On Fri, Nov 22, 2013 at 1:24 PM, Steve Ellcey <sell...@mips.com> wrote: > > I am building a cross GCC (targeting MIPS) on an x86-64 Linux system but I > want to build the compiler as a 32 bit executable. I thought the right way > to do this was to do: > > export CFLAGS='-O2 -g -m32' > export CXXFLAGS-'-O2 -g -m32' > > before running configure and make. > > This is working in that it created cc1 as a 32 bit executable like I wanted > it to but when the build continues and builds libgcc, it uses CFLAGS when > it is using the newly built gcc to compile libgcc. That is wrong because the > GCC compiler that I just built (targeting MIPS) does not understand the > -m32 flag and I don't want to override the options used when building the > libraries anyway, only the options used to build executables. > > Am I setting the wrong CFLAGS/CXXFLAGS variables? Or is this a bug? >
Can you not touch CFLAGS/CXXFLAGS? Instead, you do # CC="gcc -m32" CXX="g++ -m32" .../configure .... # make CC="gcc -m32" CXX="g++ -m32" ... -- H.J.
