dev-lang/mono: fix modern C issue in configure

Signed-off-by: Sam James <sam@gentoo.org>

1 files changed, 51 insertions, 0 deletions

diff --git a/dev-lang/mono/files/mono-6.12.0.199-configure-c99.patch b/dev-lang/mono/files/mono-6.12.0.199-configure-c99.patch
new file mode 100644
index 000000000000..3018dbe8339c
--- /dev/null
+++ b/dev-lang/mono/files/mono-6.12.0.199-configure-c99.patch
@@ -0,0 +1,51 @@
+https://github.com/mono/mono/pull/21730
+
+From 90315aa24569d13da93230ac2d3e5ec3c96f35b4 Mon Sep 17 00:00:00 2001
+From: Florian Weimer <fweimer@redhat.com>
+Date: Sat, 9 Dec 2023 00:06:09 +0100
+Subject: [PATCH] configure: Fix type errors in __thread test
+
+The thread start routine must return void *, and int and void *
+are distinct types.  Compilers increasingly issue errors instead
+of warnings for such type errors, and this causes the configure
+probe to fail unconditionally, even if the system supports
+__thread variables.
+---
+ configure.ac | 10 +++++++---
+ 1 file changed, 7 insertions(+), 3 deletions(-)
+
+diff --git a/configure.ac b/configure.ac
+index dbc4904d9b2e4..7518439118e37 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -2831,14 +2831,16 @@ if test x$host_win32 = xno; then
+ 			__thread int i;
+ 			static int res1, res2;
+ 
+-			void thread_main (void *arg)
++			void *thread_main (void *parg)
+ 			{
++				int arg = *(int *)parg;
+ 				i = arg;
+ 				sleep (1);
+ 				if (arg == 1)
+ 					res1 = (i == arg);
+ 				else
+ 					res2 = (i == arg);
++				return NULL;
+ 			}
+ 
+ 			int main () {
+@@ -2846,8 +2848,10 @@ if test x$host_win32 = xno; then
+ 
+ 				i = 5;
+ 
+-				pthread_create (&t1, NULL, thread_main, 1);
+-				pthread_create (&t2, NULL, thread_main, 2);
++				int one = 1;
++				pthread_create (&t1, NULL, thread_main, &one);
++				int two = 2;
++				pthread_create (&t2, NULL, thread_main, &two);
+ 
+ 				pthread_join (t1, NULL);
+ 				pthread_join (t2, NULL);