The glib compilation flags were added to QEMU_CFLAGS.  While we still
want them to be added to all compilation commands (at least for now),
do that via GLIB_CFLAGS rather than via QEMU_CFLAGS.  This shows that
glib is a special case and makes it clearer that QEMU_CFLAGS is only
about compiler commands and not dependencies.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 configure   | 19 +++++++++----------
 meson.build |  7 +++++--
 2 files changed, 14 insertions(+), 12 deletions(-)

diff --git a/configure b/configure
index d148242c9a..7d4e499202 100755
--- a/configure
+++ b/configure
@@ -3742,24 +3742,23 @@ if test "$plugins" = yes; then
     glib_modules="$glib_modules gmodule-2.0"
 fi
 
-# This workaround is required due to a bug in pkg-config file for glib as it
-# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static
-
-if test "$static" = yes && test "$mingw32" = yes; then
-    QEMU_CFLAGS="-DGLIB_STATIC_COMPILATION $QEMU_CFLAGS"
-fi
-
 for i in $glib_modules; do
     if $pkg_config --atleast-version=$glib_req_ver $i; then
         glib_cflags=$($pkg_config --cflags $i)
         glib_libs=$($pkg_config --libs $i)
-        QEMU_CFLAGS="$glib_cflags $QEMU_CFLAGS"
         LIBS="$glib_libs $LIBS"
     else
         error_exit "glib-$glib_req_ver $i is required to compile QEMU"
     fi
 done
 
+# This workaround is required due to a bug in pkg-config file for glib as it
+# doesn't define GLIB_STATIC_COMPILATION for pkg-config --static
+
+if test "$static" = yes && test "$mingw32" = yes; then
+    glib_cflags="-DGLIB_STATIC_COMPILATION $glib_cflags"
+fi
+
 if $pkg_config --atleast-version=$glib_req_ver gio-2.0; then
     gio=yes
     gio_cflags=$($pkg_config --cflags gio-2.0)
@@ -3794,7 +3793,7 @@ int main(void) {
 }
 EOF
 
-if ! compile_prog "$CFLAGS" "$LIBS" ; then
+if ! compile_prog "$glib_cflags" "$glib_libs" ; then
     error_exit "sizeof(size_t) doesn't match GLIB_SIZEOF_SIZE_T."\
                "You probably need to set PKG_CONFIG_LIBDIR"\
 	       "to point to the right pkg-config files for your"\
@@ -3809,7 +3808,7 @@ EOF
 if ! compile_prog "$glib_cflags -Werror" "$glib_libs" ; then
     if cc_has_warning_flag "-Wno-unknown-attributes"; then
         glib_cflags="-Wno-unknown-attributes $glib_cflags"
-        QEMU_CFLAGS="-Wno-unknown-attributes $CFLAGS"
+        CFLAGS="-Wno-unknown-attributes $CFLAGS"
     fi
 fi
 
diff --git a/meson.build b/meson.build
index 2455eb5e1a..6d0e61a05d 100644
--- a/meson.build
+++ b/meson.build
@@ -115,8 +115,11 @@ elif targetos == 'haiku'
             cc.find_library('network'),
             cc.find_library('bsd')]
 endif
-glib = declare_dependency(compile_args: config_host['GLIB_CFLAGS'].split(),
-                          link_args: config_host['GLIB_LIBS'].split())
+# The path to glib.h is added to all compilation commands.  This was
+# grandfathered in from the QEMU Makefiles.
+add_project_arguments(config_host['GLIB_CFLAGS'].split(),
+                      native: false, language: ['c', 'cpp', 'objc'])
+glib = declare_dependency(link_args: config_host['GLIB_LIBS'].split())
 gio = not_found
 if 'CONFIG_GIO' in config_host
   gio = declare_dependency(compile_args: config_host['GIO_CFLAGS'].split(),
-- 
2.26.2