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| author | tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-06-13 14:32:16 +0000 |
|---|---|---|
| committer | tschwinge <tschwinge@138bc75d-0d04-0410-961f-82ee72b054a4> | 2014-06-13 14:32:16 +0000 |
| commit | 1015a06374f096ebe57068dcb997d881f5af26b3 (patch) | |
| tree | e212e86d892a2b16bd0d28b485cffc6105c5c8db /gcc/doc/install.texi | |
| parent | bf0001d46560bfef90b4822ebde0e0fc4caeb817 (diff) | |
| download | gcc-1015a06374f096ebe57068dcb997d881f5af26b3.tar.gz | |
Non-host system configuration for linker plugins.
* configure.ac (--enable-linker-plugin-configure-flags)
(--enable-linker-plugin-flags): New flags.
(configdirs): Conditionally add libiberty-linker-plugin.
* configure: Regenerate.
* Makefile.def (host_modules): Add libiberty-linker-plugin.
(host_modules) <lto-plugin>: Pay attention to
@extra_linker_plugin_flags@ and
@extra_linker_plugin_configure_flags@.
(all-lto-plugin): Also depend on all-libiberty-linker-plugin.
* Makefile.in: Regenerate.
gcc/
* doc/install.texi (--enable-linker-plugin-configure-flags)
(--enable-linker-plugin-flags): Document new flags.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211644 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/doc/install.texi')
| -rw-r--r-- | gcc/doc/install.texi | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/doc/install.texi b/gcc/doc/install.texi index 7851b0061b3..c66217548e2 100644 --- a/gcc/doc/install.texi +++ b/gcc/doc/install.texi @@ -1780,6 +1780,25 @@ GLIBC 2.11 or above, otherwise disabled. Enable support for link-time optimization (LTO). This is enabled by default, and may be disabled using @option{--disable-lto}. +@item --enable-linker-plugin-configure-flags=FLAGS +@itemx --enable-linker-plugin-flags=FLAGS +By default, linker plugins (such as the LTO plugin) are built for the +host system architecture. For the case that the linker has a +different (but run-time compatible) architecture, these flags can be +specified to build plugins that are compatible to the linker. For +example, if you are building GCC for a 64-bit x86_64 +(@samp{x86_64-unknown-linux-gnu}) host system, but have a 32-bit x86 +GNU/Linux (@samp{i686-pc-linux-gnu}) linker executable (which is +executable on the former system), you can configure GCC as follows for +getting compatible linker plugins: + +@smallexample +% @var{srcdir}/configure \ + --host=x86_64-unknown-linux-gnu \ + --enable-linker-plugin-configure-flags=--host=i686-pc-linux-gnu \ + --enable-linker-plugin-flags='CC=gcc\ -m32\ -Wl,-rpath,[...]/i686-pc-linux-gnu/lib' +@end smallexample + @item --with-plugin-ld=@var{pathname} Enable an alternate linker to be used at link-time optimization (LTO) link time when @option{-fuse-linker-plugin} is enabled. |