doc: fix generation of API indices

The index id is expected to be "api-index-*" not just "index-*", and for
some reason newer versions of gtk-doc don’t like these "role" attributes
and will not generate the index if they are present. Also add missing
indices for 1.0 and 1.18.

1 files changed, 15 insertions, 9 deletions

diff --git a/doc/public/cairo-docs.xml b/doc/public/cairo-docs.xml
index b5afa1b90..0a0e462f9 100644
--- a/doc/public/cairo-docs.xml
+++ b/doc/public/cairo-docs.xml
@@ -56,32 +56,38 @@
     <xi:include href="xml/cairo-version.xml"/>
     <xi:include href="xml/cairo-types.xml"/>
   </chapter>
-  <index id="index-all">
+  <index id="api-index-all">
     <title>Index</title>
   </index>
-  <index id="index-1.2" role="1.2">
+  <index id="api-index-1.0">
+    <title>Index of new symbols in 1.0</title>
+  </index>
+  <index id="api-index-1.2">
     <title>Index of new symbols in 1.2</title>
   </index>
-  <index id="index-1.4" role="1.4">
+  <index id="api-index-1.4">
     <title>Index of new symbols in 1.4</title>
   </index>
-  <index id="index-1.6" role="1.6">
+  <index id="api-index-1.6">
     <title>Index of new symbols in 1.6</title>
   </index>
-  <index id="index-1.8" role="1.8">
+  <index id="api-index-1.8">
     <title>Index of new symbols in 1.8</title>
   </index>
-  <index id="index-1.10" role="1.10">
+  <index id="api-index-1.10">
     <title>Index of new symbols in 1.10</title>
   </index>
-  <index id="index-1.12" role="1.12">
+  <index id="api-index-1.12">
     <title>Index of new symbols in 1.12</title>
   </index>
-  <index id="index-1.14" role="1.14">
+  <index id="api-index-1.14">
     <title>Index of new symbols in 1.14</title>
   </index>
-  <index id="index-1.16" role="1.16">
+  <index id="api-index-1.16">
     <title>Index of new symbols in 1.16</title>
   </index>
+  <index id="api-index-1.18">
+    <title>Index of new symbols in 1.18</title>
+  </index>
   <xi:include href="language-bindings.xml"/>
 </book>