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Jeremy, All, On Thursday 15 November 2012 09:53:16 Jeremy Rosen wrote: > for some time I was having trouble compiling crosstool-ng using buildroot > on my machine, > > it typically failed while building ppl with the type of error below > > [ERROR] /home/rosen/projets/mini2440/buildroot/output/build/build- > toolchain/.build/src/ppl-0.10.2/src/Interval.defs.hh:432:5: error: > 'f_info' was not declared in this scope, and no declarations were > found by argument-dependent lookup at the point of instantiation > [-fpermissive] > after some investigation (thx a lot to kos_tom on IRC) this error only > happens when compiling with gcc 4.7 on the host machine. > > the workaround (described at http://comments.gmane.org/gmane.comp. > gcc.cross-compiling/14909) is to add the -fpermissive flag to the host > compiler via the crosstool-ng compile option > I am sending this email for two reasons > 2) to ask how to write a workaround, or a way for crosstool-ng to detect > the problem. I was compiling the default gcc version from my buildroot > defconfig (which is 4.4.6) but trying with gcc 4.6 (latest version > available in ctng afaict) did not solve the problem... That's because it is not the cross-compiler that is at /fault/ here, but the compiler on your host. So, switching to another version in crosstool-NG will not solve the issue. > if anybody has an idea how to do an upstreamable patch, i would gladly > write it... In scripts/build/companion_libs/ppl.sh: - look for calls to ppl_do_backend (hint: two call sites) - just before those calls, add a line like: ppl_opts+=( "cflags=-fpermissive" ) - warning: there's already a call site that sets cflags ;-) This will unconditionally add the -fpermissive CFLAG when building ppl. I am not sure it is worth doing it conditionally on the gcc version. Regards, Yann E. MORIN. -- .-----------------.--------------------.------------------.--------------------. | Yann E. MORIN | Real-Time Embedded | /"\ ASCII RIBBON | Erics' conspiracy: | | +0/33 662376056 | Software Designer | \ / CAMPAIGN | ^ | | --==< O_o >==-- '------------.-------: X AGAINST | /e\ There is no | | http://ymorin.is-a-geek.org/ | (*_*) | / \ HTML MAIL | """ conspiracy. | '------------------------------'-------'------------------'--------------------' -- For unsubscribe information see http://sourceware.org/lists.html#faq
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