@@ -183,6 +183,9 @@ Driver JoinedOrMissing Alias(print-file-name=)
-print-libgcc-file-name
Driver Alias(print-libgcc-file-name)
+-print-lto-plugin
+Driver Alias(print-lto-plugin)
+
-print-multi-directory
Driver Alias(print-multi-directory)
@@ -1932,6 +1935,9 @@ Driver JoinedOrMissing Var(print_file_name)
print-libgcc-file-name
Driver
+print-lto-plugin
+Driver Var(print_lto_plugin)
+
print-multi-directory
Driver Var(print_multi_directory)
@@ -322,7 +322,7 @@ Objective-C and Objective-C++ Dialects}.
-fdebug-prefix-map=@var{old}=@var{new} @gol
-femit-struct-debug-baseonly -femit-struct-debug-reduced @gol
-femit-struct-debug-detailed@r{[}=@var{spec-list}@r{]} @gol
--p -pg -print-file-name=@var{library} -print-libgcc-file-name @gol
+-p -pg -print-file-name=@var{library} -print-libgcc-file-name -print-lto-plugin @gol
-print-multi-directory -print-multi-lib -print-multi-os-directory @gol
-print-prog-name=@var{program} -print-search-dirs -Q @gol
-print-sysroot -print-sysroot-headers-suffix @gol
@@ -5725,6 +5725,13 @@ Same as @option{-print-file-name=libgcc.a}.
This is useful when you use @option{-nostdlib} or @option{-nodefaultlibs}
but you do want to link with @file{libgcc.a}. You can do
+@item -print-lto-plugin
+@opindex print-lto-plugin
+Print the path name of the LTO linker plugin used by the compiler.
+
+This is useful to pass to ar, gold, ld or other binutils with linker
+plugin support.
+
@smallexample
gcc -nostdlib @var{files}@dots{} `gcc -print-libgcc-file-name`
@end smallexample
@@ -2928,6 +2928,7 @@ display_help (void)
fputs (_(" -dumpmachine Display the compiler's target processor\n"), stdout);
fputs (_(" -print-search-dirs Display the directories in the compiler's search path\n"), stdout);
fputs (_(" -print-libgcc-file-name Display the name of the compiler's companion library\n"), stdout);
+ fputs (_(" -print-lto-plugin Display the name of the compiler's LTO plugin\n"), stdout);
fputs (_(" -print-file-name=<lib> Display the full path to library <lib>\n"), stdout);
fputs (_(" -print-prog-name=<prog> Display the full path to compiler component <prog>\n"), stdout);
fputs (_(" -print-multi-directory Display the root directory for versions of libgcc\n"), stdout);
@@ -3222,6 +3223,7 @@ driver_handle_option (struct gcc_options *opts,
case OPT_print_sysroot:
case OPT_print_multi_os_directory:
case OPT_print_sysroot_headers_suffix:
+ case OPT_print_lto_plugin:
case OPT_time:
case OPT_wrapper:
/* These options set the variables specified in common.opt
@@ -6536,6 +6538,17 @@ main (int argc, char **argv)
fatal_error ("not configured with sysroot headers suffix");
}
+ if (print_lto_plugin)
+ {
+ char *plugin;
+
+ plugin = find_a_file (&exec_prefixes, "liblto_plugin.so", R_OK, false);
+ if (!plugin)
+ fatal_error ("-print-lto-plugin specified, but no plugin found");
+ printf ("%s\n", plugin);
+ return (0);
+ }
+
if (print_help_list)
{
display_help ();
From: Andi Kleen <ak@linux.intel.com> binutils have LTO linker plugin support now, but it requires hardcoding the path to gcc's libexec dir in the Makefile. Add an option to the gcc driver instead to print the full file name to avoid this. This is especially useful for ar or nm. gcc/ 2010-10-02 Andi Kleen <ak@linux.intel.com> * common.opt (-print-lto-plugin): Add. * doc/invoke.texi (-print-lto-plugin): Document. * gcc.c (display_help): Describe -print-lto-plugin. (main.c): Handle print_lto_plugin. --- gcc/common.opt | 6 ++++++ gcc/doc/invoke.texi | 9 ++++++++- gcc/gcc.c | 13 +++++++++++++ 3 files changed, 27 insertions(+), 1 deletions(-)