From: Emil Velikov <emil.l.velikov@gmail.com>
Date: Sun, 15 Sep 2024 18:04:19 +0000 (+0100)
Subject: meson: use has_header_symbol for checking declarations
X-Git-Tag: v34~337
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2396d385bbd86caaec1302f8ec69e746bd037c8;p=thirdparty%2Fkmod.git

meson: use has_header_symbol for checking declarations

Currently we use has_function, which will construct local declaration
and see if the program links successfully. What we're really interested
is if the referenced header has a declaration of the respective symbol.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Link: https://github.com/kmod-project/kmod/pull/131
Signed-off-by: Lucas De Marchi <lucas.de.marchi@gmail.com>
---

diff --git a/meson.build b/meson.build
index e543de44..047e9647 100644
--- a/meson.build
+++ b/meson.build
@@ -87,12 +87,12 @@ endforeach
 # basename may be only available in libgen.h with the POSIX behavior,
 # not desired here
 _decls = [
-  ['basename', '#include <string.h>'],
+  ['basename', 'string.h'],
 ]
 foreach tuple : _decls
   decl = tuple[0]
-  prefix = tuple[1]
-  have = cc.has_function(decl, prefix : prefix, args : '-D_GNU_SOURCE')
+  header = tuple[1]
+  glibc = cc.has_header_symbol(header, decl, args : '-D_GNU_SOURCE')
   cdata.set10('HAVE_DECL_@0@'.format(decl.to_upper()), have)
 endforeach