diff --git a/meson.build b/meson.build
index 484e7e8ed..0744164f3 100644
--- a/meson.build
+++ b/meson.build
@@ -567,8 +567,10 @@ foreach m : struct_members
   endif
 endforeach
 
+glib_gnu_cc_compiler = cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+
 # Compiler flags
-if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+if glib_gnu_cc_compiler
   warning_common_args = [
     '-Wduplicated-branches',
     '-Wfloat-conversion',
@@ -1784,7 +1786,7 @@ g_sizet_compatibility = {
 # Do separate checks for gcc/clang (and ignore other compilers for now), since
 # we need to explicitly pass -Werror to the compilers.
 # FIXME: https://github.com/mesonbuild/meson/issues/5399
-if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+if glib_gnu_cc_compiler
   foreach type_name, size_compatibility : g_sizet_compatibility
     g_sizet_compatibility += { type_name: size_compatibility and
       cc.compiles(
@@ -2082,7 +2084,7 @@ if cc.get_id() == 'msvc' or cc.get_id() == 'clang-cl' or cc.links(atomictest, na
     glib_conf.set('__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4', true)
   endif
 
-  if cc.get_id() == 'gcc' or cc.get_id() == 'clang'
+  if glib_gnu_cc_compiler
     sync_swap_test = '''
       int main() {
         int atomic = 2;