From 904ad5ec1583145ef411acb2dec63beeb12ea721 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@redhat.com>
Date: Wed, 7 Jul 2021 16:35:26 +0200
Subject: [PATCH] meson: switch function tests from compilation to linking

Some tests for glibc functions cause compilation to emit warnings but
still succeed even if the function is not there.  Therefore, change
from cc.compiles to cc.links.

Reported-by: Richard Zak <richard.j.zak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 meson.build | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/meson.build b/meson.build
index d9aa2d7820..5a56e3fe2f 100644
--- a/meson.build
+++ b/meson.build
@@ -1340,10 +1340,10 @@ config_host_data.set('HAVE_STRUCT_STAT_ST_ATIM',
                      cc.has_member('struct stat', 'st_atim',
                                    prefix: '#include <sys/stat.h>'))
 
-config_host_data.set('CONFIG_EVENTFD', cc.compiles('''
+config_host_data.set('CONFIG_EVENTFD', cc.links('''
   #include <sys/eventfd.h>
   int main(void) { return eventfd(0, EFD_NONBLOCK | EFD_CLOEXEC); }'''))
-config_host_data.set('CONFIG_FDATASYNC', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_FDATASYNC', cc.links(gnu_source_prefix + '''
   #include <unistd.h>
   int main(void) {
   #if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
@@ -1352,22 +1352,22 @@ config_host_data.set('CONFIG_FDATASYNC', cc.compiles(gnu_source_prefix + '''
   #error Not supported
   #endif
   }'''))
-config_host_data.set('CONFIG_MADVISE', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_MADVISE', cc.links(gnu_source_prefix + '''
   #include <sys/types.h>
   #include <sys/mman.h>
   #include <stddef.h>
   int main(void) { return madvise(NULL, 0, MADV_DONTNEED); }'''))
-config_host_data.set('CONFIG_MEMFD', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_MEMFD', cc.links(gnu_source_prefix + '''
   #include <sys/mman.h>
   int main(void) { return memfd_create("foo", MFD_ALLOW_SEALING); }'''))
-config_host_data.set('CONFIG_OPEN_BY_HANDLE', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_OPEN_BY_HANDLE', cc.links(gnu_source_prefix + '''
   #include <fcntl.h>
   #if !defined(AT_EMPTY_PATH)
   # error missing definition
   #else
   int main(void) { struct file_handle fh; return open_by_handle_at(0, &fh, 0); }
   #endif'''))
-config_host_data.set('CONFIG_PIPE2', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_PIPE2', cc.links(gnu_source_prefix + '''
   #include <unistd.h>
   #include <fcntl.h>
 
@@ -1376,16 +1376,16 @@ config_host_data.set('CONFIG_PIPE2', cc.compiles(gnu_source_prefix + '''
       int pipefd[2];
       return pipe2(pipefd, O_CLOEXEC);
   }'''))
-config_host_data.set('CONFIG_POSIX_MADVISE', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_POSIX_MADVISE', cc.links(gnu_source_prefix + '''
   #include <sys/mman.h>
   #include <stddef.h>
   int main(void) { return posix_madvise(NULL, 0, POSIX_MADV_DONTNEED); }'''))
-config_host_data.set('CONFIG_SIGNALFD', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_SIGNALFD', cc.links(gnu_source_prefix + '''
   #include <unistd.h>
   #include <sys/syscall.h>
   #include <signal.h>
   int main(void) { return syscall(SYS_signalfd, -1, NULL, _NSIG / 8); }'''))
-config_host_data.set('CONFIG_SPLICE', cc.compiles(gnu_source_prefix + '''
+config_host_data.set('CONFIG_SPLICE', cc.links(gnu_source_prefix + '''
   #include <unistd.h>
   #include <fcntl.h>
   #include <limits.h>