Debugging the distcheck target

From OPeNDAP Documentation
Revision as of 16:25, 28 September 2017 by Jimg (talk | contribs)

Here are common issues that can arise when you first run make distcheck

1 A file or directory does not exist

Symptom: You run the build (e.g., make check) and everything's fine, but make distcheck fails because a file or directory was not present.
Try: In the code, look for places where you used the autotools variable @srcddir@ (or @top_srcdir@ or @abs_srcdir@ or @abs_top_srcdir@) to refer a file or directory that is generated. In a regular build (e.g., make check) that will work fine since the src and build directories are one and the same. With make distcheck, not so much since the build (the generated) files are in a different directory from the source. To fix this, use @builddir@ (or the obvious variant).

2 An autotest suite fails

Symptom: You run the build (e.g., make check) and the tests are fine, but with make distcheck all of the tests in an autotest test suite fail.
Try: First, cd to mycode-3.14.15/_build/... and run the tests using make check. Since you're reading this, they are probably failing. Look at how the test's script is actually run and run it using verbose mode. Example: ../../../hello_world/tests/hello_handlerTest -v. If it says:

Failed to initialize stand alone app
BES: fatal, cannot open BES configuration file /Users/jimg/src/opendap/hyrax_git/bes/bes-3.19.0/_build/hello_world/tests/bes.conf: No such file or directory.

Then here's how to fix the problem:

3 A directory with generated content is not cleaned

Symptom: The make distcheck target complains that a directory contains files after the various clean operations.
Try: Add the latent files to the DISTCLEANFILES variable of the Makefile.am. Use a shell pattern to remove all of the files in a directory when the directory itself should not be removed. For example, DISTCLEANFILES=atconfig cache/*

4 The build fails because it cannot clean .deps

Symptom: The build make distcheck target is failing and the output log contains a long list of files in a directory named .deps and ends in could not delete .deps.
Try: The problem is that a child Makefile.am uses the AUTOMAKE_OPTIONS subdir-objects and the code references source or object files using ../file.o or ../file.cc. This causes the directory to run rm -rf ../.deps .deps and then run rm -rf .deps in the parent. But since the child already removed the parent's .deps directory, make reports an error since the parent's .deps dir no longer exists. The fix is to remove the subdir-objects option. In general, this option should be used only when building a source file in a child directory and you want the resulting object file to be put in the child dir too, and not the CWD.