It seems that at least when cross-compiling at least collect2 pulls
in objects from libbacktrace.a which is linked via LIBDEPS. But
libbacktrace for the host is only built -fPIC with --enable-host-shared
but not -fPIE with --enable-host-pie so this fails. The following
teaches libbacktrace about --enable-host-pie and handles it similar
to libcpp.
PR bootstrap/119680
libbacktrace/
* configure.ac (--enable-host-pie): Handle by setting PIC_FLAG
to -fPIE.
* configure: Regenerate.
Patch from pgerell@github.
* elf.c (elf_fetch_bits): Add casts to avoid potentially shifting
a value farther than its type size.
(elf_fetch_bits_backward): Likewise.
(elf_uncompress_lzma_block): Likewise.
(elf_uncompress_lzma): Likewise.
Older versions of the Arm architecture lack support for __sync
operations directly in hardware and require calls into appropriate
operating-system hooks. But such hooks obviously don't exist in a
freestanding environment.
Consquently, it is incorrect to assume during configure that such
functions will exist and we need a configure-time check to determine
whether or not these routines will work.
libbacktrace:
* configure.ac: Always check if the compiler supports __sync
operations.
* configure: Regenerated.
PR 117812 reports that testing GCC with zstd 1.3.4 fails because
ZSTD_CLEVEL_DEFAULT is not defined, so avoid using it.
PR libbacktrace/117812
* zstdtest.c (test_large): Use 3 rather than ZSTD_CLEVEL_DEFAULT
Also convert some FALLTHROUGH comments to ATTRIBUTE_FALLTHROUGH.
* internal.h: Use __has_attribute to check for fallthrough
attribute.
* elf.c (elf_zstd_decompress): Use ATTRIBUTE_FALLTHROUGH rather
than a FALLTHROUGH comment.
We could get an infinite recursion in an odd case in which a
.gnu_debugdata section was added to a debug file, and mini_debuginfo
was put into the debug file, and the debug file was put into a
/usr/lib/debug directory to be found by build ID. This combination
doesn't really make sense but we shouldn't get an infinite recursion.
* elf.c (elf_add): Don't use .gnu_debugdata if we are already
reading a debuginfo file.
* Makefile.am (m2test_*): New test targets.
(CHECK_PROGRAMS): Add m2test.
(MAKETESTS): Add m2test_minidebug2.
(%_minidebug2): New pattern.
(CLEANFILES): Remove minidebug2 files.
* Makefile.in: Regenerate.
Patch from Björn Schäpers <bjoern@hazardy.de>.
* configure.ac: Checked for tlhelp32.h
* pecoff.c: Include <tlhelp32.h> if available.
(backtrace_initialize): Use tlhelp32 api for a snapshot to
detect loaded modules.
(coff_add): New argument for the module handle of the file,
to get the base address.
* configure, config.h.in: Regenerate.
This should fix a testsuite problem with Solaris ld that supports zlib
but not zlib-gabi.
* configure.ac: Test --compress-debug-sections=zlib-gnu and
--compress-debug-sections=zlib-gabi separately, setting new
automake conditionals.
* Makefile.am (ctestg, ctestg_alloc): Only build if
HAVE_COMPRESSED_DEBUG_ZLIB_GNU.
(ctesta, ctesta_alloc): Only build if
HAVE_COMPRESSED_DEBUG_ZLIB_GABI.
(ctestzstd_alloc): New test if HAVE_COMPRESSED_DEBUG_ZSTD.
* configure, Makefile.in: Regenerate.
