Commit 95609061 authored by Thomas Schmitt's avatar Thomas Schmitt

Introduced compile time check of libburn header version

parent d4980035
......@@ -1909,19 +1909,49 @@ int Cdrpreskin_initialize_lib(struct CdrpreskiN *preskin, int flag)
{
int ret, major, minor, micro;
/* This is the minimum requirement of cdrskin towards the libburn header
at compile time.
It gets compared against the version macros in libburn/libburn.h :
burn_header_version_major
burn_header_version_minor
burn_header_version_micro
If the header is too old then the following code shall cause failure of
cdrskin compilation rather than to allow production of a program with
unpredictable bugs or memory corruption.
The compiler message supposed to appear in this case is:
error: 'INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libburn_dot_h_TOO_OLD__SEE_cdrskin_dot_c' undeclared (first use in this function)
*/
/* The indendation is an advise of man gcc to help old compilers ignoring */
#if Cdrskin_libburn_majoR > burn_header_version_major
#define Cdrskin_libburn_dot_h_too_olD 1
#endif
#if Cdrskin_libburn_majoR == burn_header_version_major && Cdrskin_libburn_minoR > burn_header_version_minor
#define Cdrskin_libburn_dot_h_too_olD 1
#endif
#if Cdrskin_libburn_minoR == burn_header_version_minor && Cdrskin_libburn_micrO > burn_header_version_micro
#define Cdrskin_libburn_dot_h_too_olD 1
#endif
#ifdef Cdrskin_libburn_dot_h_too_olD
INTENTIONAL_ABORT_OF_COMPILATION__HEADERFILE_libburn_dot_h_TOO_OLD__SEE_cdrskin_dot_c = 0;
#endif
ret= burn_initialize();
if(ret==0) {
fprintf(stderr,"cdrskin: FATAL : Initialization of libburn failed\n");
return(0);
}
burn_version(&major, &minor, &micro);
/* <<< for testing only */
/* major= 0; minor= 3; micro= 6; */
if(major<Cdrskin_libburn_majoR ||
(major==Cdrskin_libburn_majoR && (minor<Cdrskin_libburn_minoR ||
(minor==Cdrskin_libburn_minoR && micro<Cdrskin_libburn_micrO)))) {
/* This is the runtime check towards eventual dynamically linked libburn.
cdrskin deliberately does not to allow the library to be older than
the header file which was seen at compile time. More liberal would be
to use here Cdrskin_libburn_* instead of burn_header_version_* .
*/
burn_version(&major, &minor, &micro);
if(major<burn_header_version_major ||
(major==burn_header_version_major && (minor<burn_header_version_minor ||
(minor==burn_header_version_minor && micro<burn_header_version_micro)))) {
fprintf(stderr,"cdrskin: FATAL : libburn version too old: %d.%d.%d . Need at least: %d.%d.%d .\n",
major, minor, micro,
Cdrskin_libburn_majoR, Cdrskin_libburn_minoR, Cdrskin_libburn_micrO);
......
#define Cdrskin_timestamP "2008.01.29.214110"
#define Cdrskin_timestamP "2008.01.31.111057"
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