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the toplevel configure.ac currently does: CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}} CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CFLAGS}} LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${CFLAGS}} there's two things wrong here ... first, the default for CXXFLAGS/LDFLAGS should be CXXFLAGS/LDFLAGS, not CFLAGS. the other is that FOR_BUILD variables should not default to the host flags if $host != $build. the program FOR_BUILD variables (like AR/RANLIB/etc...) already test this, but the *FLAGS do not. so if you try to build like: CFLAGS="-m4" ./configure --build=x86_64-... --host=sh4-... --target=sh4-... it'll fail if any build binaries need to be compiled (like the "chew" binary in bfd/doc/). the attached patch should rectify both of these issues. -mike 2007-10-06 Mike Frysinger <vapier@gentoo.org> * configure.ac (CFLAGS_FOR_BUILD, CXXFLAGS_FOR_BUILD, LDFLAGS_FOR_BUILD): Default them to host flags only for $host = $build. Set default CXXFLAGS_FOR_BUILD to CXXFLAGS, not CFLAGS. Set default LDFLAGS_FOR_BUILD to LDFLAGS, not CFLAGS. * configure: Regenerate.
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2007-10-06 Mike Frysinger <vapier@gentoo.org> * configure.ac (CFLAGS_FOR_BUILD, CXXFLAGS_FOR_BUILD, LDFLAGS_FOR_BUILD): Default them to host flags only for $host = $build. Set default CXXFLAGS_FOR_BUILD to CXXFLAGS, not CFLAGS. Set default LDFLAGS_FOR_BUILD to LDFLAGS, not CFLAGS. * configure: Regenerate. --- configure.ac 1 Oct 2007 07:55:47 -0000 1.30 +++ configure.ac 6 Oct 2007 23:06:00 -0000 @@ -2387,9 +2387,11 @@ esac # Allow the user to override the flags for # our build compiler if desired. -CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}} -CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CFLAGS}} -LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${CFLAGS}} +if test x"${build}" = x"${host}" ; then + CFLAGS_FOR_BUILD=${CFLAGS_FOR_BUILD-${CFLAGS}} + CXXFLAGS_FOR_BUILD=${CXXFLAGS_FOR_BUILD-${CXXFLAGS}} + LDFLAGS_FOR_BUILD=${LDFLAGS_FOR_BUILD-${LDFLAGS}} +fi # On Canadian crosses, we'll be searching the right directories for # the previously-installed cross compiler, so don't bother to add
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