Hi all, Since patch [1] has been applied, that is in GCC 4.7, it's not possible to build a tri-arch GCC (o32, n32, 64), using mips-linux-gnu as the host triplet (that is defaulting to o32). In that case mips/t-tpbit is not included anymore, and while the build succeeds, the resulting libgcc_s.so.1 has the following functions as undefined:
1697: 000000000004d940 0 FUNC GLOBAL DEFAULT UND __trunctfsf2 1698: 000000000004d930 0 FUNC GLOBAL DEFAULT UND __subtf3 1699: 000000000004d920 0 FUNC GLOBAL DEFAULT UND __floatsitf 1704: 000000000004d900 0 FUNC GLOBAL DEFAULT UND __fixunstfsi 1716: 000000000004d8f0 0 FUNC GLOBAL DEFAULT UND __lttf2 1722: 000000000004d8d0 0 FUNC GLOBAL DEFAULT UND __trunctfdf2 1728: 000000000004d880 0 FUNC GLOBAL DEFAULT UND __divtf3 1731: 000000000004d860 0 FUNC GLOBAL DEFAULT UND __addtf3 1737: 000000000004d830 0 FUNC GLOBAL DEFAULT UND __netf2 1746: 000000000004d800 0 FUNC GLOBAL DEFAULT UND __floatunsitf 1747: 000000000004d7f0 0 FUNC GLOBAL DEFAULT UND __eqtf2 1751: 000000000004d7d0 0 FUNC GLOBAL DEFAULT UND __multf3 The patch below fixes that by including mips/t-tpbit when long double is 16 bytes long, instead of detecting that using the host triplet. Aurelien [1] http://gcc.gnu.org/ml/gcc-patches/2011-07/msg00927.html 2012-04-28 Aurelien Jarno <aurel...@aurel32.net> * config.host (mips64*-*-linux*, mipsisa64*-*-linux*): Remove. (mips*-*-linux*): Include mips/t-tpbit when long double is 16 bytes long. Index: libgcc/config.host =================================================================== --- libgcc/config.host (révision 186921) +++ libgcc/config.host (copie de travail) @@ -728,15 +728,13 @@ ;; mips*-*-netbsd*) # NetBSD/mips, either endian. ;; -mips64*-*-linux* | mipsisa64*-*-linux*) - extra_parts="$extra_parts crtfastmath.o" - tmake_file="${tmake_file} t-crtfm mips/t-mips16 mips/t-tpbit" - md_unwind_header=mips/linux-unwind.h - ;; mips*-*-linux*) # Linux MIPS, either endian. extra_parts="$extra_parts crtfastmath.o" tmake_file="${tmake_file} t-crtfm mips/t-mips16" md_unwind_header=mips/linux-unwind.h + if test "${ac_cv_sizeof_long_double}" = 16; then + tmake_file="${tmake_file} mips/t-tpbit" + fi ;; mips*-sde-elf*) tmake_file="$tmake_file mips/t-crtstuff mips/t-mips16" -- Aurelien Jarno GPG: 1024D/F1BCDB73 aurel...@aurel32.net http://www.aurel32.net
