[gspell] build: fix gtk-doc build issue

[Sébastien Wilmet <swilmet src gnome org>]

commit 6a01d1da0dd5fd957fda0d9be46c59bb1fda6b24
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sat May 14 14:24:43 2016 +0200

    build: fix gtk-doc build issue
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766400

 configure.ac                                       |    6 +++++-
 docs/reference/Makefile.am                         |   14 ++------------
 ...ell-sections.txt.in => gspell-1.0-sections.txt} |    0
 3 files changed, 7 insertions(+), 13 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 4169f14..55ff1a6 100644
--- a/configure.ac
+++ b/configure.ac
@@ -41,7 +41,11 @@ GSPELL_LT_VERSION="$GSPELL_LT_CURRENT:$GSPELL_LT_REVISION:$GSPELL_LT_AGE"
 AC_SUBST(GSPELL_LT_VERSION)
 
 # API version, used for parallel installability.
-# Not used in po/, it causes a builddir != srcdir build issue.
+# Not used in:
+# - po/Makevars
+# - the docs/reference/gspell-1.0-sections.txt filename
+# Because as far as I've tested, it is not easily feasible to not hardcode the
+# API version in those places (swilmet).
 GSPELL_API_VERSION=1
 AC_SUBST(GSPELL_API_VERSION)
 
diff --git a/docs/reference/Makefile.am b/docs/reference/Makefile.am
index a2b18b5..97efc7a 100644
--- a/docs/reference/Makefile.am
+++ b/docs/reference/Makefile.am
@@ -62,17 +62,7 @@ MAINTAINERCLEANFILES =                       \
 # include common portion ...
 include $(top_srcdir)/gtk-doc.make
 
-# gtk-doc.make has already a recipe for the $(DOC_MODULE)-sections.txt target.
-# So override it here.
-$(builddir)/$(DOC_MODULE)-sections.txt: Makefile $(srcdir)/gspell-sections.txt.in
-       $(AM_V_GEN) cp $(srcdir)/gspell-sections.txt.in $@
-
-EXTRA_DIST +=                  \
-       gspell-docs.xml.in      \
-       gspell-sections.txt.in
-
-DISTCLEANFILES =                                       \
-       gspell-docs.xml                                 \
-       gspell- GSPELL_API_VERSION@.0-sections.txt
+EXTRA_DIST += gspell-docs.xml.in
+DISTCLEANFILES = gspell-docs.xml
 
 -include $(top_srcdir)/git.mk
diff --git a/docs/reference/gspell-sections.txt.in b/docs/reference/gspell-1.0-sections.txt
similarity index 100%
rename from docs/reference/gspell-sections.txt.in
rename to docs/reference/gspell-1.0-sections.txt