http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45920
Summary: Building gcc: flags passed during configure step not
used everywhere
Product: gcc
Version: 4.5.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: other
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: phant...@gmail.com
I'm on a network with a hodgepodge of tools of varying versions, and I'm
attempting to remedy the problem, but I can only build from sources for this
particular environment.
The build target is sparcv9-sun-solaris2.10, and I configured with:
mkdir /usr1/tools/gcc-4.5.1-build
cd /usr1/tools/gcc-4.5.1-build
../gcc-4.5.1/configure --prefix=/usr1/local/gcc-4.5.1 \
--with-gmp=/usr1/local/gmp-5.0.1 \
--with-mpfr=/usr1/local/mpfr-3.0.0 \
--with-mpc=/usr1/local/mpc-0.8.2 \
--build=sparcv9-sun-solaris2.10 \
--enable-languages='c,c++' \
--with-stage1-ldflags='-O2 -m64 -mptr64 -mcpu=v9' \
--with-boot-ldflags='-O2 -m64 -mptr64 -mcpu=v9' \
CC=/opt/csw/gcc3/bin/gcc \
CFLAGS='-O2 -m64 -mptr64 -mcpu=v9' \
CPPFLAGS='-O2 -m64 -mptr64 -mcpu=v9' \
BOOT_CFLAGS='-O2 -m64 -mptr64 -mcpu=v9' \
LDFLAGS='-O2 -m64 -mptr64 -mcpu=v9'
The overload of flags is from me trying to find some way to get the portion I
encountered problems with to use the right flags.
During stage 1 (stage_last and stage_current both say stage 1 in them), it
enters the <build>/gcc directory and executes the Makefile there. It fails
after building (gensupport?) and errors when it tries to link them. The link
step has the appropriate flags to target a 64-bit platform, but the other two
object files target ELF32.
The error I was receiving was "wrong ELF class, ELFCLASS32" during link.
On line 3675 or so of (...)/gcc/Makefile, it has the following line:
$(COMPILER_FOR_BUILD) -c $(BUILD_COMPILERFLAGS) $(BUILD_CPPFLAGS) \
-o $@ $<
Neither BUILD_COMPILERFLAGS or BUILD_CPPFLAGS contain the appropriate flags I
set during the configure step. Furthermore, around line 136 the CFLAGS line is
empty -- which is probably the cause.
As a temporary workaround I added appropriate flags to line 136.
