Adding upstream version 1.29.3.upstream/1.29.3upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 23 insertions, 0 deletions

diff --git a/build/m4/ax_c_statement_expressions.m4 b/build/m4/ax_c_statement_expressions.m4
new file mode 100644
index 0000000..fb259e7
--- /dev/null
+++ b/build/m4/ax_c_statement_expressions.m4
@@ -0,0 +1,23 @@
+# AC_C_STMT_EXPR
+# -------------
+# Define HAVE_STMT_EXPR if compiler has statement expressions.
+AN_IDENTIFIER([_Generic], [AC_C_STMT_EXPR])
+AC_DEFUN([AC_C_STMT_EXPR],
+[AC_CACHE_CHECK([for statement expressions], ac_cv_c_stmt_expr,
+[AC_COMPILE_IFELSE(
+   [AC_LANG_SOURCE(
+      [[int
+        main (int argc, char **argv)
+        {
+          int x = ({ int y = 1; y; });
+          return x;
+        }
+      ]])],
+   [ac_cv_c_stmt_expr=yes],
+   [ac_cv_c_stmt_expr=no])])
+if test $ac_cv_c_stmt_expr = yes; then
+  AC_DEFINE([HAVE_STMT_EXPR], 1,
+           [Define to 1 if compiler supports statement expressions.])
+fi
+])# AC_C_STMT_EXPR
+