From 660250f4da18f931f9240c4b52fe549b1fde4a69 Mon Sep 17 00:00:00 2001
From: Peter Kokot <peterkokot@gmail.com>
Date: Thu, 15 Jun 2017 02:30:39 +0200
Subject: [PATCH] Fix configure error

This patch fixes configure error on some systems such as Alpine.

```
 line 3472: test: =: unary operator expected
```

One of the fixes has been suggested also here already:
https://bugs.php.net/bug.php?id=39835

Thank you for considering merging this.
---
 NEWS         | 1 +
 acinclude.m4 | 2 +-
 2 files changed, 2 insertions(+), 1 deletion(-)

diff --git a/NEWS b/NEWS
index 75da8063fe7..6b84bde5222 100644
--- a/NEWS
+++ b/NEWS
@@ -5,6 +5,7 @@ PHP                                                                        NEWS
 - Core:
   . Fixed bug #74780 (parse_url() borken when query string contains colon). 
     (jhdxr)
+  . Fixed bug #74761 (Unary operator expected error on some systems). (petk)
 
 - SPL:
   . Fixed bug #73471 (PHP freezes with AppendIterator). (jhdxr)
diff --git a/acinclude.m4 b/acinclude.m4
index 36bd1c22e58..f5e0efa7294 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2687,7 +2687,7 @@ EOF
   done
 
   echo "'[$]0' \\" >> $1
-  if test `expr -- [$]0 : "'.*"` = 0; then
+  if test `expr " [$]0" : " '.*"` = 0; then
     CONFIGURE_COMMAND="$CONFIGURE_COMMAND '[$]0'"
   else 
     CONFIGURE_COMMAND="$CONFIGURE_COMMAND [$]0"