See http://gcc.gnu.org/PR15068 Fixes error ../sysdeps/generic/s_fmax.c: In function `__fmax': ../sysdeps/generic/s_fmax.c:28: internal compiler error: in elim_reg_cond, at flow.c:3257 Please submit a full bug report, with preprocessed source if appropriate. See for instructions. make[2]: *** [/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/build-glibc/math/s_fmax.o] Error 1 make[2]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822/math' make[1]: *** [math/others] Error 2 make[1]: Leaving directory `/home/dank/wk/crosstool-0.28-rc35/build/arm-unknown-linux-gnu/gcc-3.4.1-glibc-20040822/glibc-20040822' make: *** [all] Error 2 [ rediffed against gcc-3.4.1, with elbow grease, ending up with same thing as http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/flow.c.diff?cvsroot=gcc&only_with_tag=csl-arm-branch&r1=1.563.4.2&r2=1.563.4.3 ] --- gcc-3.4.1/gcc/flow.c.old 2004-02-27 19:39:19.000000000 -0800 +++ gcc-3.4.1/gcc/flow.c 2004-08-26 07:29:46.000000000 -0700 @@ -1878,6 +1878,7 @@ rtx set_src = SET_SRC (pc_set (BB_END (bb))); rtx cond_true = XEXP (set_src, 0); rtx reg = XEXP (cond_true, 0); + enum rtx_code inv_cond; if (GET_CODE (reg) == SUBREG) reg = SUBREG_REG (reg); @@ -1886,11 +1887,13 @@ in the form of a comparison of a register against zero. If the condition is more complex than that, then it is safe not to record any information. */ - if (GET_CODE (reg) == REG + inv_cond = reversed_comparison_code (cond_true, BB_END (bb)); + if (inv_cond != UNKNOWN + && GET_CODE (reg) == REG && XEXP (cond_true, 1) == const0_rtx) { rtx cond_false - = gen_rtx_fmt_ee (reverse_condition (GET_CODE (cond_true)), + = gen_rtx_fmt_ee (inv_cond, GET_MODE (cond_true), XEXP (cond_true, 0), XEXP (cond_true, 1)); if (GET_CODE (XEXP (set_src, 1)) == PC)