[PATCH] sdksyms.sh: Make sdksyms.sh work with gcc5.

[Hans de Goede]

gcc5's cpp inserts patterns like this:

extern
      __attribute__((visibility("default")))
                int WaitForSomething(int *
    );

This patch make sdksyms.sh work with this. Note my awk skills are weak, so
there likely is a better way to deal with this.

Signed-off-by: Hans de Goede <hdegoede at redhat.com>
---
 hw/xfree86/sdksyms.sh | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/hw/xfree86/sdksyms.sh b/hw/xfree86/sdksyms.sh
index 2305073..99b0cae 100755
--- a/hw/xfree86/sdksyms.sh
+++ b/hw/xfree86/sdksyms.sh
@@ -350,6 +350,23 @@ BEGIN {
     if (sdk) {
 	n = 3;
 
+	# detect the following gcc5 cpp pattern and skip it:
+	# extern
+	# # 320 "../../include/os.h" 3 4
+	#     __attribute__((visibility("default")))
+	# # 320 "../../include/os.h"
+	# Note in this case the "extern " or "extern void " always has
+	# a trailing space
+	if ($0 ~ "^extern.* $") {
+	    getline;
+	    getline;
+	    getline;
+	    getline;
+	    n = 1;
+	    while ($n == " ")
+		n++;
+	}
+
 	# skip attribute, if any
 	while ($n ~ /^(__attribute__|__global)/ ||
 	    # skip modifiers, if any
-- 
2.1.0