/usr/include/php5/ext/gd/gd_compat.h is in php5-dev 5.5.9+dfsg-1ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | #ifndef GD_COMPAT_H
#define GD_COMPAT_H 1
#ifndef HAVE_GD_BUNDLED
/* from gd_compat.c */
const char * gdPngGetVersionString();
const char * gdJpegGetVersionString();
int gdJpegGetVersionInt();
#endif
/* from gd_compat.c of libgd/gd_security.c */
int overflow2(int a, int b);
#endif /* GD_COMPAT_H */
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