configure: add check for GNU indent

Only GNU indent is supported when indenting autogenerated format_pack.c
and format_unpack.c files. Some non-GNU indent (Mac OS X and FreeBSD)
add extra whitespaces than break the build of those files.

Fallback to 'cat' if a non-GNU indent is found.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=88335
Signed-off-by: Samuel Iglesias Gonsalvez <siglesias@igalia.com>
Tested-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>

diff --git a/configure.ac b/configure.ac
index 3c614ea5c4dcb0ced41599ce0740353f4e9932e4..c72fe9272b00cc52040a3ecb799a5fdcb399da73 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -73,7 +73,13 @@ AX_PROG_FLEX([],
 
 AC_CHECK_PROG(INDENT, indent, indent, cat)
 if test "x$INDENT" != "xcat"; then
-    AC_SUBST(INDENT_FLAGS, '-i4 -nut -br -brs -npcs -ce -TGLubyte -TGLbyte -TBool')
+    # Only GNU indent is supported
+    INDENT_VERSION=`indent --version | grep GNU`
+    if test $? -eq 0; then
+       AC_SUBST(INDENT_FLAGS, '-i4 -nut -br -brs -npcs -ce -TGLubyte -TGLbyte -TBool')
+    else
+       INDENT="cat"
+    fi
 fi
 
 AX_CHECK_PYTHON_MAKO_MODULE(0.3.4)