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| author | Dave Korn <dave.korn@artimi.com> | 2010-05-26 05:16:31 +0000 |
|---|---|---|
| committer | Dave Korn <dave.korn@artimi.com> | 2010-05-26 05:16:31 +0000 |
| commit | e49e5c9230523b20b6560022c5cdfd3665065d20 (patch) | |
| tree | 02ef98dd932d4424591fac114dac6ae0c0e6e17c /configure.ac | |
| parent | 5c3885291ffdae7d69304eafb03507a5ba384a5c (diff) | |
| download | binutils-gdb-e49e5c9230523b20b6560022c5cdfd3665065d20.tar.gz | |
Merge from gcc:
2010-05-18 Steven Bosscher <steven AT gcc.gnu.org>
* configure.ac (--enable-lto): All *-apple-darwin* now support LTO.
* configure: Regenerate.
2010-05-07 Steven Bosscher <steven AT gcc.gnu.org>
* configure.ac (--enable-lto): Add x86_64-apple-darwin* as
a platform that supports LTO.
* configure: Regenerate.
2010-04-27 Dave Korn <dave.korn.cygwin AT gmail.com>
PR lto/42776
* configure.ac (--enable-lto): Refactor handling so libelf tests
are only performed inside then-clause of ACX_ELF_TARGET_IFELSE,
and allow LTO to be explicitly enabled on non-ELF platforms that
are known to support it inside else-clause.
* configure: Regenerate.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 31 |
1 files changed, 20 insertions, 11 deletions
diff --git a/configure.ac b/configure.ac index 6d3390a737d..507ab547b53 100644 --- a/configure.ac +++ b/configure.ac @@ -1651,17 +1651,8 @@ AC_ARG_ENABLE(lto, enable_lto=$enableval, enable_lto=yes; default_enable_lto=yes) -ACX_ELF_TARGET_IFELSE([], -if test x"$default_enable_lto" = x"yes" ; then - enable_lto=no -else - if test x"$enable_lto" = x"yes"; then - AC_MSG_ERROR([LTO support requires an ELF target.]) - fi -fi -default_enable_lto=no) -if test x"$enable_lto" = x"yes" ; then +ACX_ELF_TARGET_IFELSE([if test x"$enable_lto" = x"yes" ; then # Make sure that libelf.h and gelf.h are available. AC_ARG_WITH(libelf, [ --with-libelf=PATH Specify prefix directory for the installed libelf package Equivalent to --with-libelf-include=PATH/include @@ -1777,7 +1768,25 @@ to specify its location.]) # Flags needed for libelf. AC_SUBST(libelflibs) AC_SUBST(libelfinc) -fi +fi],[if test x"$default_enable_lto" = x"yes" ; then + # On non-ELF platforms, LTO must be explicitly enabled. + enable_lto=no + else + # Apart from ELF platforms, only Windows supports LTO so far. It + # would also be nice to check the binutils support, but we don't + # have gcc_GAS_CHECK_FEATURE available here. For now, we'll just + # warn during gcc/ subconfigure; unless you're bootstrapping with + # -flto it won't be needed until after installation anyway. + case $target in + *-cygwin*|*-mingw*) ;; + *-apple-darwin*) ;; + *) if test x"$enable_lto" = x"yes"; then + AC_MSG_ERROR([LTO support is not enabled for this target.]) + fi + ;; + esac + fi + default_enable_lto=no]) # By default, C is the only stage 1 language. |