cpp as2transition_SOURCES = \ main.cpp as2transition_LDADD = libas2transition.a </code></pre> <p>Makefile.shared contains shared configuration for all my subprojects and contains:</p> <pre><code>if DEBUG AM_CFLAGS = -g3 -O0 -DDEBUG AM_CXXFLAGS = -g3 -O0 -DDEBUG --std=c++0x else AM_CFLAGS = -O3 -DNDEBUG AM_CXXFLAGS = -O3 -DNDEBUG --std=c++0x endif if MAINTAINER_MODE if HAVE_RE2C .re2c.cpp: $(RE2C) -o $@ $^ else .re2c.cpp: @- echo "ERROR: Configured to build in maintainer mode but re2c is not installed on the computer." @- echo "ERROR: Modified re2c files cannot be compiled into the corresponding .cpp file." @- echo "ERROR: Please install re2c before continuing." @- exit 1 endif else .re2c.cpp: @- echo "WARNING: The system must be configured to build in maintainer mode in order to rebuild re2c files." @- echo "WARNING: These files will not be rebuilt unless you rerun the configure script with the '--enable-maintainer-mode' flag." endif </code></pre> <p>As far as I can tell everything is set up properly to first build the static library libas2transition.a and then compile a binary linking against it. However, when I attempt to run make I get the following output (note that this was a fresh build after a make clean).</p> <pre><code>make all-am make[1]: Entering directory `/home/jbabb1/workspace/as2transition/src' rm -f libas2transition.a ar cru libas2transition.a ranlib libas2transition.a g++ -DHAVE_CONFIG_H -I. -I.. -O3 -DNDEBUG --std=c++0x -g -O2 -MT main.o -MD -MP -MF .deps/main.Tpo -c -o main.o main.cpp mv -f .deps/main.Tpo .deps/main.Po g++ -O3 -DNDEBUG --std=c++0x -g -O2 -o as2transition main.o libas2transition.a main.o: In function `as2transition::TransitionFormatter::format(std::basic_istream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;, std::basic_ostream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;, bool) const': /home/jbabb1/workspace/as2transition/src/TransitionFormatter.h:123: undefined reference to `as2transition::TransitionFormatter::format(std::basic_istream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;, bool) const' /home/jbabb1/workspace/as2transition/src/TransitionFormatter.h:124: undefined reference to `as2transition::TransitionPath::output(std::basic_ostream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;) const' main.o: In function `main': /home/jbabb1/workspace/as2transition/src/main.cpp:136: undefined reference to `as2transition::TransitionFormatter::parseOption(char const*, bool)' /home/jbabb1/workspace/as2transition/src/main.cpp:193: undefined reference to `as2transition::TransitionFormatter::help(std::basic_ostream&lt;char, std::char_traits&lt;char&gt; &gt;&amp;, bool)' collect2: ld returned 1 exit status make[1]: *** [as2transition] Error 1 make[1]: Leaving directory `/home/jbabb1/workspace/as2transition/src' make: *** [all] Error 2 </code></pre> <p>The important lines seem to be </p> <pre><code>rm -f libas2transition.a ar cru libas2transition.a ranlib libas2transition.a </code></pre> <p>which seem indicate that Automake is not attaching any object files to the built library (this is further confirmed by the file size of libas2transition.a being 8 bytes following the compilation).</p> <p>What am I doing wrong? </p> <p>Also as a follow-up question, how would I make this library available to other projects in a larger build (which use nested configure.ac files).</p> <p>Thanks!</p>
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    1. USbabb517
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    1. COPut `TransitionFormatter.cpp` instead of `TransitionFormatter.re2c` in the `libas2transition_a_SOURCES` list.
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      1. POAutomake not including object files in built static library
      1. USWilliam Pursell
    2. CO@WilliamPursell The change doesn't appear to effect the end result, I'm still getting the same error. Thanks!
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      1. POAutomake not including object files in built static library
      1. USbabb517
    3. COI don't consider `AM_MAINTAINER_MODE` a good idea, and neither does its inventor: http://www.gnu.org/software/automake/manual/html_node/maintainer_002dmode.html
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      1. POAutomake not including object files in built static library
      1. USJack Kelly
 

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