diff options
| -rw-r--r-- | ChangeLog | 21 | ||||
| -rwxr-xr-x | configure | 190 | ||||
| -rw-r--r-- | configure.ac | 31 |
3 files changed, 141 insertions, 101 deletions
@@ -1,3 +1,24 @@ +2010-05-26 Dave Korn <dave.korn.cygwin@gmail.com> + + Merge from gcc: + + 2010-05-18 Steven Bosscher <steven@gcc.gnu.org> + * configure.ac (--enable-lto): All *-apple-darwin* now support LTO. + * configure: Regenerate. + + 2010-05-07 Steven Bosscher <steven@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@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. + 2010-04-27 Roland McGrath <roland@redhat.com> H.J. Lu <hongjiu.lu@intel.com> @@ -5995,95 +5995,7 @@ fi - - -target_elf=no -case $target in - *-darwin* | *-aix* | *-cygwin* | *-mingw* | *-aout* | *-*coff* | \ - *-msdosdjgpp* | *-netware* | *-vms* | *-wince* | *-*-pe* | \ - alpha*-dec-osf* | *-interix*) - target_elf=no - ;; - *) - target_elf=yes - ;; -esac - -if test $target_elf = yes; then : - -else - if test x"$default_enable_lto" = x"yes" ; then - enable_lto=no -else - if test x"$enable_lto" = x"yes"; then - as_fn_error "LTO support requires an ELF target." "$LINENO" 5 - fi -fi -default_enable_lto=no -fi - - -if test x"$enable_lto" = x"yes" ; then - # Make sure that libelf.h and gelf.h are available. - -# Check whether --with-libelf was given. -if test "${with_libelf+set}" = set; then : - withval=$with_libelf; -fi - - - -# Check whether --with-libelf_include was given. -if test "${with_libelf_include+set}" = set; then : - withval=$with_libelf_include; -fi - - - -# Check whether --with-libelf_lib was given. -if test "${with_libelf_lib+set}" = set; then : - withval=$with_libelf_lib; -fi - - - saved_CFLAGS="$CFLAGS" - saved_CPPFLAGS="$CPPFLAGS" - saved_LIBS="$LIBS" - - case $with_libelf in - "") - libelflibs="-lelf" - libelfinc="-I/usr/include/libelf" - ;; - *) - libelflibs="-L$with_libelf/lib -lelf" - libelfinc="-I$with_libelf/include -I$with_libelf/include/libelf" - LIBS="$libelflibs $LIBS" - ;; - esac - - if test "x$with_libelf_include" != x; then - libelfinc="-I$with_libelf_include" - fi - - if test "x$with_libelf_lib" != x; then - libelflibs="-L$with_libelf_lib -lelf" - LIBS="$libelflibs $LIBS" - fi - - if test "x$with_libelf$with_libelf_include$with_libelf_lib" = x \ - && test -d ${srcdir}/libelf; then - libelflibs='-L$$r/$(HOST_SUBDIR)/libelf/lib -lelf ' - libelfinc='-D__LIBELF_INTERNAL__ -I$$r/$(HOST_SUBDIR)/libelf/lib -I$$s/libelf/lib' - LIBS="$libelflibs $LIBS" - - else - - CFLAGS="$CFLAGS $libelfinc" - CPPFLAGS="$CPPFLAGS $libelfinc" - LIBS="$LIBS $libelflibs" - - ac_ext=c +ac_ext=c ac_cpp='$CPP $CPPFLAGS' ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5' ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS >&5' @@ -6481,7 +6393,83 @@ fi done -for ac_header in libelf.h + + + +target_elf=no +case $target in + *-darwin* | *-aix* | *-cygwin* | *-mingw* | *-aout* | *-*coff* | \ + *-msdosdjgpp* | *-netware* | *-vms* | *-wince* | *-*-pe* | \ + alpha*-dec-osf* | *-interix*) + target_elf=no + ;; + *) + target_elf=yes + ;; +esac + +if test $target_elf = yes; then : + if test x"$enable_lto" = x"yes" ; then + # Make sure that libelf.h and gelf.h are available. + +# Check whether --with-libelf was given. +if test "${with_libelf+set}" = set; then : + withval=$with_libelf; +fi + + + +# Check whether --with-libelf_include was given. +if test "${with_libelf_include+set}" = set; then : + withval=$with_libelf_include; +fi + + + +# Check whether --with-libelf_lib was given. +if test "${with_libelf_lib+set}" = set; then : + withval=$with_libelf_lib; +fi + + + saved_CFLAGS="$CFLAGS" + saved_CPPFLAGS="$CPPFLAGS" + saved_LIBS="$LIBS" + + case $with_libelf in + "") + libelflibs="-lelf" + libelfinc="-I/usr/include/libelf" + ;; + *) + libelflibs="-L$with_libelf/lib -lelf" + libelfinc="-I$with_libelf/include -I$with_libelf/include/libelf" + LIBS="$libelflibs $LIBS" + ;; + esac + + if test "x$with_libelf_include" != x; then + libelfinc="-I$with_libelf_include" + fi + + if test "x$with_libelf_lib" != x; then + libelflibs="-L$with_libelf_lib -lelf" + LIBS="$libelflibs $LIBS" + fi + + if test "x$with_libelf$with_libelf_include$with_libelf_lib" = x \ + && test -d ${srcdir}/libelf; then + libelflibs='-L$$r/$(HOST_SUBDIR)/libelf/lib -lelf ' + libelfinc='-D__LIBELF_INTERNAL__ -I$$r/$(HOST_SUBDIR)/libelf/lib -I$$s/libelf/lib' + LIBS="$libelflibs $LIBS" + + else + + CFLAGS="$CFLAGS $libelfinc" + CPPFLAGS="$CPPFLAGS $libelfinc" + LIBS="$LIBS $libelflibs" + + for ac_header in libelf.h do : ac_fn_c_check_header_mongrel "$LINENO" "libelf.h" "ac_cv_header_libelf_h" "$ac_includes_default" if test "x$ac_cv_header_libelf_h" = x""yes; then : @@ -6612,6 +6600,28 @@ to specify its location." "$LINENO" 5 fi +else + if test x"$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 + as_fn_error "LTO support is not enabled for this target." "$LINENO" 5 + fi + ;; + esac + fi + default_enable_lto=no +fi + # By default, C is the only stage 1 language. diff --git a/configure.ac b/configure.ac index 6d3390a..507ab54 100644 --- a/configure.ac +++ b/configure.ac @@ -1651,17 +1651,8 @@ AC_ARG_ENABLE(lto, enable_lto=$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. |