aboutsummaryrefslogtreecommitdiff
path: root/config
diff options
context:
space:
mode:
authorFangrui Song <maskray@google.com>2022-09-26 19:50:13 -0700
committerFangrui Song <i@maskray.me>2022-09-26 19:50:13 -0700
commit2cac01e3ffff74898c54fa5e6418817f5578adb6 (patch)
treec0209ba03d922dae339056488493fc16ebefe6d0 /config
parente122316b7ce78b999db944d7b524e11d642e2a49 (diff)
downloadgdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.zip
gdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.tar.gz
gdb-2cac01e3ffff74898c54fa5e6418817f5578adb6.tar.bz2
binutils, gdb: support zstd compressed debug sections
PR29397 PR29563: Add new configure option --with-zstd which defaults to auto. If pkgconfig/libzstd.pc is found, define HAVE_ZSTD and support zstd compressed debug sections for most tools. * bfd: for addr2line, objdump --dwarf, gdb, etc * gas: support --compress-debug-sections=zstd * ld: support ELFCOMPRESS_ZSTD input and --compress-debug-sections=zstd * objcopy: support ELFCOMPRESS_ZSTD input for --decompress-debug-sections and --compress-debug-sections=zstd * gdb: support ELFCOMPRESS_ZSTD input. The bfd change references zstd symbols, so gdb has to link against -lzstd in this patch. If zstd is not supported, ELFCOMPRESS_ZSTD input triggers an error. We can avoid HAVE_ZSTD if binutils-gdb imports zstd/ like zlib/, but this is too heavyweight, so don't do it for now. ``` % ld/ld-new a.o ld/ld-new: a.o: section .debug_abbrev is compressed with zstd, but BFD is not built with zstd support ... % ld/ld-new a.o --compress-debug-sections=zstd ld/ld-new: --compress-debug-sections=zstd: ld is not built with zstd support % binutils/objcopy --compress-debug-sections=zstd a.o b.o binutils/objcopy: --compress-debug-sections=zstd: binutils is not built with zstd support % binutils/objcopy b.o --decompress-debug-sections binutils/objcopy: zstd.o: section .debug_abbrev is compressed with zstd, but BFD is not built with zstd support ... ```
Diffstat (limited to 'config')
-rw-r--r--config/zstd.m423
1 files changed, 23 insertions, 0 deletions
diff --git a/config/zstd.m4 b/config/zstd.m4
new file mode 100644
index 0000000..6da4db6
--- /dev/null
+++ b/config/zstd.m4
@@ -0,0 +1,23 @@
+dnl Copyright (C) 2022 Free Software Foundation, Inc.
+dnl This file is free software, distributed under the terms of the GNU
+dnl General Public License. As a special exception to the GNU General
+dnl Public License, this file may be distributed as part of a program
+dnl that contains a configuration script generated by Autoconf, under
+dnl the same distribution terms as the rest of that program.
+
+dnl Enable features using the zstd library.
+AC_DEFUN([AC_ZSTD], [
+AC_ARG_WITH(zstd,
+ [AS_HELP_STRING([--with-zstd], [support zstd compressed debug sections (default=auto)])],
+ [], [with_zstd=auto])
+
+AS_IF([test "$with_zstd" != no],
+ [PKG_CHECK_MODULES(ZSTD, [libzstd], [
+ AC_DEFINE(HAVE_ZSTD, 1, [Define to 1 if zstd is enabled.])
+ ], [
+ if test "$with_zstd" = yes; then
+ AC_MSG_ERROR([--with-zstd was given, but pkgconfig/libzstd.pc is not found])
+ fi
+ ])
+ ])
+])