https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89494
--- Comment #30 from Piotr Kubaj <pkubaj at anongoth dot pl> --- With default flags: during RTL pass: cprop_hardreg In file included from /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libgcc/unwind-c.c:32: /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libgcc/unwind-pe.h: In function 'base_of_encoded_value': /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libgcc/unwind-pe.h:121:1: internal compiler error: Segmentation fault With my hack that allows gcc9 to build: during RTL pass: reload In file included from /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libiberty/regex.c:639: /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libiberty/regex.c: In function 'byte_regex_compile': /wrkdirs/usr/ports/lang/gcc10-devel/work/gcc-10-20210327/libiberty/regex.c:4223:1: internal compiler error: Segmentation fault 4223 | } /* regex_compile */ The hack is: CFLAGS_FOR_TARGET="-O0" CXXFLAGS_FOR_TARGET="-O0" BOOT_CFLAGS="-O0" And the patch: --- libgcc/config/rs6000/t-crtstuff.orig 2020-04-07 15:17:50 UTC +++ libgcc/config/rs6000/t-crtstuff @@ -3,4 +3,4 @@ # Do not build crtend.o with -Os as that can result in references to # out-of-line register save/restore functions, which may be unresolved # as crtend.o is linked after libgcc.a. See PR45053. -CRTSTUFF_T_CFLAGS = -msdata=none -O2 -fno-asynchronous-unwind-tables +CRTSTUFF_T_CFLAGS = -msdata=none -O0 -fno-asynchronous-unwind-tables
