apply @petk feedback

Author: devnexen

Zend/Zend.m4

@@ -156,35 +156,10 @@ dnl ZEND_CHECK_SIGSETJMP
 dnl
 dnl Check for sigsetjmp.
 dnl
-AC_DEFUN([ZEND_CHECK_SIGSETJMP],
-[AC_CACHE_CHECK([sigsetjmp availability whether as function or macro],
-[php_cv_have_sigsetjmp],
-[AC_RUN_IFELSE([AC_LANG_SOURCE([
-#include <setjmp.h>
-#include <signal.h>
-
-sigjmp_buf jmp;
-
-void handler(int s)
-{
-    siglongjmp(jmp, 1);
-}
-
-int main(void)
-{
-    signal(SIGTERM, handler);
-    (void)sigsetjmp(jmp, 1);
-    return 0;
-}
-])],
-  [php_cv_have_sigsetjmp=yes],
-  [php_cv_have_sigsetjmp=no],
-  [php_cv_have_sigsetjmp=no])])
-AS_VAR_IF([php_cv_have_sigsetjmp], [no],
-  [AC_MSG_ERROR([sigsetjmp check failed. Please, check config.log])],
-  [])
-])
-  
+AC_CHECK_FUNC([sigsetjmp],,
+  [AC_CHECK_DECL([sigsetjmp],,
+    [AC_MSG_ERROR([sigsetjmp check failed. Please, check config.log])],
+    [#include <setjmp.h>])]) 
 
 ZEND_CHECK_STACK_DIRECTION
 ZEND_CHECK_FLOAT_PRECISION
@@ -226,7 +201,6 @@ if test "$ZEND_ZTS" = "yes"; then
   CFLAGS="$CFLAGS -DZTS"
 fi
 
-ZEND_CHECK_SIGSETJMP
 ZEND_CHECK_ALIGNMENT
 ZEND_CHECK_SIGNALS
 ZEND_CHECK_MAX_EXECUTION_TIMERS