chexmix wrote:
I b0rked the Sage install on my netbook by somehow bungling upgrade(), so decided to reinstall from source (I run Linux, but it's neither Red Hat-based nor Debian/Ubuntu-oid ... it's Slackware).For the first time ever, the Sage build failed. The details: OS is Slackware Linux 14.0, 64-bit 'current branch'. The cpu is an Intel(R) Atom(TM) CPU N570 @ 1.66GHz I ran a script session to capture the build output. Here is the end, where it crashes out: gcc -O2 -g -fPIC -pipe -I. -I.. -I/home/chexmix/sage-5.9/local -I/home/chexmix/sage-5.9/local/include -I/home/chexmix/sage-5.9/local/include -I/home/chexmix/sage-5.9/local/include -I/usr/local/include -DNDEBUG -DOM_NDEBUG -Dx86_64_Linux -DHAVE_CONFIG_H -c weight0.c In file included from ../kernel/si_gmp.h:4:0, from ../kernel/structs.h:15, from weight0.c:13: ../factory/cf_gmp.h:2501:28: fatal error: bits/c++config.h: No such file or directory #include <bits/c++config.h> ^ compilation terminated. make[4]: *** [weight0.o] Error 1 make[4]: Leaving directory `/home/chexmix/sage-5.9/spkg/build/singular-3-1-5.p7/src/kernel' make[3]: *** [install-nolns] Error 1 make[3]: Leaving directory `/home/chexmix/sage-5.9/spkg/build/singular-3-1-5.p7/src' Unable to build and install Singular Error building Singular (error in build_singular). ------------------ I've Googled on it a bit & it is a not-uncommon error, but so far I haven't puzzled out where the fault lies nor how I might fix it ... so I thought I would post it here.
Yep, apparently some kind of Singular bug; on some systems / distros, it puts inclusions of (mainly) C++ headers into cf_gmp.h, and these are not in the default search path for header files when GCC compiles C.
Just fixing the generated header isn't that easy, as spkg-install invokes 'make' a couple of times (and does other things inbetween, also first patches the sources IIRC).
I don't recall any simple work-around (besides building Sage's GCC), but adding the folder that contains <bits/c++config.h> to CPATH *may* work. (It's usually in or below /usr/include/c++, or e.g. /usr/lib/gcc/x86_64-linux-gnu/4.8.0/include/c++/x86_64-linux-gnu/bits/c++config.h.)
Perhaps a gcc bug? I neglected to note the gcc version on the box in question (which is at home).
I'd say your GCC installation was broken if it didn't have bits/c++config.h at all.
Before you make further attempts, could you save the offending cf_gmp.h (and the corresponding config.log, from spkg/build/singular-*/src/factory/ I think)?
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