properly fix mpfr to restore clang usage

[howarth@…]

The breakage in mpfr with the Xcode 4.2.0 release was mishandled in macports. The actual cause of the breakage was due to a clang bug which was exposed in when tis support was enabled in clang in the Xcode 4.2.0 release. The mpfr 3.1.0 release tickles this bug because it supports tis if present in the compiler. The possible fixes for this problem is either to require Xcode 4.2.1 or later which has this tis code generation bug fixed,

radr://10291355, "Xcode 4.2 miscompiles tls support in MPFR 3.1.0"

by back porting the fix from llvm.org (r142553 ) for the same issue...

​http://llvm.org/bugs/show_bug.cgi?id=11111

The attached Portfile.diff fixes this issue as we have in fink by passing --disable-thread-safe to configure. This has no impact on the build with non-clang compilers as none of them have ever supported tis code generation. For clang, it restores the previous build behavior prior to Xcode 4.2.0 where tis support wasn't available.

Testing on x86_64-apple-darwin11 with Xcode 4.3 shows...

/usr/bin/make check-TESTS [tversion] GMP: header 5.0.4, library 5.0.4 [tversion] MPFR tuning parameters from src/x86_64/core2/mparam.h PASS: tversion PASS: tinternals PASS: tinits PASS: tisqrt PASS: tsgn PASS: tcheck PASS: tisnan PASS: texceptions PASS: tset_exp PASS: tset PASS: mpf_compat PASS: mpfr_compat PASS: reuse PASS: tabs PASS: tacos PASS: tacosh PASS: tadd PASS: tadd1sp PASS: tadd_d PASS: tadd_ui PASS: tagm PASS: tai PASS: tasin PASS: tasinh PASS: tatan PASS: tatanh PASS: taway PASS: tbuildopt PASS: tcan_round PASS: tcbrt PASS: tcmp PASS: tcmp2 PASS: tcmp_d PASS: tcmp_ld PASS: tcmp_ui PASS: tcmpabs PASS: tcomparisons PASS: tconst_catalan PASS: tconst_euler PASS: tconst_log2 PASS: tconst_pi PASS: tcopysign PASS: tcos PASS: tcosh PASS: tcot PASS: tcoth PASS: tcsc PASS: tcsch PASS: td_div PASS: td_sub PASS: tdigamma PASS: tdim PASS: tdiv PASS: tdiv_d PASS: tdiv_ui PASS: teint PASS: teq PASS: terf PASS: texp PASS: texp10 PASS: texp2 PASS: texpm1 PASS: tfactorial PASS: tfits PASS: tfma PASS: tfmod PASS: tfms PASS: tfprintf PASS: tfrac PASS: tfrexp PASS: tgamma PASS: tget_flt PASS: tget_d PASS: tget_d_2exp PASS: tget_f PASS: tget_ld_2exp SKIP: tget_set_d64 PASS: tget_sj PASS: tget_str PASS: tget_z PASS: tgmpop PASS: tgrandom PASS: thyperbolic PASS: thypot PASS: tinp_str PASS: tj0 PASS: tj1 PASS: tjn PASS: tl2b PASS: tlgamma PASS: tli2 PASS: tlngamma PASS: tlog PASS: tlog10 PASS: tlog1p PASS: tlog2 PASS: tmin_prec PASS: tminmax PASS: tmodf PASS: tmul PASS: tmul_2exp PASS: tmul_d PASS: tmul_ui PASS: tnext PASS: tout_str PASS: toutimpl PASS: tpow PASS: tpow3 PASS: tpow_all PASS: tpow_z PASS: tprintf PASS: trandom PASS: trec_sqrt PASS: tremquo PASS: trint PASS: troot PASS: tround_prec PASS: tsec PASS: tsech PASS: tset_d PASS: tset_f PASS: tset_ld PASS: tset_q PASS: tset_si PASS: tset_sj PASS: tset_str PASS: tset_z PASS: tset_z_exp PASS: tsi_op PASS: tsin PASS: tsin_cos PASS: tsinh PASS: tsinh_cosh PASS: tsprintf PASS: tsqr PASS: tsqrt PASS: tsqrt_ui PASS: tstckintc PASS: tstdint PASS: tstrtofr PASS: tsub PASS: tsub1sp PASS: tsub_d PASS: tsub_ui PASS: tsubnormal PASS: tsum PASS: tswap PASS: ttan PASS: ttanh PASS: ttrunc PASS: tui_div PASS: tui_pow PASS: tui_sub PASS: turandom PASS: tvalist PASS: ty0 PASS: ty1 PASS: tyn PASS: tzeta PASS: tzeta_ui [tversion] GMP: header 5.0.4, library 5.0.4 [tversion] MPFR tuning parameters from src/x86_64/core2/mparam.h PASS: tversion ==================== All 160 tests passed (1 test was not run) ==================== Making check in tune

[howarth@…]

Portfile.diff with better fix for Xcode 4.2.0 clang code generation issue in mpfr