Alexandre Julliard : configure: Define __STDC__ to work around clang breakage in MSVC mode.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: 8f27e8f601af5e591d7f91367290f9d5140860de
URL:    https://gitlab.winehq.org/wine/wine/-/commit/8f27e8f601af5e591d7f91367290f9d...

Author: Alexandre Julliard <julliard(a)winehq.org>
Date:   Thu Jul  6 13:42:56 2023 +0200

configure: Define __STDC__ to work around clang breakage in MSVC mode.

---

 configure    | 2 +-
 configure.ac | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index a6736d138c6..262222bfed4 100755
--- a/configure
+++ b/configure
@@ -10701,7 +10701,7 @@ then :
   printf %s "(cached) " >&6
 else $as_nop
   eval "$as_wine_cv_crosscc_c99=no"
-         for arg in '' '-std=gnu99'
+         for arg in '' '-std=gnu99' '-D__STDC__'
          do
              test -z "$arg" || CC="$CC $arg"
              cat confdefs.h - <<_ACEOF >conftest.$ac_ext
diff --git a/configure.ac b/configure.ac
index 6b75edc254e..d43dc662eb3 100644
--- a/configure.ac
+++ b/configure.ac
@@ -908,7 +908,7 @@ do
     AC_MSG_CHECKING([for $CC option to enable C99 features])
     AC_CACHE_VAL([wine_cv_crosscc_c99],
         [AS_VAR_SET([wine_cv_crosscc_c99],[no])
-         for arg in '' '-std=gnu99'
+         for arg in '' '-std=gnu99' '-D__STDC__'
          do
              test -z "$arg" || CC="$CC $arg"
              AC_COMPILE_IFELSE([AC_LANG_SOURCE([$ac_c_conftest_c99_program])],