Fix build when char and signed char differ

https://gitlab.gnome.org/GNOME/gjs/-/merge_requests/825

gjs-1.75.2-signed-char.patch

@@ -0,0 +1,65 @@
+From 3dce1d6b1885f326c55aed9e1d401ac79801396a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
+Date: Thu, 23 Feb 2023 21:46:59 +0100
+Subject: [PATCH 1/2] value: Use a signed char to old g_value_get_schar result
+
+char and signed char are the same in most of platforms, but that's not
+always true such as in arm64, s390x, ppc64el and others.
+
+See: https://buildd.debian.org/status/fetch.php?pkg=gjs&arch=arm64&ver=1.75.2-1&stamp=1676991213&raw=0
+
+Closes: #529
+---
+ gi/value.cpp | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/gi/value.cpp b/gi/value.cpp
+index 2e2f49aa2..651c21ad3 100644
+--- a/gi/value.cpp
++++ b/gi/value.cpp
+@@ -881,7 +881,7 @@ gjs_value_from_g_value_internal(JSContext             *context,
+                 return false;
+         }
+     } else if (gtype == G_TYPE_CHAR) {
+-        char v;
++        signed char v;
+         v = g_value_get_schar(gvalue);
+         value_p.setInt32(v);
+     } else if (gtype == G_TYPE_UCHAR) {
+-- 
+GitLab
+
+
+From 86a66ea412a725caa59d9fa41ea333117406768e Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Marco=20Trevisan=20=28Trevi=C3=B1o=29?= <mail@3v1n0.net>
+Date: Thu, 23 Feb 2023 21:53:16 +0100
+Subject: [PATCH 2/2] gi/value: Cleanup schar setting code
+
+We still need to use an int32 to hold its result (as that's where a
+signed char is stored in JS), but if the conversion is fine we need to
+cast its value to signed char. Do it using C++ style now though.
+---
+ gi/value.cpp | 4 ++--
+ 1 file changed, 2 insertions(+), 2 deletions(-)
+
+diff --git a/gi/value.cpp b/gi/value.cpp
+index 651c21ad3..17db002f6 100644
+--- a/gi/value.cpp
++++ b/gi/value.cpp
+@@ -458,11 +458,11 @@ gjs_value_to_g_value_internal(JSContext      *context,
+             return throw_expect_type(context, value, "string");
+         }
+     } else if (gtype == G_TYPE_CHAR) {
+-        gint32 i;
++        int32_t i;
+         if (Gjs::js_value_to_c_checked<signed char>(context, value, &i,
+                                                     &out_of_range) &&
+             !out_of_range) {
+-            g_value_set_schar(gvalue, (signed char)i);
++            g_value_set_schar(gvalue, static_cast<signed char>(i));
+         } else {
+             return throw_expect_type(context, value, "char", 0, out_of_range);
+         }
+-- 
+GitLab
+

gjs.spec

@@ -14,6 +14,8 @@ Summary:        Javascript Bindings for GNOME
 License:        MIT and (MPLv1.1 or GPLv2+ or LGPLv2+)
 URL:            https://wiki.gnome.org/Projects/Gjs
 Source0:        https://download.gnome.org/sources/%{name}/1.75/%{name}-%{version}.tar.xz
+# https://gitlab.gnome.org/GNOME/gjs/-/merge_requests/825
+Patch0:         gjs-1.75.2-signed-char.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  meson