https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65559
--- Comment #33 from Matt Breedlove <breedlove.matt at gmail dot com> ---
bootstrap-lto fails to build:
`isl_union_map_read_from_str' referenced in section `.text' of
M:\msys64\tmp\cceOtKWH.ltrans0.ltrans.o: defined in discarded section `.text'
of isl_input.o (symbol from plugin)
`isl_union_map_read_from_str' referenced in section `.text' of
M:\msys64\tmp\cceOtKWH.ltrans0.ltrans.o: defined in discarded section `.text'
of isl_input.o (symbol from plugin)
`isl_union_map_copy' referenced in section `.text' of
M:\msys64\tmp\cceOtKWH.ltrans0.ltrans.o: defined in discarded section
...
Replacing the lto-wrapper with the one from my previous build makes these
errors disappear. The patch from my previous build was the following:
--- gcc-5.1.0/gcc/lto-wrapper.c.orig 2015-05-01 16:38:03.348243300 -0400
+++ gcc-5.1.0/gcc/lto-wrapper.c 2015-05-02 00:30:58.345729900 -0400
@@ -934,7 +934,7 @@
filename[p - argv[i]] = '\0';
file_offset = (off_t) loffset;
}
- fd = open (argv[i], O_RDONLY);
+ fd = open (filename, O_RDONLY|O_BINARY);
if (fd == -1)
{
lto_argv[lto_argc++] = argv[i];
Rainer hasn't tested this yet. I'm going to do a full native bootstrap-lto
with this, however it was working fine on everything else I compiled. The
issue with the last tested patch was archive files with offsets were getting
discarded from the build since we were back to not using the parsed archive
filename.
