[PATCH] aclocal.m4: fix macro

[Evgeny Litvinenko]

Signed-off-by: Evgeny Litvinenko <evgeny.v.litvinenko at gmail.com>
---

With this fix it is possible to nest the WINE_TRY_SHLIB_FLAGS macro.
    
Example:
WINE_TRY_SHLIB_FLAGS([first set of flags],
                     [ac_cv_c_dll_flags="first set of flags"],
                     [WINE_TRY_SHLIB_FLAGS([second set of flags],
                                           [ac_cv_c_dll_flags="second set of flags"],
                                           [ac_cv_c_dll_flags="third set of flags"])])

 aclocal.m4 | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/aclocal.m4 b/aclocal.m4
index ed0c3a8317..194b3a9d93 100644
--- a/aclocal.m4
+++ b/aclocal.m4
@@ -178,10 +178,14 @@ dnl
 dnl Usage: WINE_TRY_SHLIB_FLAGS(flags,[action-if-yes,[action-if-no]])
 dnl
 AC_DEFUN([WINE_TRY_SHLIB_FLAGS],
-[ac_wine_try_cflags_saved=$CFLAGS
+[AS_VAR_PUSHDEF([ac_var], ac_cv_cflags_[[$1]])dnl
+ac_wine_try_cflags_saved=$CFLAGS
 CFLAGS="$CFLAGS $1"
-AC_LINK_IFELSE([AC_LANG_SOURCE([void myfunc() {}])],[$2],[$3])
-CFLAGS=$ac_wine_try_cflags_saved])
+AC_LINK_IFELSE([AC_LANG_SOURCE([[void myfunc() {}]])],
+               [AS_VAR_SET(ac_var,yes)], [AS_VAR_SET(ac_var,no)])
+CFLAGS=$ac_wine_try_cflags_saved
+AS_VAR_IF([ac_var],[yes], [$2], [$3])dnl
+AS_VAR_POPDEF([ac_var])])
 
 dnl **** Check whether we need to define a symbol on the compiler command line ****
 dnl
-- 
2.23.0