Re: [PATCH] Add --with-build-config=bootstrap-asan support

[Tobias Burnus <burnus at net-b dot de>]

H.J. Lu wrote:
> Please try this: http://gcc.gnu.org/ml/gcc-patches/2012-11/msg01530.html 

I just did locally "git log -2 -p|patch -p1 -R" - and wait until you 
sort that out with the patch reviewers, which seemingly didn't like that 
patch.


BTW: I am not sure whether it is possible with the current build system, 
but I'd prefer: if libsanitizer is not needed (i.e. no bootstrap-asan is 
used), it is only build as target library in stage2/stage3 and not also 
in stage1 as host library.



Tobias Burnus wrote:
> I think that patch has broken bootstrap for me. If I do a normal 
> bootstrap, Stage1 fails with:

I should have quoted more. Note that the "g++" or similar is missing 
before "-D_GNU_SOURCE":

/bin/sh ../libtool --tag=CXX   --mode=compile  -D_GNU_SOURCE -D_DEBUG 
-D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS  
-I. -I../../../../libsanitizer/interception -I 
../../../../libsanitizer/include   -Wall -W -Wno-unused-parameter 
-Wwrite-strings -pedantic -Wno-long-long  -fPIC -fno-builtin 
-fno-exceptions -fomit-frame-pointer -funwind-tables -fvisibility=hidden 
-Wno-variadic-macros -Wno-c99-extensions  -g -O2 -D_GNU_SOURCE -MT 
interception_mac.lo -MD -MP -MF .deps/interception_mac.Tpo -c -o 
interception_mac.lo 
../../../../libsanitizer/interception/interception_mac.cc

Thus, for libsanitizer, the $(CXX) variable is not set, when invoked via 
build root's Makefile. Which gets set via 'CXX=$$(RAW_CXX_FOR_TARGET)'

Tobias