[groff] [PATCH] build: fix out-of-tree builds without dependency tracking

[Colin Watson]

The non-recursive-gnulib-prefix-hack module interacts poorly with
out-of-tree builds: if configure is run with
--disable-dependency-tracking, then nothing creates the out-of-tree
lib directory before running targets such as lib/alloca.h, and the
prefix hack isn't smart enough to insert a mkdir.  The simplest
workaround is to create the directory in configure.

* configure.ac: Create lib directory if needed.
---
 ChangeLog    | 13 +++++++++++++
 configure.ac |  8 ++++++++
 2 files changed, 21 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 94eaebc..6f996f1 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,18 @@
 2018-03-09  Colin Watson  <address@hidden>
 
+       build: fix out-of-tree builds without dependency tracking
+
+       The non-recursive-gnulib-prefix-hack module interacts poorly with
+       out-of-tree builds: if configure is run with
+       --disable-dependency-tracking, then nothing creates the out-of-tree
+       lib directory before running targets such as lib/alloca.h, and the
+       prefix hack isn't smart enough to insert a mkdir.  The simplest
+       workaround is to create the directory in configure.
+
+       * configure.ac: Create lib directory if needed.
+
+2018-03-09  Colin Watson  <address@hidden>
+
        man pages: fix incorrect cross-referenced section
 
        * man/roff.7.man (FILE NAME EXTENSIONS): Correct reference to
diff --git a/configure.ac b/configure.ac
index f3c4dd0..84953a3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -198,6 +198,14 @@ AM_CONDITIONAL([BUILD_OTHERDOC], [test -n 
"$make_otherdoc"])
 AM_CONDITIONAL([BUILD_EXAMPLES], [test -n "$make_examples"])
 AM_CONDITIONAL([INSTALL_SHIPPED_HTML], [test -n 
"$make_install_shipped_htmldoc"])
 
+# The non-recursive-gnulib-prefix-hack module interacts poorly with
+# out-of-tree builds: if configure is run with
+# --disable-dependency-tracking, then nothing creates the out-of-tree lib
+# directory before running targets such as lib/alloca.h, and the prefix hack
+# isn't smart enough to insert a mkdir.  The simplest workaround is to
+# create the directory here.
+AS_MKDIR_P([lib])
+
 AC_CONFIG_FILES([Makefile])
 AC_CONFIG_FILES([test-groff], [chmod +x test-groff])
 AC_OUTPUT
-- 
2.7.4