On Sep 12, 2007, at 1:57 AM, Rask Ingemann Lambertsen wrote:
Not necessarily. __main() is used only on systems without
support for
constructors and destructors. This is described in the manual:
http://gcc.gnu.org/onlinedocs/gccint/Initialization.html
http://gcc.gnu.org/onlinedocs/gccint/Macros-for-Initialization.html
If your target defines the INIT_SECTION_ASM_OP macro, then __main()
isn't
normally used.
Thanks for that info. If I understand it correctly, the various
macros need to be defined when building GCC, right (not when building
target code).
How do I determine how my target was built? I chose --target=arm-elf,
and searching in the GCC sources for macro names like
TARGET_ASM_NAMED_SECTION and INIT_SECTION_ASM_OP turn up nothing in
gcc/config/arm/elf.h. Where else should I be looking?
If I need to change the configuration, how do I do that? On the
configure line? Or do I pre-define some things when calling make?
$ arm-elf-gcc -v
Using built-in specs.
Target: arm-elf
Configured with: ../configure --prefix=/usr/local/arm3 --target=arm-
elf --with-newlib --with-cpu=xscale --enable-languages=c,c++
Thread model: single
gcc version 4.2.1
Thanks!
--
Rick
