Include stddef.h for size_t

And add the minimal build tests to make sure we build and link

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

meson.build

@@ -208,4 +208,27 @@ else
     message('valgrind not found, disabling valgrind test suite')
 endif
 
+
+# build-test only
+executable('test-build-libei',
+	   'test/buildtest.c',
+	   dependencies : [dep_libei],
+	   include_directories : 'src',
+	   c_args : ['-Werror', '-DINCLUDE_LIBEI=1'],
+	   install : false)
+
+executable('test-build-libeis',
+	   'test/buildtest.c',
+	   dependencies : [dep_libeis],
+	   include_directories : 'src',
+	   c_args : ['-Werror', '-DINCLUDE_LIBEIS=1'],
+	   install : false)
+
+executable('test-build-libreis',
+	   'test/buildtest.c',
+	   dependencies : [dep_libreis],
+	   include_directories : 'src',
+	   c_args : ['-Werror', '-DINCLUDE_LIBREIS=1'],
+	   install : false)
+
 configure_file(output: 'config.h', configuration: config_h)

src/libei.h

@@ -25,6 +25,7 @@
 
 #include <stdbool.h>
 #include <stdint.h>
+#include <stddef.h>
 
 struct ei;
 struct ei_device;

test/buildtest.c

@@ -0,0 +1,15 @@
+#if INCLUDE_LIBEI
+#include <libei.h>
+#endif
+
+#if INCLUDE_LIBEIS
+#include <libeis.h>
+#endif
+
+#if INCLUDE_LIBREIS
+#include <libreis.h>
+#endif
+
+int main(int argc, char **argv) {
+	return 0;
+}