I have compiled sucessfully GCC 4.5.0 under various systems (solaris, cygwin, darwin), using gmp-5.0.1, mpfr-2.4.2 and mpc-0.8.2 installed in the source tree before compilation.
I've tried recently a new MPFR Release Candidate 2 (from http://www.mpfr.org/mpfr-3.0.0/mpfr-3.0.0-rc2.tar.bz2) as a replacement for mpfr-2.4.2.tar.bz2. But It failed within stage 1 of mpfr, at least under darwin and solaris, with the following message: "header files gmp-impl.h and longlong.h not found" It seems: - that GCC compiles mpfr by passing the --with-gmp-build option to its configure, - that the new mpfr-3.0.0 now detects that the directory given under --with-gmp-build does not contain the necessary files and aborts in this case - that the same detection was performed under mpfr-2.4.2, albeit with no abort - the two missing header files are present in the source directory, but not in the build directory (the one given to --with-gmp-build) I then tried to patch the mpfr/configure in order to skip this test (and the following one "checking for valid GMP_NUMB_BITS"), and it seems to work: GCC is built, and i can use this GCC like before. However i cannot say whether the MPFR part is fully functioning or not. See also http://websympa.loria.fr/wwsympa/arc/mpfr/2010-06/msg00003.html (the french part of this message is summarized above). According to MPFR people, the bug would reside in GCC. Hope this helps (the future). NB. I categorized this problem as more severe as "Normal", since it is likely to affect many targets, and also affect all users that would want to upgrade (blindly) to the last MPFR (within the GCC source directory). -- Summary: GCC fails to build if MPFR 3.0.0 (Release Candidate) is used Product: gcc Version: 4.5.0 Status: UNCONFIRMED Severity: major Priority: P3 Component: bootstrap AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: Denis dot Excoffier at airbus dot com http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44455
