configure: add ${NOTMUCH_SRCDIR} -- absolute path to notmuch source

The ${srcdir} -- usually relative path to notmuch source -- works fine
in current ./configure and all makefiles. To have simple access to
notmuch source in tests and out of tree builds holding absolute path to
the source directory is useful.

diff --git a/configure b/configure
index e16a9b761e7257551b39f7f60455e9d2d374afe4..bcfa4167f3a84470986883218bc7630e9f36fc33 100755 (executable)
--- a/configure
+++ b/configure
@@ -19,7 +19,12 @@ To work around this problem you may try to execute:
 # Store original IFS value so it can be changed (and restored) in many places.
 readonly DEFAULT_IFS="$IFS"
 
+# The top-level directory for the source. This ./configure and all Makefiles
+# are good with ${srcdir} usually being relative. Some components (e.g. tests)
+# are executed in subdirectories and for those it is simpler to use
+# ${NOTMUCH_SRCDIR} which holds absolute path to the source.
 srcdir=$(dirname "$0")
+NOTMUCH_SRCDIR=$(cd "$srcdir" && pwd)
 
 subdirs="util compat lib parse-time-string completion doc emacs"
 subdirs="${subdirs} performance-test test test/test-databases"
@@ -913,6 +918,7 @@ cat > Makefile.config <<EOF
 # the configure script). This may be different than the build
 # directory (the current directory at the time configure was run).
 srcdir = ${srcdir}
+NOTMUCH_SRCDIR = ${NOTMUCH_SRCDIR}
 
 # subdirectories to build
 subdirs = ${subdirs}
@@ -1164,6 +1170,8 @@ cat > sh.config <<EOF
 # This sh.config was automatically generated by the ./configure
 # script of notmuch.
 
+NOTMUCH_SRCDIR='${NOTMUCH_SRCDIR}'
+
 # Whether the Xapian version in use supports compaction
 NOTMUCH_HAVE_XAPIAN_COMPACT=${have_xapian_compact}