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2cac01e3ff
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 ... ```
24 lines
882 B
Plaintext
24 lines
882 B
Plaintext
dnl Copyright (C) 2022 Free Software Foundation, Inc.
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dnl This file is free software, distributed under the terms of the GNU
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dnl General Public License. As a special exception to the GNU General
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dnl Public License, this file may be distributed as part of a program
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dnl that contains a configuration script generated by Autoconf, under
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dnl the same distribution terms as the rest of that program.
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dnl Enable features using the zstd library.
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AC_DEFUN([AC_ZSTD], [
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AC_ARG_WITH(zstd,
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[AS_HELP_STRING([--with-zstd], [support zstd compressed debug sections (default=auto)])],
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[], [with_zstd=auto])
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AS_IF([test "$with_zstd" != no],
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[PKG_CHECK_MODULES(ZSTD, [libzstd], [
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AC_DEFINE(HAVE_ZSTD, 1, [Define to 1 if zstd is enabled.])
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], [
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if test "$with_zstd" = yes; then
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AC_MSG_ERROR([--with-zstd was given, but pkgconfig/libzstd.pc is not found])
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fi
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])
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])
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])
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