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Re: Link error building eCos CVS host tools on FC2 -> resolved


Andrew Lunn writes:

> > I'm using gcc (GCC) 3.3.3 20040412 (Red Hat Linux 3.3.3-7).
> 
> This sounds like a compiler/linker bug. It compiles fine on my Debian
> unstable system with gcc version 3.3.5.
> 
> The post says he had to tell gcc where libstdc++. For my toolchain
> this happens automatically:

My libstdc++ is in /usr/lib.

I discovered that the link succeeds if I put

    -L/opt/ecos/ecos-cvs-build/host/libcdl

prior to -lcdl, so it looks like this:

    c++ -pipe -Wall -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Woverloaded-virtual -O0   -o ecosconfig  ecosconfig.o cdl_exec.o build.o flags.o  -lcdl -lcyginfra -L/usr/lib -ltcl8.4  -L/opt/ecos/ecos-cvs-build/host/libcdl -L/opt/ecos/ecos-cvs-build/host/infra

instead of the default:

    c++ -pipe -Wall -Wpointer-arith -Wbad-function-cast -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wnested-externs -Woverloaded-virtual -O0   -o ecosconfig  ecosconfig.o cdl_exec.o build.o flags.o -L/opt/ecos/ecos-cvs-build/host/libcdl  -lcdl -lcyginfra -L/usr/lib -ltcl8.4 -L/opt/ecos/ecos-cvs-build/host/infra

(I did this by editing the Makefile after the failure, and then
re-running make.)

This doesn't make sense, since the ld documentation clearly states that:

    All -L options apply to all -l options, regardless of the order in
    which the options appear.

I installed the latest binutils, but the effect was the same.

So even though I don't understand the root cause (some sort of
tool chain hiccup), I can now build the host tools.

Thanks for the suggestions.

Craig

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