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[Xen-devel] [PATCH] tools/ocaml: Fix build error with Arch Linux



gcc (GCC) 9.2.0 complains:

xentoollog_stubs.c: In function ‘stub_xtl_ocaml_vmessage’:
xentoollog_stubs.c:93:16: error: initialization discards ‘const’ qualifier from 
pointer target type [-Werror=discarded-qualifiers]
   93 |  value *func = caml_named_value(xtl->vmessage_cb) ;
      |                ^~~~~~~~~~~~~~~~

Signed-off-by: Petre Pircalabu <ppircalabu@xxxxxxxxxxxxxxx>
---
 tools/ocaml/libs/xentoollog/xentoollog_stubs.c |  4 ++--
 tools/ocaml/libs/xl/xenlight_stubs.c           | 20 ++++++++++----------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/tools/ocaml/libs/xentoollog/xentoollog_stubs.c 
b/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
index aadc3d1..1f73f26 100644
--- a/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
+++ b/tools/ocaml/libs/xentoollog/xentoollog_stubs.c
@@ -90,7 +90,7 @@ static void stub_xtl_ocaml_vmessage(struct xentoollog_logger 
*logger,
        CAMLparam0();
        CAMLlocalN(args, 4);
        struct caml_xtl *xtl = (struct caml_xtl*)logger;
-       value *func = caml_named_value(xtl->vmessage_cb) ;
+       const value *func = caml_named_value(xtl->vmessage_cb) ;
        char *msg;
 
        if (func == NULL)
@@ -120,7 +120,7 @@ static void stub_xtl_ocaml_progress(struct 
xentoollog_logger *logger,
        CAMLparam0();
        CAMLlocalN(args, 5);
        struct caml_xtl *xtl = (struct caml_xtl*)logger;
-       value *func = caml_named_value(xtl->progress_cb) ;
+       const value *func = caml_named_value(xtl->progress_cb) ;
 
        if (func == NULL)
                caml_raise_sys_error(caml_copy_string("Unable to find 
callback"));
diff --git a/tools/ocaml/libs/xl/xenlight_stubs.c 
b/tools/ocaml/libs/xl/xenlight_stubs.c
index ff16b87..1181971 100644
--- a/tools/ocaml/libs/xl/xenlight_stubs.c
+++ b/tools/ocaml/libs/xl/xenlight_stubs.c
@@ -75,7 +75,7 @@ static void failwith_xl(int error, char *fname)
 {
        CAMLparam0();
        CAMLlocal1(arg);
-       static value *exc = NULL;
+       static const value *exc = NULL;
 
        /* First time around, lookup by name */
        if (!exc)
@@ -424,7 +424,7 @@ void async_callback(libxl_ctx *ctx, int rc, void 
*for_callback)
        caml_leave_blocking_section();
        CAMLparam0();
        CAMLlocal2(error, tmp);
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) for_callback;
 
        if (func == NULL) {
@@ -1133,7 +1133,7 @@ value stub_libxl_xen_console_read_start(value ctx, value 
clear)
 
 static void raise_eof(void)
 {
-       static value *exc = NULL;
+       static const value *exc = NULL;
 
        /* First time around, lookup by name */
        if (!exc)
@@ -1274,7 +1274,7 @@ int fd_register(void *user, int fd, void 
**for_app_registration_out,
        CAMLparam0();
        CAMLlocalN(args, 4);
        int ret = 0;
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) user;
        value *for_app;
 
@@ -1317,7 +1317,7 @@ int fd_modify(void *user, int fd, void 
**for_app_registration_update,
        CAMLparam0();
        CAMLlocalN(args, 4);
        int ret = 0;
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) user;
        value *for_app = *for_app_registration_update;
 
@@ -1356,7 +1356,7 @@ void fd_deregister(void *user, int fd, void 
*for_app_registration)
        caml_leave_blocking_section();
        CAMLparam0();
        CAMLlocalN(args, 3);
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) user;
        value *for_app = for_app_registration;
 
@@ -1398,7 +1398,7 @@ int timeout_register(void *user, void 
**for_app_registration_out,
        CAMLlocal2(sec, usec);
        CAMLlocalN(args, 4);
        int ret = 0;
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) user;
        struct timeout_handles *handles;
 
@@ -1450,7 +1450,7 @@ int timeout_modify(void *user, void 
**for_app_registration_update,
        CAMLlocal1(for_app_update);
        CAMLlocalN(args, 2);
        int ret = 0;
-       static value *func = NULL;
+       static const value *func = NULL;
        value *p = (value *) user;
        struct timeout_handles *handles = *for_app_registration_update;
 
@@ -1566,7 +1566,7 @@ void event_occurs(void *user, libxl_event *event)
        CAMLparam0();
        CAMLlocalN(args, 2);
        struct user_with_ctx *c_user = (struct user_with_ctx *) user;
-       static value *func = NULL;
+       static const value *func = NULL;
 
        if (func == NULL) {
                /* First time around, lookup by name */
@@ -1589,7 +1589,7 @@ void disaster(void *user, libxl_event_type type,
        CAMLparam0();
        CAMLlocalN(args, 4);
        struct user_with_ctx *c_user = (struct user_with_ctx *) user;
-       static value *func = NULL;
+       static const value *func = NULL;
 
        if (func == NULL) {
                /* First time around, lookup by name */
-- 
2.7.4


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