on how to compile gcc-4.6 correctly?

[Justin P. Mattock]

On 09/05/2010 08:17 PM, Dennis wrote:
> Hi, all,
>    I'm using gentoo distribution (including gmp/mpfr/mpc) that could compile
> gcc-4.5.0, 4.5.1, and many snapshots correctly, including the recent one gcc-4.5-20100902,
> but when I tried to compile gcc-4.6, any snapshot version, even recent gcc-4.6-20100904,
> it always failed, the recent one failure compiling is:
>
> ../../gcc-4.6-20100904/gcc/c-decl.c: In function 'grokdeclarator':
> ../../gcc-4.6-20100904/gcc/c-decl.c:5533: warning: format not a string literal and no format arguments
> ../../gcc-4.6-20100904/gcc/c-decl.c: In function 'grokparms':
> ../../gcc-4.6-20100904/gcc/c-decl.c:6194: warning: format not a string literal and no format arguments
> ../../gcc-4.6-20100904/gcc/c-decl.c:7025:64: error: macro "ggc_alloc_cleared_lang_type" passed 1 arguments, but takes just 0
> ../../gcc-4.6-20100904/gcc/c-decl.c: In function 'finish_struct':
> ../../gcc-4.6-20100904/gcc/c-decl.c:7025: error: 'ggc_alloc_cleared_lang_type' undeclared (first use in this function)
> ../../gcc-4.6-20100904/gcc/c-decl.c:7025: error: (Each undeclared identifier is reported only once
> ../../gcc-4.6-20100904/gcc/c-decl.c:7025: error: for each function it appears in.)
> ../../gcc-4.6-20100904/gcc/c-decl.c:7308:62: error: macro "ggc_alloc_cleared_lang_type" passed 1 arguments, but takes just 0
> ../../gcc-4.6-20100904/gcc/c-decl.c: In function 'finish_enum':
> ../../gcc-4.6-20100904/gcc/c-decl.c:7308: error: 'ggc_alloc_cleared_lang_type' undeclared (first use in this function)
> make: *** [c-decl.o] Error 1
>
> I don't know what happened with that? When I search the 'ggc_alloc_cleared_lang_type' macro,
> it really doesn't exist in the gcc-4.6-20100904 source, nor under /usr/include, so what is
> that macro real dependency? the prerequisites page seems not help me,
> http://gcc.gnu.org/install/prerequisites.html
>
> Who have successfully build gcc-4.6 please help me, or have any clue, I have searched that ggc_alloc_cleared_lang_type
> through google, but didn't find out any meaningful results,
>
> please make sure have my email address on cc-list that I can receive your email, because I didn't subscribe such
> high volume mailing list,
>
> Thank you very much,
>
> --
> Dennis, from Singapore
>


hm... an obvious question would be if you have your toolchain correct?
(but you probably do..(I used this to build 
4.6.0..:http://cross-lfs.org/view/svn/x86_64-64/))

in your case I see something with lang... maybe your CFLAGS are set 
wrong to the wrong machine?! over here my CFLAGS look like this:
CFLAGS="-m64 -mtune=core2 -march=core2 -O2 -pipe -fomit-frame-pointer 
-fstack-protector -w" CXXFLAGS="${CFLAGS}" MAKEOPTS="{-j3}"

keep in mind this is for a intel iMac... your system could be diff..

Justin P. Mattock