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GCC: Check if AR works with --plugin and rc

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AR from older binutils doesn't work with --plugin and rc:

[hjl@gnu-cfl-2 bin]$ touch foo.c
[hjl@gnu-cfl-2 bin]$ ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c
[hjl@gnu-cfl-2 bin]$ ./ar --plugin /usr/libexec/gcc/x86_64-redhat-linux/10/liblto_plugin.so rc libfoo.a foo.c
./ar: no operation specified
[hjl@gnu-cfl-2 bin]$ ./ar --version
GNU ar (Linux/GNU Binutils) 2.29.51.0.1.20180112
Copyright (C) 2018 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) any later version.
This program has absolutely no warranty.
[hjl@gnu-cfl-2 bin]$

Check if AR works with --plugin and rc before passing --plugin to AR and
RANLIB.

	PR ld/27173
	* configure: Regenerated.
	* libtool.m4 (_LT_CMD_OLD_ARCHIVE): Check if AR works with
	--plugin and rc before enabling --plugin.

config/

	PR ld/27173
	* gcc-plugin.m4 (GCC_PLUGIN_OPTION): Check if AR works with
	--plugin and rc before enabling --plugin.

libiberty/

	PR ld/27173
	* configure: Regenerated.

zlib/

	PR ld/27173
	* configure: Regenerated.
This commit is contained in:
H.J. Lu
2021-01-11 16:26:39 -08:00
parent eabdd87b2e
commit 03c02f3116
9 changed files with 260 additions and 4 deletions
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9
libtool.m4 vendored
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@ -1340,7 +1340,14 @@ AC_CHECK_TOOL(AR, ar, false)
test -z "$AR" && AR=ar
if test -n "$plugin_option"; then
if $AR --help 2>&1 | grep -q "\--plugin"; then
AR="$AR $plugin_option"
touch conftest.c
$AR $plugin_option rc conftest.a conftest.c
if test "$?" != 0; then
AC_MSG_WARN([Failed: $AR $plugin_option rc])
else
AR="$AR $plugin_option"
fi
rm -f conftest.*
fi
fi
test -z "$AR_FLAGS" && AR_FLAGS=cru