Potential bug in AC_CONFIG_SRCDIR

Greetings:

I am observing some strange behavior ( see comments in snippet ) with the AC_CONFIG_SRCDIR macro when using the configure.ac snippet below.

<Begin configure.ac snippet>

…

#Define a subdirectory which contains the source files ( a separate Git repo )
DCMSGSRCDIR=DockControllerImplv1_Messages_src
AC_SUBST([DCMSGSRCDIR], [$DCMSGSRCDIR])


#This works
# AC_CONFIG_SRCDIR([DockControllerImplv1_Messages_src/src/dockcontrollermsg.c])
# AC_CONFIG_SRCDIR([DockControllerImplv1_Messages_src/include/dockcontrollermsg.h])


#This also works
AC_CONFIG_SRCDIR([$DCMSGSRCDIR/src/dockcontrollermsg.c])
AC_CONFIG_SRCDIR([DockControllerImplv1_Messages_src/include/dockcontrollermsg.h])


# This ***does not*** work

# This second use of the variable doesn't work and fails with ‘configure: error: cannot find sources (/include/dockcontrollermsg.h) in . or ..’.

# Is this a bug?
AC_CONFIG_SRCDIR([$DCMSGSRCDIR/src/dockcontrollermsg.c])
AC_CONFIG_SRCDIR([$DCMSGSRCDIR/include/dockcontrollermsg.h])

…

<End configure.ac snippet>


Thank you,

Michael Cress



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