[PATCH 1/2] i386: Fix const qualifier build errors with recent glibc

["Cédric Le Goater" <clg@redhat.com>]

A recent change in glibc 2.42.9000 [1] changes the return type of
strstr() and other string functions to be 'const char *' when the
input is a 'const char *'. This breaks the build in :

  ../hw/i386/x86-common.c:827:11: error: assignment discards ‘const’ qualifier from pointer target type [-Werror=discarded-qualifiers]
  827 |     vmode = strstr(kernel_cmdline, "vga=");
      |           ^

Fix this by changing the type of the variables that store the result
of these functions to 'const char *'.

[1] https://sourceware.org/git/?p=glibc.git;a=commit;h=cd748a63ab1a7ae846175c532a3daab341c62690

Signed-off-by: Cédric Le Goater <clg@redhat.com>
---
 hw/i386/x86-common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hw/i386/x86-common.c b/hw/i386/x86-common.c
index c844749900a30c9c9c284c529e93c84c9457b128..f77e2e63046ff56d079363e411a9ee0eca365291 100644
--- a/hw/i386/x86-common.c
+++ b/hw/i386/x86-common.c
@@ -654,7 +654,7 @@ void x86_load_linux(X86MachineState *x86ms,
     uint8_t header[8192], *setup, *kernel;
     hwaddr real_addr, prot_addr, cmdline_addr, initrd_addr = 0;
     FILE *f;
-    char *vmode;
+    const char *vmode;
     MachineState *machine = MACHINE(x86ms);
     struct setup_data *setup_data;
     const char *kernel_filename = machine->kernel_filename;
-- 
2.52.0