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Attempting to build CHDK under OS X - some success, some problems.

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Offline whim

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #10 on: 29 / November / 2008, 12:30:58 »
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Hi !

Quote
GCC_VERSION=$(shell $(CC) -dumpversion)
GCC_VERSION_MAJOR=$(firstword $(subst ., ,$(GCC_VERSION)))

# -msoft-float is used per default but object files are marked as hard-float
CFLAGS=-fno-inline -Os -fno-strict-aliasing
# flags for gcc v4
# CFLAGS+=-mcpu=arm946e-s
# for gcc v3, we use to allow use of strd etc
ifeq ($(GCC_VERSION_MAJOR),3)
    CFLAGS+=-march=armv5te
else
    ifeq ($(GCC_VERSION_MAJOR),4)
        # TODO should be -mcpu, but breaks things ATM
        CFLAGS+=-mtune=arm946e-s
    endif
endif

I suppose it is in the above (quoted from makefile.inc); since a couple of versions
the settings are auto-adapted to the compiler version. My guess would be that
your early version 4 has problems with this flag on our current code ?

wim

PS also read this thread gcc. windows dev kit, binary size & the whole ordeal (discussion here) about the
GCC 3 / 4 troubles ...

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Offline reyalp

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #11 on: 29 / November / 2008, 18:23:20 »
It depends on how your GCC 4 was built, per the thread whim linked. If you configure with:
../configure --target=arm-elf --prefix=~/arm-tools --enable-languages=c --disable-sanity-checks --disable-shared --disable-newlib --disable-libssp

(note, no CPU specified) it should (?) work.
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Offline zeno

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #12 on: 29 / November / 2008, 18:26:49 »
Thanks to both of you. I'll investigate and report back.
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Offline zeno

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #13 on: 30 / November / 2008, 09:58:06 »
When I checked my gcc it says
Code: [Select]
dave-mitchells-imac:trunk509 dave$ arm-elf-gcc -v
Using built-in specs.
Target: arm-elf
Configured with: ./configure --target=arm-elf --prefix=/usr/local/arm --enable-interwork --enable-multilib
    --enable-languages=c,c++ --with-newlib --with-headers=../../src/newlib-1.14.0/newlib/libc/include
Thread model: single
gcc version 4.1.0
So it seems no cpu was specified anyway.
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Offline reyalp

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #14 on: 30 / November / 2008, 16:49:25 »
Interesting. One other difference is that you are using  GCC 4.1.0, while the rest of us using gcc4 are on 4.3.x

You also don't need c++ or newlib support.

Another option would be to build GCC3 using the patch provided in the CHDK source.
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Offline zeno

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Re: Attempting to build CHDK under OS X - some success, some problems.
« Reply #15 on: 01 / December / 2008, 07:02:30 »
Many thanks reyalp. I just upgraded to 4.3.2 and everything now compiles!

My total lack of unix experience (after 25 years of PC DOS, OS/2 and Windows) meant it took me quite a time to upgrade. It turns out I needed to selfupgrade my macports first (it was downloading 4.1.0),  deactivate the old arm-elf-gcc, install the latest version and then completely reset my PATH (which had lots of junk in it).
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