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[PATCH] Make --enable-gdbm default to false, rather than default to true with an unavoidable warning.

As the subject says.  If it's something the user might not want to do,
make it opt-in.

Also, there was no way for a user who understood the implications to
turn off the warning.



 README       |  4 ++++
 configure.ac | 14 +++-----------
 2 files changed, 7 insertions(+), 11 deletions(-)

diff --git a/README b/README
index 5d9d9073a..5ae6087a2 100644
--- a/README
+++ b/README
@@ -33,6 +33,10 @@ details, see the documentation.
 Incompatibilities since 5.7.1
+Build-time change: The default value of the --enable-gdbm configure
+argument has changed from "yes" to "no".  Thus, the zsh/db/gdbm module will
+not be built unless --enable-gdbm is passed explicitly.
 The history expansion !:1:t2 used to be interpreted such that the 2
 was a separate character added after the history expansion.  Now
 it is an argument to the :t modifier.
diff --git a/configure.ac b/configure.ac
index 8fd4d452f..256584538 100644
--- a/configure.ac
+++ b/configure.ac
@@ -444,9 +444,10 @@ dnl Do you want to look for capability support?
 AS_HELP_STRING([--enable-cap],[enable the search for POSIX capabilities (may require additional headers to be added by hand)]))
+# Default off for licensing reasons
-AS_HELP_STRING([--disable-gdbm],[turn off search for gdbm library]),
-[gdbm="$enableval"], [gdbm=yes])
+AS_HELP_STRING([--enable-gdbm],[enable the search for the GDBM library (see the zsh/db/gdbm module)]),
+[gdbm="$enableval"], [gdbm=no])
 dnl ------------------
@@ -3298,13 +3299,4 @@ fi
 echo "See config.modules for installed modules and functions.
-case x$LIBS in
-  *-lgdbm*)
-  echo "WARNING: zsh will be linked against libgdbm.
-This means the binary is covered by the GNU General Public License.
-This does not affect the source code.
-Run configure with --disable-gdbm if required."
-  ;;
 exit 0

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