On Wed, 11 Dec 2013 23:11:46, Alan Modra wrote: > > On Wed, Dec 11, 2013 at 12:10:04PM +0100, Bernd Edlinger wrote: >> Hi, >> >> I'm having problems with that patch. > > Sorry to hear that. >
Never mind. I have similar patches, but I did not >> I try to start at X86_64-linux-gnu, and I want to get the GCC running on >> arm-linux-gnueabihf. >> I grabbed system headers and libraries from the target and put it in the >> prefix path. >> >> In the first step I do >> >> ../gcc-4.9-20131208/configure >> --prefix=/home/ed/gnu/arm-linux-gnueabihf-linux64 >> --target=arm-linux-gnueabihf --enable-languages=c,c++,fortran >> --with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3-d16 >> --with-float=hard >> >> This GCC runs on PC and generates arm-linux-gnueabihf executables. >> >> Then I try this >> >> ../gcc-4.9-20131208/configure >> --prefix=/home/ed/gnu/arm-linux-gnueabihf-cross --host=arm-linux-gnueabihf >> --target=arm-linux-gnueabihf --enable-languages=c,c++,fortran >> --with-arch=armv7-a --with-tune=cortex-a9 --with-fpu=vfpv3-d16 >> --with-float=hard >> >> But It fails because auto-build.h contains nonsense. That is probably >> because almost every check >> has a fatal error #include <gmp.h> not found. >> >> I personally prefer to have gmp, mpfr, mpc in-tree (using >> contrib/download_prerequisites). >> >> I experimented a bit and at least this attached patch improves the situation >> for me. >> >> Maybe I never had any problems with GMP before, because the in-tree >> configuration of GMP does -DNO_ASM ? > > GMPINC really shouldn't be used to find build headers, since it is used > to find host headers. See the top level Makefile.in. When gmp has > been installed, using GMPINC means you pull in a whole lot of host > headers for the build compiler. Which might work in rare cases, but > it's a lot more likely to fail. Even with in-tree gmp, how do you get > things like GMP_LIMB_BITS correct if your build machine is 64-bit and > your host is 32-bit? (Perhaps there is some build magic that allows > this to work, I'll investigate when I get back from vacation.) > I do not know, but until last week the only problem was a missing SSIZE_MAX in gcc/config/host-linux.c (glimits.h does not define this, and fix-include replaced mine!) We need the auto-build only to build something that translates .md files to .c, so I would'nt care about GMP, but some other things, like the right prototype for printf make a difference. now the auto-build.h has #define HAVE_DECL_SBRK 0 last week that was #define HAVE_DECL_SBRK 1 I can give you my sys-root files, and you can play with it if you like. > Incidentally, we've been using a couple of other patches for > build != host that I haven't posted because I wasn't sure who authored > them. It's possible the first one might help you. > > diff --git a/gcc/Makefile.in b/gcc/Makefile.in > index aad927c..7995e64 100644 > --- a/gcc/Makefile.in > +++ b/gcc/Makefile.in > @@ -747,7 +747,8 @@ BUILD_LINKERFLAGS = $(BUILD_CXXFLAGS) > > # Native linker and preprocessor flags. For x-fragment overrides. > BUILD_LDFLAGS=@BUILD_LDFLAGS@ > -BUILD_CPPFLAGS=$(ALL_CPPFLAGS) > +BUILD_CPPFLAGS= -I. -I$(@D) -I$(srcdir) -I$(srcdir)/$(@D) \ > + -I$(srcdir)/../include $(CPPINC) > I did not have this one. What is it good for? > # Actual name to use when installing a native compiler. > GCC_INSTALL_NAME := $(shell echo gcc|sed '$(program_transform_name)') > diff --git a/gcc/ada/gcc-interface/Make-lang.in > b/gcc/ada/gcc-interface/Make-lang.in > index 57f9009..e1d3ed6 100644 > --- a/gcc/ada/gcc-interface/Make-lang.in > +++ b/gcc/ada/gcc-interface/Make-lang.in > @@ -625,7 +625,7 @@ ada.tags: force > ada/doctools/xgnatugn$(build_exeext): ada/xgnatugn.adb > -$(MKDIR) ada/doctools > $(CP) $^ ada/doctools > - cd ada/doctools && $(GNATMAKE) -q xgnatugn > + cd ada/doctools && gnatmake -q xgnatugn > Yes, I also have that. It's a show-stopper for Ada. > # Note that doc/gnat_ugn.texi and doc/projects.texi do not depend on > # xgnatugn being built so we can distribute a pregenerated doc/gnat_ugn.info > diff --git a/gnattools/Makefile.in b/gnattools/Makefile.in > index 794d374..6b0d5e8 100644 > --- a/gnattools/Makefile.in > +++ b/gnattools/Makefile.in > @@ -23,6 +23,7 @@ SHELL = @SHELL@ > srcdir = @srcdir@ > libdir = @libdir@ > build = @build@ > +host = @host@ > target = @target@ > prefix = @prefix@ > INSTALL = @INSTALL@ > @@ -31,6 +32,7 @@ INSTALL_PROGRAM = @INSTALL_PROGRAM@ > > # Nonstandard autoconf-set variables. > LN_S=@LN_S@ > +host_alias=@host_alias@ > target_noncanonical=@target_noncanonical@ > > # Variables for the user (or the top level) to override. > @@ -183,7 +185,11 @@ regnattools: $(GCC_DIR)/stamp-gnatlib-rts > # put the host RTS dir first in the PATH to hide the default runtime > # files that are among the sources > # FIXME: This should be done in configure. > +ifeq ($(host), $(build)) > RTS_DIR:=$(strip $(subst \,/,$(shell gnatls -v | grep adalib ))) > +else > +RTS_DIR:=$(strip $(subst \,/,$(shell $(host_alias)-gnatls -v | grep adalib > ))) > +endif > gnattools-cross: $(GCC_DIR)/stamp-tools > # gnattools1-re > $(MAKE) -C $(GCC_DIR)/ada/tools -f ../Makefile \ > > -- > Alan Modra > Australia Development Lab, IBM
