Newbie question - tmpnam error

[Kalai Narayanan-SSI]

Yann,

I had to set the LDFLAGS because it was not picking up the correct library versions for gmp while compiling ppl (during the gmp version check).

CT_PREFIX_BUILD - I wanted the prefix to distinguish from the tools that were already installed on the system.

CT_CC_ENABLE_CXX_FLAGS - I went through a few online suggestions from stackoverflow.com and added them in. W/o these options, I was seeing the following error ...

[ERROR]    checking for extra compiler flags for building... configure: error: --enable-cxx-flags needs compiler flags as arguments
[ERROR]    checking for cexp in -lm... make[2]: *** [configure-target-libstdc++-v3] Error 1
[ERROR]    make[1]: *** [all] Error 2

I didn't want to try the known build as I wanted support for arm64 in gcc and I could see that the linaro build had the support for it.

-Kalai


-----Original Message-----
From: Yann E. MORIN [mailto:yann.morin.1998@gmail.com] On Behalf Of Yann E. MORIN
Sent: Monday, January 28, 2013 2:43 PM
To: Kalai Narayanan-SSI
Cc: crossgcc@sourceware.org; Bryan Hundven
Subject: Re: Newbie question - tmpnam error

Kalai, All,

On Monday 28 January 2013 Kalai Narayanan-SSI wrote:
> Here is the .config. I have uploaded the build.log at 
> https://www.dropbox.com/s/5oyqp6sz3aswkw0/build.log
[--SNIP--]
> CT_EXTRA_LDFLAGS_FOR_BUILD="-L/share/projects/IP/local_5.8/ct/arm-unkn
> own 
> -linux-uclibcgnueabi/.build/arm-unknown-linux-uclibcgnueabi/buildtools/lib/"
> CT_EXTRA_LDFLAGS_FOR_HOST="-L/share/projects/IP/local_5.8/ct/arm-unkno
> wn- 
> linux-uclibcgnueabi/.build/arm-unknown-linux-uclibcgnueabi/buildtools/lib/"

Why did you set the LDFLAGS thus? It is not needed at all, and will probably break the build is a way or another.

Leave that empty.

(BTW, how did you come to setting those variables to those exact values?)

[--SNIP-]
> CT_BUILD_PREFIX="arm-elf-"

What are you trying to achieve with that?
CT_BUILD_PREFIX tells ct-ng what to prepend to host tools (eg. the native gcc, ar, ld...).

Leave that empty, too.

[--SNIP--]
> CT_CC_ENABLE_CXX_FLAGS="-fno-data-sections -fno-function-sections"

Hmm. I think that, as a starter, you should try starting with a known working configuration, and change things one by one to your needs.

For example, start with the bundled arm-unknown-linux-uclibcgnueabi sample (as I explained in my previous mail).

Once you have a working toolchain from that sample, change one thing at a time and rebuild. That will give you a known-working starting point, and you can see what change breaks the build.

Regards,
Yann E. MORIN.

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