build: PHP<7.2 compatibility

[m6w6/ext-psi] / m4 / ax / ax_check_sign.m4

diff --git a/m4/ax/ax_check_sign.m4 b/m4/ax/ax_check_sign.m4
index 5c925c2c31e2ffa02bb69755b0b6d3a2f11a49b3..e0292bcc55165addabfb0d5aecf15bfbceae7902 100644 (file)
--- a/m4/ax/ax_check_sign.m4
+++ b/m4/ax/ax_check_sign.m4
@@ -40,7 +40,7 @@
 AC_DEFUN([AX_CHECK_SIGN], [
        typename=`echo $1 | sed "s/@<:@^a-zA-Z0-9_@:>@/_/g"`
        AC_CACHE_CHECK([whether $1 is signed], ax_cv_decl_${typename}_signed, [
-                       AC_TRY_COMPILE([$4],
+                       AC_TRY_COMPILE($4,
                                        [ int foo @<:@ 1 - 2 * !((($1) -1) < 0) @:>@ ],
                                        [ eval "ax_cv_decl_${typename}_signed=\"yes\"" ],
                                        [ eval "ax_cv_decl_${typename}_signed=\"no\"" ])])