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What is CYGBLD_ATTRIB_WEAK ?
- From: Santanu Chatterjee <thisissantanu at gmail dot com>
- To: ecos-discuss at ecos dot sourceware dot org
- Date: Tue, 23 Aug 2005 16:11:33 +0530
- Subject: [ECOS] What is CYGBLD_ATTRIB_WEAK ?
Hello everybody,
I was trying to go through some of the source code of eCos, and stumbled across
the following in "ecos-2.0/packages/hal/common/v2_0/src/generic-stub.c":
------------------------------------------------------------------------------------------
#ifdef __ECOS__
char GDB_stubs_version[] CYGBLD_ATTRIB_WEAK =
"eCos GDB stubs - built " __DATE__ " / " __TIME__;
#endif
------------------------------------------------------------------------------------------
I could not understand the construct. What is CYGBLD_ATTRIB_WEAK?
etags search brings me to the same place. I grepped around and
found:
-----------------------------------------------------------------------------------
# define CYGBLD_ATTRIB_WEAK __attribute__ ((weak))
-----------------------------------------------------------------------------------
in "ecos-2.0/tools/src/infra/cyg_type.h". But I could not find out much
about this __attribute__ thing.
Could anyone here please help me out? I just want to find out how the
code within the #ifdef ... #endif expands to. I know about the -E option
in gcc but don't know how to apply it here.
Regards,
Santanu
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