Avoid syntax errors on some operating systems

diff --git a/acinclude.m4 b/acinclude.m4
index 75dedace14b060dc837481a5723c544d78ec7f77..683304e57f8ca2d6c3055a2223fdd750ea7a67d2 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -2363,7 +2363,7 @@ AC_DEFUN([PHP_INSTALL_HEADERS],[
     done 
   else
     header_path=$1
-    for header_file in $2; do
+    for header_file in "$2"; do
       hp_hf="$header_path/$header_file"
       PHP_RUN_ONCE(INSTALLHEADERS, $hp_hf, [
         INSTALL_EXT_HEADERS="$INSTALL_EXT_HEADERS $hp_hf"