gnome: Fix crash in gtkdoc and generate_gir in C++ projects

gtkdoc() and generate_gir() methods assumes there is a C compiler, but
pure C++ projects might not add it explicitly.

Fixes: #12162

5 files changed, 52 insertions, 0 deletions

diff --git a/test cases/frameworks/36 gtkdoc cpp/foo-docs.xml b/test cases/frameworks/36 gtkdoc cpp/foo-docs.xml
new file mode 100644
index 000000000..85c673c57
--- /dev/null
+++ b/test cases/frameworks/36 gtkdoc cpp/foo-docs.xml
@@ -0,0 +1,16 @@
+<?xml version="1.0"?>
+<!DOCTYPE book PUBLIC '-//OASIS//DTD DocBook XML V4.5//EN'
+                      'http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd' [
+<!ENTITY % local.common.attrib "xmlns:xi  CDATA  #FIXED 'http://www.w3.org/2003/XInclude'">
+<!ENTITY version SYSTEM "version.xml">
+]>
+<book id="index" xmlns:xi="http://www.w3.org/2003/XInclude">
+  <bookinfo>
+    <title>Foo Reference Manual</title>
+  </bookinfo>
+
+  <chapter id="foo">
+    <title>GLib Core Application Support</title>
+    <xi:include href="xml/foo.xml" />
+  </chapter>
+</book>
diff --git a/test cases/frameworks/36 gtkdoc cpp/foo.cpp b/test cases/frameworks/36 gtkdoc cpp/foo.cpp
new file mode 100644
index 000000000..15fa26980
--- /dev/null
+++ b/test cases/frameworks/36 gtkdoc cpp/foo.cpp
@@ -0,0 +1,5 @@
+#include "foo.h"
+
+int foo_do_something(void) {
+    return 42;
+}
diff --git a/test cases/frameworks/36 gtkdoc cpp/foo.h b/test cases/frameworks/36 gtkdoc cpp/foo.h
new file mode 100644
index 000000000..cac03d3c1
--- /dev/null
+++ b/test cases/frameworks/36 gtkdoc cpp/foo.h
@@ -0,0 +1 @@
+int foo_do_something(void);
diff --git a/test cases/frameworks/36 gtkdoc cpp/meson.build b/test cases/frameworks/36 gtkdoc cpp/meson.build
new file mode 100644
index 000000000..747eae546
--- /dev/null
+++ b/test cases/frameworks/36 gtkdoc cpp/meson.build
@@ -0,0 +1,13 @@
+project('gnome module without C', 'cpp')
+
+gtkdoc = find_program('gtkdoc-scan', required: false)
+if not gtkdoc.found()
+  error('MESON_SKIP_TEST gtkdoc not found.')
+endif
+
+gnome = import('gnome')
+
+lib = library('foo++', 'foo.cpp')
+gnome.gtkdoc('foo',
+  src_dir: '.',
+  main_xml : 'foo-docs.xml',)
diff --git a/test cases/frameworks/36 gtkdoc cpp/test.json b/test cases/frameworks/36 gtkdoc cpp/test.json
new file mode 100644
index 000000000..b2d9bc88f
--- /dev/null
+++ b/test cases/frameworks/36 gtkdoc cpp/test.json
@@ -0,0 +1,17 @@
+{
+  "installed": [
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/up-insensitive.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/home.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/foo.html"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/foo-foo.html"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/style.css"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/index.html"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/foo.devhelp2"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/left.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/left-insensitive.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/right-insensitive.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/up.png"},
+    {"type": "file", "file": "usr/share/gtk-doc/html/foo/right.png"}
+  ],
+  "skip_on_jobname": ["azure", "msys2"]
+}