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[Bug 1001142] User defined linker sections.
- From: bugzilla-daemon at bugs dot ecos dot sourceware dot org
- To: unassigned at bugs dot ecos dot sourceware dot org
- Date: Mon, 14 Feb 2011 18:34:22 +0000
- Subject: [Bug 1001142] User defined linker sections.
- Auto-submitted: auto-generated
- References: <bug-1001142-777@http.bugs.ecos.sourceware.org/>
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--- Comment #15 from Sergei Gavrikov <sergei.gavrikov@gmail.com> 2011-02-14 18:34:18 GMT ---
(In reply to comment #11)
> I introduced them because of properties of CPP concatenation ## with
> respect to argument prescan.
> http://gcc.gnu.org/onlinedocs/cpp/Argument-Prescan.html#Argument-Prescan
> They are needed if "_name_" is a macro:
>
> #define FOO "foo"
> USER_SECTION(FOO, reg, vma, lma)
>
> Example use case is when the section name is provided via CDL. I
> would keep them but we may consider more suitable names.
Maybe "complexity" starts in the target's config, as that CDL booldata
(for the section's name) was set as a string
default_value { "foo" }
In fact then in the most we need to manage the labels and addresses
(!strings). If we avoid the first stringification, i.e. define in CDL
default_value foo
then we will have destringified things in pkgconf/* like
#define CYGHWR_~~~_FOO foo
#define CYGHWR_~~~_FOO_foo
And CYGHWR_~~~_...FOO is ready to use in .ld, .ldi, .h files, is it
not? Well, I call the LWIP's MEM_SECTION macro. If it make life easier,
I would prefer to add 1 "extra" line in lwipopts.h
#define STRINGIFY(x) #x
#define MEM_SECTION CYGBLD_ATTRIB_SECTION(STRINFIFY(CYGHWR_~~~_xxxFOO))
It seems to me this would let us do not use complex de-stringify macros in
arch. ld script.
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