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Re: how to use the uninstalled C & C++ compilers?

On 03/31/2015 01:09 PM, Matthias Klose wrote:
> In the past (at least it worked for me in 4.9) it was possible to use the
> uninstalled C & C++ compilers to build another compiler, using the just built
> compilers.  Useful if you want to build e.g. libgccjit in a second step without
> bootstrapping again.  This doesn't seem to work anymore with 5. At least I can't
> get it working by removing the system c++ and g++ after the build of the first
> compiler and then building as
> CC=$(builddir)/gcc/xgcc -B$(builddir)/gcc/
> CXX=$(builddir)/gcc/xg++ -B$(builddir)/gcc/ \
>     -I$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/include \
>     -I$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/include/$(TARGET_ALIAS)
> and the next build (without bootstrapping) with these values. Did somebody got
> this working?  Sometimes it looks like gcc is built using the C compiler,
> sometimes it doesn't find the "new" header, and probably won't find the
> libstdc++ library later. Not setting CXX seems to silently use the g++ system
> compiler if it exists.

this is what is now working for me.

  CC = $(builddir)/gcc/xgcc -B$(builddir)/gcc/
  CXX = $(builddir)/gcc/xg++ -B$(builddir)/gcc/ \
        -B$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/src/.libs \
        -B$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/libsupc++/.libs \
        -I$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/include \
        -I$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/include/$(TARGET_ALIAS) \
        -I$(srcdir)/libstdc++-v3/libsupc++ \
        -L$(builddir)/$(TARGET_ALIAS)/libstdc++-v3/src/.libs \

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