Hi, On Sun, 16 Oct 2016, Christian Jullien wrote:
Ok Michael, It is defined in sys/cdefs.h as: #if __GNUC_PREREQ__(2, 7) || defined(__INTEL_COMPILER) #define __dead2 __attribute__((__noreturn__)) #define __pure2 __attribute__((__const__)) #define __unused __attribute__((__unused__)) #define __used __attribute__((__used__)) #define __packed __attribute__((__packed__)) #define __aligned(x) __attribute__((__aligned__(x))) #define __section(x) __attribute__((__section__(x))) #endif
Yeah, we gathered this meanwhile from grischkas research. A bug in FreeBSDs header (the bug being that there's no fallback definition of the macros that are nevertheless used unconditionally in standard headers).
Now, I do agree that we'd want to add a work around for this in tcc. I think a better work-around than defining __GNUC__ is to define the above macros instead. __GNUC__ simply has quite some side-effects. (E.g. after the patch you can't compile programs on some versions of glibc anymore because it then uses facilities of GNU C that tcc simply doesn't implement).
- tcc_define_symbol(s, "__GNUC_MINOR__", "1"); + tcc_define_symbol(s, "__GNUC_MINOR__", "7"); And it helps a little bit, now I get the same result as if I define __aligned(x) __attribute__((__aligned__(x))) i.e. code compiles (with __aligned defined) but std C library is not found. ------------ test3 ------------ ../tcc -B.. -I../include -I.. -I.. -DTCC_TARGET_I386 -DONE_SOURCE -run ../tcc.c -B.. -I../include -I.. -I.. -DTCC_TARGET_I386 -DONE_SOURCE -run ../tcc.c -B.. -I../include -I.. -I.. -DTCC_TARGET_I386 -DONE_SOURCE -run ../tcc.c -B.. -I../include -I.. -I.. -run tcctest.c > test.out3 tcc: error: undefined symbol 'memcpy' ...
Yes, I wrote a paragraph about this in my initial answer of how you should start trying to corner this problem.
Ciao, Michael. _______________________________________________ Tinycc-devel mailing list Tinycc-devel@nongnu.org https://lists.nongnu.org/mailman/listinfo/tinycc-devel
